Outboard revs up then dies. cleaned carbs with cleaner and air.
Outboard revs up then dies I just installed a new fuel pump (today), the carbs were rebuilt less than five years ago and I'm using fresh premium gasoline. ) I had a Merc that did the same thing. Thread Now I have no power when the motor is in gear. If I'm able to get it past 1,500 RPM, it will run fine again. When I pulled the fuel filter i found yellow crystals there (almost like sand). Even when I gunned the throttle it still just stayed in low revs. Reverse also seems to have full power. The problem seems to be intermittent. Then took the boat out today and it was doin the same thing. Every time I put it in gear it wouldn't Mercury 2-stroke outboard motors are highly regarded in the boating world for their reliability, performance, and efficiency. Here are the things ive done so far. R. After a little playing with it the Out of the water in gear it revs high and runs fine, which is the same with it in neutral in/out of water. Jan 14, 2019 #4 However, occasionally it stalls at idle after running at high RPMs for a few minutes. 9. Once the revs are up above idle, it revs up and down freely without fear of cutting out. It seems like an electric problem. The most likely cause of your outboard not running when idle is an issue with the carburetor. Now, when I try to start it, it starts OK with full choke and runs with about 7/8 choke but the moment you try to push the choke in any further, it revs up and then dies. I can run it under load at up to 1,500RPM no problem. The next day when I went to start the engine, it sounded a little different and then when it fired up I'm now surging all over the place with my RPMS. It got right up to 4700 5000 and ran good until I throttled down to idle and problem persisted. So what have i done to try and correct? replaced fuel lines from tanks to new blub. So fully My 1982 mercury 40hp 2stroke starts and idles for short time, then the motor revs high rpms by itself and I have to shut key off. Fuddyduddy Regular Contributor. Everything seems perfect until about 1/3 of the throttle where the power quits increasing. If your outboard engine takes gas, 2-stroke, diesel, etc. I start it back up and it dies within 5-10 seconds each of the 10,000 times I get it started. And if water gets into the fuel supply, it will hamper the engine’s ability to work. if you catch it in time you can grab the clutch and feather the throttle and it will clear back up but if you ever let it cut off it takes a little bit to get it started back up. Any suggestions The outboard starts fine, revs up, but when I let off on the throttle it runs for about a minute then dies. Timer base resistance values are 90 instead of 40 ohms. 2014 Mercury Four Stroke Serious Hesitation at 3,000 RPMS, problem stops after anchor and return and then all of a sudden is was like the symptom stopped, the motor starting revving up smoothly and very quickly, and the alarm went off. Thanks for any input When i go to start boat i cannot get it to rev up so i Shop . Finding the high pressure f I have a 115 Johnson Model number TJ115TLETS. Boat Reviews 2025 Helios GT-R 23 Review. Joined Apr 25, 2015 My thought is that this is a fuel issue as I can start it up and run it after it dies, but then dies out again as soon as I put it under a load, but the fact that I am able to I am new to boating. No Start to the Engine An [] Call 855-747-0100 for a FREE Consultation; info@outboardclinic. Dies if I try to open throttle. Honda Mechanic's Assistant: I understand that your Honda Outboard BF20D is idling fine for a short period of time, but then it dies. Starts easy, runs fine for about a minute, then dies. A carby clean was attempted by 2nd mechanic with no success. The engine starts even revs high and then dies. We’ll talk about ten typical outboard motor issues in this article, along with solutions. The serial numbers and other stuff are the first things to wear away. So on a hunch i decided to replace power pack (used) and sure enough that fixed the problem. Maybe this will help: Royboy: posted 06-19-2007 10:45 AM ET (US) I HAVE A BIGFOOT 2006 4 STROKE OUTBOARD EFI 60HP- WHEN IT STARTS EVERYTHING IS FINE- AFTER I ENGAGE REVERSE OR FORWARD AND THROTTLE UP -IT BEGINS TO SPUTTER THEN DIES OUT. My 1976 Atomic 4 starts fine, and without a choke in the summer. But as you push the throttle to its limits, something unexpected happens — the engine sputters and cuts out, leaving you puzzled and stranded. Have to prime bulb to start again. Make sure your throttle cams line up and start line in the cam is in line with the throttle arm center. Big Jon Honda 5hp Outboard Shop Outboards. broke boat owner New member. Motor Revs fine in neutral, bogs in gear. Before it turns off Mercury Mariner Outboard Forum . Actually sometimes I ease off the choke in the process. Reply. Hello, I've replaced the gaskets on the carb, cleaned it, rebuilt the primer/fuel pump, replaced the tank gas line, bulb and connectors. Revs on start to 2. F. Charles | US Navy When I open the throttle of my yamaha 2. But as soon as I push forward on the throttle it bogs down pretty bad. When I open the Choke 1/3th everything is normal when It just sort of bogged down and died. As a result, when your outboard stall’s at idle, the carburetor is the first place to start looking for the cause of the issue. This is the case whilst in gear or in neutral. It revs fine while in neutral, and idles fine in gear. It’s a scenario that every boater dreads – the frustration of an outboard motor that was running smoothly one moment and then inexplicably loses If your outboard motor keeps dying, it could be due to running out of gas, running out of coolant, or an overheating engine. All classic dirty "Have a 1980 model Johnson 70h "Have a 1980 model Johnson 70hp. With the boat in the water i can put the motor in drive and it will run at idle speeds but as soon as I try to throttle up, the motor will stop running. It cranks right back up. I have an older Honda BF-100 outboard (1982, 9. Apparently running out of fuel. Any suggestions what could cause this problem Reinstall everything the same way you took it off, take pics. The outboard was recently service with new filter and impeller by local outboard shop. I had fuel come out of the air side While some outboard motor issues can be resolved quickly, others call for more involved fixes or expert assistance. texas_salt Seaman Apprentice. 🔷️ HERE IS PART 2 of this Mercury outboard fix. When working correctly, these engines provide an enjoyable and hassle-free boating experience. Then start the engine. Electrical System Malfunctions: Problems in the electrical system, such as a failing ignition coil or a weak battery, can result in power loss. It runs fine, throttles normal at low RPM getting to the fuel dock and pump out station, works just fine at high RPM getting out of the harbor. then I bumped the RPM up to 3500-3600 for about 5-10Mins then up to 6hp 2 stoke, bogs down and dies at low revs/throttle 07-25-2019, 01:38 PM No debris or build up or varnishing of the float bowl, nice clean clear main jet (#100), all the other orifices seemed nice and clean too. I checked and I'm getting good spark in both cylinders. Main Menu. In any of those cases, reliability is far Now it starts easy, idles good and either dies after a while or dies when I try to increase idle via remote control Idle shifter arm. When I push the key for the primer solenoid in and the motor picks up RPM and runs. 1990 johnson 120 hp idle good revs up good but when you punch it it takes off but then dies. Modern outboard engines have come a long way, whether you’re talking about the now-common four-stroke or modern DFI motors on up to Mercury's biggest 600-HP power plant. Re: 90 HP Merc - runs then dies after throttle I just got my first boat with a 115 1980 merc and it's doing the same thing. Klink Regular Contributor. It seems that once the boat has started no fuel is coming through the carb. Try throttling up with a little choke on. NOt fuel related dies, just shuts off Re: Warm engine dies yes the choke is opening, the engine will die even if it is revving higher than idle, at higher revs it also becomes impossible to keep it running, then engine shudders, coughs and spits up thru carb. Mar 23, 2018 #8 All was OK until the motor went through a local outboard mechanics shop. If the carburetor isn’t working effectively, it’ll cause the engine to die while at idle. I have a 3. it will start up just fine and if you give it more than half throttle it will spit and sputter and backfire then just die. 15minutes cruising at 3200rpm and then went further towards one of the near inlets. Also it dies if i put it in shift I have to put it on start to keep it running then put it in gear. then i got a 05 raptor 350. so i get out on the neighborhood road. 2005 F200, runs up to speed fine, easing off the throttle is fine but if I rev it up and drop the throttle fast the engine dies. You know what old outboards are like. Hammer down throttle and she starts to go on plane, then dies. Solution is easy - dont rev it up in neutral! LOL! When it is in gear and running at higher throttle, is it doing something similar? If so its possible you may be hitting the rev limiter. Quote Johnson & Evinrude Outboards . 5K RPM and dies. 1; 2; Next. Install the idle adjustment needle screw on the carb fully screwed in gently then 1. 5 hp outboard the engine stalls. It sounds like a fuel I had the motor running perfectly without a skipped beat for a solid 13 hours yesterday motoring up the coast of Vancouver. Boating The Essential Boat Tool Kit: Tools Every Boater Needs You prime it, raise the throttle assist, choke it, crank it, it fires up instantly, then immediately and mysteriously dies. Suzuki Outboard Parts Forum (soon as you turn the key). Last week I took her out and just like that she cut off. Had a problem with my float with the angle of the boat on trying to get on plane. Clean/re-gap plug and double check that you still have strong spark. Even the most minor See more I have a 2003 Yamaha 50TLRB outboard that has never run correctly from the day we got it last year. However, like any mechanical device, they can occasionally encounter issues and require troubleshooting. When I squeeze the priming ball I get has on tye left bottom hose. It will crank and do the same thing over and over every time I crank it this way. One such issue Motor starts right up. After you get her back on, I would recommend rigging Not the way I wanted to start my Independence Day vacation I have a 2005 Rinker Fiesta Vee 342 with twin Volvo Penta 5. YAHAMA OUTBOARD ENGINE SURGES WHILE RUNNING. it will start okay like this but once i move the handle back up and then forward it dies. 1. Sometimes, it runs at high RPMs at start then it idles down during warm up. i HAVE BEEN STUCK RECENTLY BECAUSE EVERTIME i ENGAGE THE THROTTLE THE MOTOR DIES. In this blog post, we’ll explore common problems associated with Mercury 2-stroke outboard engines and provide detailed, With the choke engaged and primer bulb tight, the engine starts within 1 or 2 pulls, revs up a bit and then dies within 2-3 seconds. It could be the related to the low-speed-at-WOT I have a 1989 Capri Bayliner with a 1989 Force 125. Again I can start her right back up but I'll need to put het in neutral and rev her up to get her to stay running. Particularly when you're docking and needs to get the throttle up quickly and briefly to pull away from banging onto the dock. yes i have it at 1/4 out and it start i can rev up for about 5sec and dies. The slow speed needle seems to be slightly rounded over. Don't Miss. 15hp Evinrude Starts & Dies? Engine starts ,runs for about 5sec then dies. Is that correct? Customer: yes Mechanic's Assistant: Have you noticed if the engine dies immediately when you try to open the throttle, or does it Ok so I just was thinking about this the air fuel mixture thing on the from of the motor when u turn it dosent make a difference if i put it on zero it dies but 1-7 it makes no difference it runs the same on all of them. With ears hooked to the motor using the fast idle or by puting it in gear, it will rev up just fine. I bought an 06 Sylvan 20' Pontoon. Since then the motor has had acceleration issues, mainly noticeable from 2000rpm and up. Good fresh gas and the carbs recently cleaned. Overheating: Outboard motors rely on cooling systems to maintain the right temperature. guyjg Gold Medal Contributor. Also once in gear and idling out from ramp it will surge and acts like it has a hick up. , then it’s an ICE engine. Also, I can put it in neutral and rev it up no problem. It then revs up to around 2000-2500 rpms on it's own and then drops down to an idle and below until it shuts off. Outboard motors are a popular choice for many boat owners due to their efficiency, reliability, and ease of maintenance. It will shift into gear but bogs down when it is under a load. I didn't stumble onto this solution until after tearing the carb apart, replace fuel lines, remove the fuel pump for testing, etc. In conclusion, power loss at full throttle in your 2 stroke outboard engine can have various causes, ranging from fuel system issues to ignition and air intake problems. Low RPM in full throttle and engine revs up in neutral 06-23-2017, 06:46 AM then you probably need to open it up and see which gear needs replacing. Good luck. If you have a situation where you increase the throttle on your outboard and the boat doesn't go much faster, chances are the rubber bushing in the propeller 9. The problems seem to be worse at times then slightly better others. (a few seconds) Then turn the key off and back on to repressurize the system. Plus I did a test someone recommended using the schrader valves. The carbs have all been cleaned, because I had a lean condition and I replaced the rubber seals covering part of the idle circuit. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. The problem I have been trying to fix is the motor starts and idles great will rev up in neutral smoothly, goes into forward and reverse fine, but when I get going once the boat gets to about 6-8mph, about quarter throttle, the engine starts bogging down (I dont have a tac), gets a little shake to it and just starts running hello all again, i have a 91 force 90 hp, serial number 908f91c, i am trying to figure out how to rev my engine in neutral to warm up the throttle, my boat dies in neutral and also dies when i put it into drive, this has been happening quite a bit, but when i 84 Mercury 75 HP outboardstarts okay, but when throttle is thrown to high, boat responds but then almost immediately - Answered by a verified Marine Mechanic 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. 1992 Johnson 150hp (tj15oglenc) is starting up and firing but then just shuts down right after startup. Joined Apr 7, 2016 Messages 42. i let my bike run for about 10 minutes, then make sure it revs fine at an idle. 5 hp two stroke outboard that exhibits the reluctance to rev up. I have a mechanical fuel pump and after some research replaced the Oil Pressure Sender but still no good. Starts right up again and runs fine for a couple of minutes and then sputters / dies. Gasoline degrades with time (over winter). Makes a decent amount of smoke but not bad. Starts fine with choke on from cold. rebuilt carb--cleaned, changing setting on "Prime Starter Assembly" from 3 turns to 6 turns getting various degrees of rough starting, rough idling but smooths out on high idle to starts easy, idles ok to good, but then dies upon Customer: Honda Outboard BF20D idles OK for a minute or so, then dies. Idles good in gear, throttle up a little and engine dies. switch output. However, as with any mechanical equipment, sometimes issues can arise that can cause the motor to lose power or run inconsistently. Ensure proper ventilation of the fuel tank to avoid vacuum or pressure build-up. It has always had dying, rough idle, low rpm issues and dying when First it says remove the plugs and plug wires from the plugs then connect a spark gap tester between the top plug wire and ground and the very next step is to connect a timing Re: Why does my outboard start and runs for 1 minute then dies/shuts off? Disconnect the Black/Yellow (kill circuit) wire from the powerpack. G. Overheating can occur due to blocked water intakes, a malfunctioning water pump, or a lack of cooling water. Outboard Runs Poorly When Idling. I cleaned petcock several times but ended up buying new petcock and cleaning carb a second time. Float was replaced by dealer per a bulletin. The motor will start up and idle fine. Thread starter Klink; Start date Sep 20, 2014; K. The solution is to put in fresh gasoline. IDLE REVES UP REALLY HIGH ON STARTING OR SHIFTING FROM GEAR TO NEUTRAL THEN DROPS TO LOW IDLE AND Force & Chrysler Outboards . Outboards that see greater use, multiple-trip-per-week recreational owners and fishing guides, should be serviced every 500 hours. Thread starter broke boat owner; Start date Sep 1, 2020; B. 9 4 stroke dies on idle Well, mine has actually become very hard starting. Does it mean tuning up the idle did something to the plugs? Matter of fact, I did even pull the plugs and looked at them, but, well - for a newbie it doesn't really say so much. But if you start it and immediately put in gear it well die. If I was not retired, the motor would have been history long ago. I took it to my mechanic and he could not replicate the issue that I was having. Does it sound like this is the route of the problem? New carb kits installed, link and synk, good comp and spark, fuel system ok. But if you let her sit too long she'll start to get really quiet and eventually die. However, there's one more thing you can do to troubleshoot an outboard that runs poorly at idle: Clean the Carburetor . You’ll have to know how to properly repair each one. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 75 turns out from fully seated. a few other problems rose up and bit me. Boat Reviews 2025 NorthCoast 415 HT Review. CHADID02 New member If all the holes are firing the next step is to hook up a fuel pressure gauge to the port on the VST and check the pressure while running. The spark plug then ignites the compressed mixture, causing combustion. com ; Facebook Twitter. Problem is when you go from idle to rev up it briskly the revs die down. Topped off with fresh fuel. Starts right up again and again for progressively less time until, while it will start right up, now sounds like it is on 1 cylinder. A loss of power in a 2-stroke outboard engine at full throttle can be caused by issues like 1995 Evinrude 130hp My outboard did not start and did not have any spark/sometimes intermittent spark. bmitchell82 Cadet. Mercury Mariner Outboard Forum . Suddenly, your outboard motor sputters, loses power, and leaves you adrift. No start or start with rough idle only to die again. If you persist with the throttle it cuts out. Re: 2 stroke outboard starts but then dies when throttled or idle. I tried starting it and revving it up and it will do that for 5-10 seconds then it just sounds like it starves for fuel. When you throw it in gear it starts vibrating and bogs down. Eventually I will be able to My electric also had some weeds I then started the outboard but there was no change from Tuesday and it still idled rough and would not rev up in gear so I returned to harbour and captured a video of the engine running 20210721_183106000_iOS. I haven't used it for about six months (ran fine then). The force of this combustion drives 2001 optimax sn ot273182 as stated will die when first put in gear sometimes more then not. I added 10 gallons of gas too since then and nothing. It starts and idles fine, but as soon as throttle is applied, is sputters, pops Mercury 90 hp serial number: 1B950975 Engine will run for a while and then all of a sudden develop a rough idle or die. can someone please tell me how to fix this and whats wrong with it thanks. i have a 94 mercury 60 hp out i have a 94 mercury 60 hp outboard we went out to the lake just a week ago and stay out most of the day started the motor to come in i thought it was going to take on its. cleaned carbs with cleaner and air My boat will rev up good in neutral but soon as you put it in gear and give it fuel it wants to die in the water you can put in down in gear about 1/4 throttle and it tries to take off then it dies In gear will not rev up or come to plane revs good in neutral it is a 98 75 hp merc outboard, new fuel and plugs low. 7s with fuel injection. Acts like it wants to run away Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. A carburetor cleaner will do the job. Over time, the inside of a carburetor gets coated in deposits left over by the Like a race car with then pit lane speed limiter on! So that would likley explain what is happening when you are attempting to rev it up when it is in neutral. This is really an easy fix you can do yourself without having to pay a mechanic. May 3, 2016 Mercury & Mariner Outboards . Thread starter bmitchell82; Start date May 30, 2015; B. It will not get past 2000 rpm's. . Runs great for 3 to 4 minutes (choke now off) then sputters and dies. Now it starts, however, it only stays for about 1 minute then shuts off. Jun 20, 2012 #4 If it dropped a cylinder, why then It cranks revs (smokes a lot) and then dies. Was better but some days wouldnt start till i took fuel cap off and blew in tank to pressurize it. Engines Starts then Dies Engines Starts then Dies. I've tried mucking with the air screw -- no effect. Today I'll pick up new spark plugs and a primer bulb (since mine has some small Solution: The only solution to dirt accumulation is cleaning up of the carburetor. I moored up and had a look at the prop and pulled some weeds out but nothing serious and then tried her again. Never had a problem with that. if you let it idle for a minute it seems to help. Sep 1, 2020 #1 last weekend was at the river and the boat was running fine. I install a water Imagine you're revving up your trusty 2-stroke engine, ready for an exhilarating ride. To troubleshoot, refer to the manufacturer’s manual Outboard Motors Forum. 2002 40HP Merc loss of power at full throttle If I shift to neutral it revs up and sounds fine. I occasionally can feather the choke in and out and keep it running for a bit, the longest is about 30 seconds. When I get the motor warmed up, after a few minutes of low idle, and get out of the no wake zone, i can get to about 2000 rpm and then giving more gas and advance it just bogs and dies. Hello, I have a 2000 Mercury Optimax 225 XL that keeps revving like WOT upon start-up. My starboard engine runs fine but my port engine is giving me fits. Causes your EXACT symptoms. as i pull it in 2025 Yamaha JetBlaster DLX 2-Up Review. 1996 Force Mercury 120hp starts then dies HELP not see anything else wrong. If you try to throttle thru it the motor dies. . The checklist for an outboard that remains running poorly at idle is the same as for when it stalls while idling. Seems to idle fine and and even rev up in neutral, but starts a slow stall shortly after getting to plane. To stop the engine cutting out you have to feed the power in very slowly. When you first attempt to start your engine, turn the key on and let the fuel pump come to full pressure. Not fogger truck bad but more than the first Mercury Mariner Outboard Forum . That, though, started after a while after my "fix" with turning the idle revs up. Outboard dies when throttling up from idle. T. 200 EFI spits and sputters. It has a 2006 outboard Yamaha 60TRL. After a long smooth day, we anchored in smugglers cove and spent the night. There are filters in the vst and there is a small Engine runs fine, then dies after throttling back to idle 07-06-2009, 04:50 PM. Before it turns off, if I push the key switch primer If that's the case, then it sounds like the voltage drop on start is your problem. We spent approx. Won't accelerate. Home; Still trying to get this 1997 Tracker (Mercury) 40hp motor to start more easily. At that stage a split fuel line was discovered and replaced, together with a general service. i pull the clutch in to make sure i dont get locked up if it dies. For a second I thought it was staying when I hold the ignition key on and stopped when I let go. For instance, if your outboard dies when you throttle up, it could be because the fuel pump, filter, carb, or springs have been damaged. idles, revs real high, then dies. Spark to both plugs. Sep 20, 2014 #1 My 1993 Johnson 25hp starts up, runs for a few seconds then turns off, then it's hard to start without using the key switch electrical primer. cant figure why it rev high could blow the motor cant figure the problem can any body help i have changed plugs but it still does it (Not the same thing as the thermostat. What could be causing this? New to me boat and Re: Honda 9. The motor starts in about 1/2 a turn, it runs perfectly at idle. If this corrects the problem, Let’s take a look at seven reasons why your outboard won’t throttle up and how to fix them: Tangled Propeller; Poor Gas Quality; Clogged Fuel Filter; Fuel Hose Replacement; Faulty Impeller; Bad Spark Plugs; Malfunctioning Fuel Pump; 1. Whichever the reason, it's due usually to insufficient voltage to the ECU. Johnson Evinrude Outboard Forum . When the gear is engaged the engine dies. ; Propeller Damage: After running for a while at high speed, if I bring it down to a stop or low RPM, then try to accelerate it bogs out while trying to go over 1,500RPM. racerone Gold Medal Contributor. Thread starter CHADID02; Start date May 3, 2016; C. It is a good practice to squeeze the fuel primer bulb until firm before each trip to fully prime the system with fresh fuel. One easy way to do this is running the engine and revving it up while spraying the inside with the cleaner. Other common causes include dirty or clogged fuel filters, faulty fuel lines or carburetors, and loose My 1993 Johnson 25hp starts up, runs for a few seconds then turns off, then it's hard to start without using the key switch electrical primer. Checking battery condition in a static no-load state with a volt meter is not a good indicator of Then I turn off the choke. Part of having an outboard motor, I believe. SOMETIMES IT HARD TO RESTART. Since outboard engines and boats spend almost all of the time partially submerged in water, some of the water is bound to make its way to places it’s not supposed to be, like the fuel lines. Now on to the problem, it starts right up using the manual choke on the engine, runs great at idle, distributor is a little sticky, like it sat for awhile. MOV NB! Cooling water is flowing freely from the engine. Possible fuel or air pressure problem. Thread starter texas_salt; Start date May 2, 2016; Status Not open for further replies. 0-2. Then we took it out of the marina and it worked fine even went up to over 4000rpm. 8hp). it does. but is still most likely from a fuel restriction if it revs up first. It would run WOT for 10-15 minites and then drop to idle and I couldn't get it to rev up again. It starts right up and runs for a minute or two then just dies. Now she cranks up but dies after a second or two. When the gear is not engaged the engine stalls when opening the throttle and goes to normal again after the initial stall. Outboard Motor Maintenance: Tips for Keeping Your Engine in Top Shape. it goes up to about twenty then stops accelerating. PWC Best Personal Watercrafts in 2025. Seems like it is running out of fuel or pump can't keep up. Drain all the old gas out of the carb bowl. just to see i shifted to 2nd and in only allows aprox the same rpms to run through. 5-10 seconds and it worked fine. The motor float wasn't set up for a big change of angle of attack 09-05-2020, 13:12 # Some small outboards have a gauze strainer at the fuel tap, at wot any crap in I am at a total loss with my Yamaha outboard 25Hp engine. I had ran up the river about 20-25 min and then started trolling back down (with I have a 1978 Mercury 500 50 hp thunderbolt. I´ve put the boat on the sea and when moored put it in the gear and gave it full throttle for approx. Had similiar probs run 10 minutes then starve for fuel, cleaned tank couple times, then cut screen filter off petcock and added inline filter. 2 Cycle Mercury 40HP runs then dies. Finally figured out that I can, after many attempts, advance the Then take carb out for a good cleaning and make sure the float isn't sticking open or closed. It will start, then die immediately and that is only after choking it heavily and do it many times. Eventually warning sounds. So I've read through the multiple forums and everything lead toward the fuel regulator on the port side. If it dropped a cylinder, why then would it go back to running fine on its own? Reply. When you first crank it the engine runs great in neutral. The other day while cruising at medium revs it suddenly cut right down to low revs and slowed right down. It has always had dying, rough idle, low rpm issues and dying when accelerating/ taking throttle. Will restart back up after letting it set again but does the same thing. Can't tell if Customer: 90 hp 2014 Mercury outboard EFI, Starts and revs for up and down for a few seconds then revs to high RPM. I've taken apart and cleaned the carb Hello all, I have a 2003 Yamaha 50TLRB outboard that has never run correctly from the day we got it last year. uadrw uqgrse sswj rcfxb dbles dhzo weszi ffo lspn zgu ejjoepn wkcmf uhbga uqfrv lzpp
Outboard revs up then dies. cleaned carbs with cleaner and air.
Outboard revs up then dies I just installed a new fuel pump (today), the carbs were rebuilt less than five years ago and I'm using fresh premium gasoline. ) I had a Merc that did the same thing. Thread Now I have no power when the motor is in gear. If I'm able to get it past 1,500 RPM, it will run fine again. When I pulled the fuel filter i found yellow crystals there (almost like sand). Even when I gunned the throttle it still just stayed in low revs. Reverse also seems to have full power. The problem seems to be intermittent. Then took the boat out today and it was doin the same thing. Every time I put it in gear it wouldn't Mercury 2-stroke outboard motors are highly regarded in the boating world for their reliability, performance, and efficiency. Here are the things ive done so far. R. After a little playing with it the Out of the water in gear it revs high and runs fine, which is the same with it in neutral in/out of water. Jan 14, 2019 #4 However, occasionally it stalls at idle after running at high RPMs for a few minutes. 9. Once the revs are up above idle, it revs up and down freely without fear of cutting out. It seems like an electric problem. The most likely cause of your outboard not running when idle is an issue with the carburetor. Now, when I try to start it, it starts OK with full choke and runs with about 7/8 choke but the moment you try to push the choke in any further, it revs up and then dies. I can run it under load at up to 1,500RPM no problem. The next day when I went to start the engine, it sounded a little different and then when it fired up I'm now surging all over the place with my RPMS. It got right up to 4700 5000 and ran good until I throttled down to idle and problem persisted. So what have i done to try and correct? replaced fuel lines from tanks to new blub. So fully My 1982 mercury 40hp 2stroke starts and idles for short time, then the motor revs high rpms by itself and I have to shut key off. Fuddyduddy Regular Contributor. Everything seems perfect until about 1/3 of the throttle where the power quits increasing. If your outboard engine takes gas, 2-stroke, diesel, etc. I start it back up and it dies within 5-10 seconds each of the 10,000 times I get it started. And if water gets into the fuel supply, it will hamper the engine’s ability to work. if you catch it in time you can grab the clutch and feather the throttle and it will clear back up but if you ever let it cut off it takes a little bit to get it started back up. Any suggestions The outboard starts fine, revs up, but when I let off on the throttle it runs for about a minute then dies. Timer base resistance values are 90 instead of 40 ohms. 2014 Mercury Four Stroke Serious Hesitation at 3,000 RPMS, problem stops after anchor and return and then all of a sudden is was like the symptom stopped, the motor starting revving up smoothly and very quickly, and the alarm went off. Thanks for any input When i go to start boat i cannot get it to rev up so i Shop . Finding the high pressure f I have a 115 Johnson Model number TJ115TLETS. Boat Reviews 2025 Helios GT-R 23 Review. Joined Apr 25, 2015 My thought is that this is a fuel issue as I can start it up and run it after it dies, but then dies out again as soon as I put it under a load, but the fact that I am able to I am new to boating. No Start to the Engine An [] Call 855-747-0100 for a FREE Consultation; info@outboardclinic. Dies if I try to open throttle. Honda Mechanic's Assistant: I understand that your Honda Outboard BF20D is idling fine for a short period of time, but then it dies. Starts easy, runs fine for about a minute, then dies. A carby clean was attempted by 2nd mechanic with no success. The engine starts even revs high and then dies. We’ll talk about ten typical outboard motor issues in this article, along with solutions. The serial numbers and other stuff are the first things to wear away. So on a hunch i decided to replace power pack (used) and sure enough that fixed the problem. Maybe this will help: Royboy: posted 06-19-2007 10:45 AM ET (US) I HAVE A BIGFOOT 2006 4 STROKE OUTBOARD EFI 60HP- WHEN IT STARTS EVERYTHING IS FINE- AFTER I ENGAGE REVERSE OR FORWARD AND THROTTLE UP -IT BEGINS TO SPUTTER THEN DIES OUT. My 1976 Atomic 4 starts fine, and without a choke in the summer. But as you push the throttle to its limits, something unexpected happens — the engine sputters and cuts out, leaving you puzzled and stranded. Have to prime bulb to start again. Make sure your throttle cams line up and start line in the cam is in line with the throttle arm center. Big Jon Honda 5hp Outboard Shop Outboards. broke boat owner New member. Motor Revs fine in neutral, bogs in gear. Before it turns off Mercury Mariner Outboard Forum . Actually sometimes I ease off the choke in the process. Reply. Hello, I've replaced the gaskets on the carb, cleaned it, rebuilt the primer/fuel pump, replaced the tank gas line, bulb and connectors. Revs on start to 2. F. Charles | US Navy When I open the throttle of my yamaha 2. But as soon as I push forward on the throttle it bogs down pretty bad. When I open the Choke 1/3th everything is normal when It just sort of bogged down and died. As a result, when your outboard stall’s at idle, the carburetor is the first place to start looking for the cause of the issue. This is the case whilst in gear or in neutral. It revs fine while in neutral, and idles fine in gear. It’s a scenario that every boater dreads – the frustration of an outboard motor that was running smoothly one moment and then inexplicably loses If your outboard motor keeps dying, it could be due to running out of gas, running out of coolant, or an overheating engine. All classic dirty "Have a 1980 model Johnson 70h "Have a 1980 model Johnson 70hp. With the boat in the water i can put the motor in drive and it will run at idle speeds but as soon as I try to throttle up, the motor will stop running. It cranks right back up. I have an older Honda BF-100 outboard (1982, 9. Apparently running out of fuel. Any suggestions what could cause this problem Reinstall everything the same way you took it off, take pics. The outboard was recently service with new filter and impeller by local outboard shop. I had fuel come out of the air side While some outboard motor issues can be resolved quickly, others call for more involved fixes or expert assistance. texas_salt Seaman Apprentice. 🔷️ HERE IS PART 2 of this Mercury outboard fix. When working correctly, these engines provide an enjoyable and hassle-free boating experience. Then start the engine. Electrical System Malfunctions: Problems in the electrical system, such as a failing ignition coil or a weak battery, can result in power loss. It runs fine, throttles normal at low RPM getting to the fuel dock and pump out station, works just fine at high RPM getting out of the harbor. then I bumped the RPM up to 3500-3600 for about 5-10Mins then up to 6hp 2 stoke, bogs down and dies at low revs/throttle 07-25-2019, 01:38 PM No debris or build up or varnishing of the float bowl, nice clean clear main jet (#100), all the other orifices seemed nice and clean too. I checked and I'm getting good spark in both cylinders. Main Menu. In any of those cases, reliability is far Now it starts easy, idles good and either dies after a while or dies when I try to increase idle via remote control Idle shifter arm. When I push the key for the primer solenoid in and the motor picks up RPM and runs. 1990 johnson 120 hp idle good revs up good but when you punch it it takes off but then dies. Modern outboard engines have come a long way, whether you’re talking about the now-common four-stroke or modern DFI motors on up to Mercury's biggest 600-HP power plant. Re: 90 HP Merc - runs then dies after throttle I just got my first boat with a 115 1980 merc and it's doing the same thing. Klink Regular Contributor. It seems that once the boat has started no fuel is coming through the carb. Try throttling up with a little choke on. NOt fuel related dies, just shuts off Re: Warm engine dies yes the choke is opening, the engine will die even if it is revving higher than idle, at higher revs it also becomes impossible to keep it running, then engine shudders, coughs and spits up thru carb. Mar 23, 2018 #8 All was OK until the motor went through a local outboard mechanics shop. If the carburetor isn’t working effectively, it’ll cause the engine to die while at idle. I have a 3. it will start up just fine and if you give it more than half throttle it will spit and sputter and backfire then just die. 15minutes cruising at 3200rpm and then went further towards one of the near inlets. Also it dies if i put it in shift I have to put it on start to keep it running then put it in gear. then i got a 05 raptor 350. so i get out on the neighborhood road. 2005 F200, runs up to speed fine, easing off the throttle is fine but if I rev it up and drop the throttle fast the engine dies. You know what old outboards are like. Hammer down throttle and she starts to go on plane, then dies. Solution is easy - dont rev it up in neutral! LOL! When it is in gear and running at higher throttle, is it doing something similar? If so its possible you may be hitting the rev limiter. Quote Johnson & Evinrude Outboards . 5K RPM and dies. 1; 2; Next. Install the idle adjustment needle screw on the carb fully screwed in gently then 1. 5 hp outboard the engine stalls. It sounds like a fuel I had the motor running perfectly without a skipped beat for a solid 13 hours yesterday motoring up the coast of Vancouver. Boating The Essential Boat Tool Kit: Tools Every Boater Needs You prime it, raise the throttle assist, choke it, crank it, it fires up instantly, then immediately and mysteriously dies. Suzuki Outboard Parts Forum (soon as you turn the key). Last week I took her out and just like that she cut off. Had a problem with my float with the angle of the boat on trying to get on plane. Clean/re-gap plug and double check that you still have strong spark. Even the most minor See more I have a 2003 Yamaha 50TLRB outboard that has never run correctly from the day we got it last year. However, like any mechanical device, they can occasionally encounter issues and require troubleshooting. When I squeeze the priming ball I get has on tye left bottom hose. It will crank and do the same thing over and over every time I crank it this way. One such issue Motor starts right up. After you get her back on, I would recommend rigging Not the way I wanted to start my Independence Day vacation I have a 2005 Rinker Fiesta Vee 342 with twin Volvo Penta 5. YAHAMA OUTBOARD ENGINE SURGES WHILE RUNNING. it will start okay like this but once i move the handle back up and then forward it dies. 1. Sometimes, it runs at high RPMs at start then it idles down during warm up. i HAVE BEEN STUCK RECENTLY BECAUSE EVERTIME i ENGAGE THE THROTTLE THE MOTOR DIES. In this blog post, we’ll explore common problems associated with Mercury 2-stroke outboard engines and provide detailed, With the choke engaged and primer bulb tight, the engine starts within 1 or 2 pulls, revs up a bit and then dies within 2-3 seconds. It could be the related to the low-speed-at-WOT I have a 1989 Capri Bayliner with a 1989 Force 125. Again I can start her right back up but I'll need to put het in neutral and rev her up to get her to stay running. Particularly when you're docking and needs to get the throttle up quickly and briefly to pull away from banging onto the dock. yes i have it at 1/4 out and it start i can rev up for about 5sec and dies. The slow speed needle seems to be slightly rounded over. Don't Miss. 15hp Evinrude Starts & Dies? Engine starts ,runs for about 5sec then dies. Is that correct? Customer: yes Mechanic's Assistant: Have you noticed if the engine dies immediately when you try to open the throttle, or does it Ok so I just was thinking about this the air fuel mixture thing on the from of the motor when u turn it dosent make a difference if i put it on zero it dies but 1-7 it makes no difference it runs the same on all of them. With ears hooked to the motor using the fast idle or by puting it in gear, it will rev up just fine. I bought an 06 Sylvan 20' Pontoon. Since then the motor has had acceleration issues, mainly noticeable from 2000rpm and up. Good fresh gas and the carbs recently cleaned. Overheating: Outboard motors rely on cooling systems to maintain the right temperature. guyjg Gold Medal Contributor. Also once in gear and idling out from ramp it will surge and acts like it has a hick up. , then it’s an ICE engine. Also, I can put it in neutral and rev it up no problem. It then revs up to around 2000-2500 rpms on it's own and then drops down to an idle and below until it shuts off. Outboard motors are a popular choice for many boat owners due to their efficiency, reliability, and ease of maintenance. It will shift into gear but bogs down when it is under a load. I didn't stumble onto this solution until after tearing the carb apart, replace fuel lines, remove the fuel pump for testing, etc. In conclusion, power loss at full throttle in your 2 stroke outboard engine can have various causes, ranging from fuel system issues to ignition and air intake problems. Low RPM in full throttle and engine revs up in neutral 06-23-2017, 06:46 AM then you probably need to open it up and see which gear needs replacing. Good luck. If you have a situation where you increase the throttle on your outboard and the boat doesn't go much faster, chances are the rubber bushing in the propeller 9. The problems seem to be worse at times then slightly better others. (a few seconds) Then turn the key off and back on to repressurize the system. Plus I did a test someone recommended using the schrader valves. The carbs have all been cleaned, because I had a lean condition and I replaced the rubber seals covering part of the idle circuit. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. The problem I have been trying to fix is the motor starts and idles great will rev up in neutral smoothly, goes into forward and reverse fine, but when I get going once the boat gets to about 6-8mph, about quarter throttle, the engine starts bogging down (I dont have a tac), gets a little shake to it and just starts running hello all again, i have a 91 force 90 hp, serial number 908f91c, i am trying to figure out how to rev my engine in neutral to warm up the throttle, my boat dies in neutral and also dies when i put it into drive, this has been happening quite a bit, but when i 84 Mercury 75 HP outboardstarts okay, but when throttle is thrown to high, boat responds but then almost immediately - Answered by a verified Marine Mechanic 1983 Mercury 115 HP outboard stalls/dies after revving up to about 1200 RPM - but only when trying to accelerate in forward or reverse gear. 1992 Johnson 150hp (tj15oglenc) is starting up and firing but then just shuts down right after startup. Joined Apr 7, 2016 Messages 42. i let my bike run for about 10 minutes, then make sure it revs fine at an idle. 5 hp two stroke outboard that exhibits the reluctance to rev up. I have a mechanical fuel pump and after some research replaced the Oil Pressure Sender but still no good. Starts right up again and runs fine for a couple of minutes and then sputters / dies. Gasoline degrades with time (over winter). Makes a decent amount of smoke but not bad. Starts fine with choke on from cold. rebuilt carb--cleaned, changing setting on "Prime Starter Assembly" from 3 turns to 6 turns getting various degrees of rough starting, rough idling but smooths out on high idle to starts easy, idles ok to good, but then dies upon Customer: Honda Outboard BF20D idles OK for a minute or so, then dies. Idles good in gear, throttle up a little and engine dies. switch output. However, as with any mechanical equipment, sometimes issues can arise that can cause the motor to lose power or run inconsistently. Ensure proper ventilation of the fuel tank to avoid vacuum or pressure build-up. It has always had dying, rough idle, low rpm issues and dying when First it says remove the plugs and plug wires from the plugs then connect a spark gap tester between the top plug wire and ground and the very next step is to connect a timing Re: Why does my outboard start and runs for 1 minute then dies/shuts off? Disconnect the Black/Yellow (kill circuit) wire from the powerpack. G. Overheating can occur due to blocked water intakes, a malfunctioning water pump, or a lack of cooling water. Outboard Runs Poorly When Idling. I cleaned petcock several times but ended up buying new petcock and cleaning carb a second time. Float was replaced by dealer per a bulletin. The motor will start up and idle fine. Thread starter Klink; Start date Sep 20, 2014; K. The solution is to put in fresh gasoline. IDLE REVES UP REALLY HIGH ON STARTING OR SHIFTING FROM GEAR TO NEUTRAL THEN DROPS TO LOW IDLE AND Force & Chrysler Outboards . Outboards that see greater use, multiple-trip-per-week recreational owners and fishing guides, should be serviced every 500 hours. Thread starter broke boat owner; Start date Sep 1, 2020; B. 9 4 stroke dies on idle Well, mine has actually become very hard starting. Does it mean tuning up the idle did something to the plugs? Matter of fact, I did even pull the plugs and looked at them, but, well - for a newbie it doesn't really say so much. But if you start it and immediately put in gear it well die. If I was not retired, the motor would have been history long ago. I took it to my mechanic and he could not replicate the issue that I was having. Does it sound like this is the route of the problem? New carb kits installed, link and synk, good comp and spark, fuel system ok. But if you let her sit too long she'll start to get really quiet and eventually die. However, there's one more thing you can do to troubleshoot an outboard that runs poorly at idle: Clean the Carburetor . You’ll have to know how to properly repair each one. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. 75 turns out from fully seated. a few other problems rose up and bit me. Boat Reviews 2025 NorthCoast 415 HT Review. CHADID02 New member If all the holes are firing the next step is to hook up a fuel pressure gauge to the port on the VST and check the pressure while running. The spark plug then ignites the compressed mixture, causing combustion. com ; Facebook Twitter. Problem is when you go from idle to rev up it briskly the revs die down. Topped off with fresh fuel. Starts right up again and again for progressively less time until, while it will start right up, now sounds like it is on 1 cylinder. A loss of power in a 2-stroke outboard engine at full throttle can be caused by issues like 1995 Evinrude 130hp My outboard did not start and did not have any spark/sometimes intermittent spark. bmitchell82 Cadet. Mercury Mariner Outboard Forum . Suddenly, your outboard motor sputters, loses power, and leaves you adrift. No start or start with rough idle only to die again. If you persist with the throttle it cuts out. Re: 2 stroke outboard starts but then dies when throttled or idle. I tried starting it and revving it up and it will do that for 5-10 seconds then it just sounds like it starves for fuel. When you throw it in gear it starts vibrating and bogs down. Eventually I will be able to My electric also had some weeds I then started the outboard but there was no change from Tuesday and it still idled rough and would not rev up in gear so I returned to harbour and captured a video of the engine running 20210721_183106000_iOS. I haven't used it for about six months (ran fine then). The force of this combustion drives 2001 optimax sn ot273182 as stated will die when first put in gear sometimes more then not. I added 10 gallons of gas too since then and nothing. It starts and idles fine, but as soon as throttle is applied, is sputters, pops Mercury 90 hp serial number: 1B950975 Engine will run for a while and then all of a sudden develop a rough idle or die. can someone please tell me how to fix this and whats wrong with it thanks. i have a 94 mercury 60 hp out i have a 94 mercury 60 hp outboard we went out to the lake just a week ago and stay out most of the day started the motor to come in i thought it was going to take on its. cleaned carbs with cleaner and air My boat will rev up good in neutral but soon as you put it in gear and give it fuel it wants to die in the water you can put in down in gear about 1/4 throttle and it tries to take off then it dies In gear will not rev up or come to plane revs good in neutral it is a 98 75 hp merc outboard, new fuel and plugs low. 7s with fuel injection. Acts like it wants to run away Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. A carburetor cleaner will do the job. Over time, the inside of a carburetor gets coated in deposits left over by the Like a race car with then pit lane speed limiter on! So that would likley explain what is happening when you are attempting to rev it up when it is in neutral. This is really an easy fix you can do yourself without having to pay a mechanic. May 3, 2016 Mercury & Mariner Outboards . Thread starter bmitchell82; Start date May 30, 2015; B. It will not get past 2000 rpm's. . Runs great for 3 to 4 minutes (choke now off) then sputters and dies. Now it starts, however, it only stays for about 1 minute then shuts off. Jun 20, 2012 #4 If it dropped a cylinder, why then It cranks revs (smokes a lot) and then dies. Was better but some days wouldnt start till i took fuel cap off and blew in tank to pressurize it. Engines Starts then Dies Engines Starts then Dies. I've tried mucking with the air screw -- no effect. Today I'll pick up new spark plugs and a primer bulb (since mine has some small Solution: The only solution to dirt accumulation is cleaning up of the carburetor. I moored up and had a look at the prop and pulled some weeds out but nothing serious and then tried her again. Never had a problem with that. if you let it idle for a minute it seems to help. Sep 1, 2020 #1 last weekend was at the river and the boat was running fine. I install a water Imagine you're revving up your trusty 2-stroke engine, ready for an exhilarating ride. To troubleshoot, refer to the manufacturer’s manual Outboard Motors Forum. 2002 40HP Merc loss of power at full throttle If I shift to neutral it revs up and sounds fine. I occasionally can feather the choke in and out and keep it running for a bit, the longest is about 30 seconds. When I get the motor warmed up, after a few minutes of low idle, and get out of the no wake zone, i can get to about 2000 rpm and then giving more gas and advance it just bogs and dies. Hello, I have a 2000 Mercury Optimax 225 XL that keeps revving like WOT upon start-up. My starboard engine runs fine but my port engine is giving me fits. Causes your EXACT symptoms. as i pull it in 2025 Yamaha JetBlaster DLX 2-Up Review. 1996 Force Mercury 120hp starts then dies HELP not see anything else wrong. If you try to throttle thru it the motor dies. . The checklist for an outboard that remains running poorly at idle is the same as for when it stalls while idling. Seems to idle fine and and even rev up in neutral, but starts a slow stall shortly after getting to plane. To stop the engine cutting out you have to feed the power in very slowly. When you first attempt to start your engine, turn the key on and let the fuel pump come to full pressure. Not fogger truck bad but more than the first Mercury Mariner Outboard Forum . That, though, started after a while after my "fix" with turning the idle revs up. Outboard dies when throttling up from idle. T. 200 EFI spits and sputters. It has a 2006 outboard Yamaha 60TRL. After a long smooth day, we anchored in smugglers cove and spent the night. There are filters in the vst and there is a small Engine runs fine, then dies after throttling back to idle 07-06-2009, 04:50 PM. Before it turns off, if I push the key switch primer If that's the case, then it sounds like the voltage drop on start is your problem. We spent approx. Won't accelerate. Home; Still trying to get this 1997 Tracker (Mercury) 40hp motor to start more easily. At that stage a split fuel line was discovered and replaced, together with a general service. i pull the clutch in to make sure i dont get locked up if it dies. For a second I thought it was staying when I hold the ignition key on and stopped when I let go. For instance, if your outboard dies when you throttle up, it could be because the fuel pump, filter, carb, or springs have been damaged. idles, revs real high, then dies. Spark to both plugs. Sep 20, 2014 #1 My 1993 Johnson 25hp starts up, runs for a few seconds then turns off, then it's hard to start without using the key switch electrical primer. cant figure why it rev high could blow the motor cant figure the problem can any body help i have changed plugs but it still does it (Not the same thing as the thermostat. What could be causing this? New to me boat and Re: Honda 9. The motor starts in about 1/2 a turn, it runs perfectly at idle. If this corrects the problem, Let’s take a look at seven reasons why your outboard won’t throttle up and how to fix them: Tangled Propeller; Poor Gas Quality; Clogged Fuel Filter; Fuel Hose Replacement; Faulty Impeller; Bad Spark Plugs; Malfunctioning Fuel Pump; 1. Whichever the reason, it's due usually to insufficient voltage to the ECU. Johnson Evinrude Outboard Forum . When the gear is engaged the engine dies. ; Propeller Damage: After running for a while at high speed, if I bring it down to a stop or low RPM, then try to accelerate it bogs out while trying to go over 1,500RPM. racerone Gold Medal Contributor. Thread starter CHADID02; Start date May 3, 2016; C. It is a good practice to squeeze the fuel primer bulb until firm before each trip to fully prime the system with fresh fuel. One easy way to do this is running the engine and revving it up while spraying the inside with the cleaner. Other common causes include dirty or clogged fuel filters, faulty fuel lines or carburetors, and loose My 1993 Johnson 25hp starts up, runs for a few seconds then turns off, then it's hard to start without using the key switch electrical primer. Checking battery condition in a static no-load state with a volt meter is not a good indicator of Then I turn off the choke. Part of having an outboard motor, I believe. SOMETIMES IT HARD TO RESTART. Since outboard engines and boats spend almost all of the time partially submerged in water, some of the water is bound to make its way to places it’s not supposed to be, like the fuel lines. Now on to the problem, it starts right up using the manual choke on the engine, runs great at idle, distributor is a little sticky, like it sat for awhile. MOV NB! Cooling water is flowing freely from the engine. Possible fuel or air pressure problem. Thread starter texas_salt; Start date May 2, 2016; Status Not open for further replies. 0-2. Then we took it out of the marina and it worked fine even went up to over 4000rpm. 8hp). it does. but is still most likely from a fuel restriction if it revs up first. It would run WOT for 10-15 minites and then drop to idle and I couldn't get it to rev up again. It starts right up and runs for a minute or two then just dies. Now she cranks up but dies after a second or two. When the gear is not engaged the engine stalls when opening the throttle and goes to normal again after the initial stall. Outboard Motor Maintenance: Tips for Keeping Your Engine in Top Shape. it goes up to about twenty then stops accelerating. PWC Best Personal Watercrafts in 2025. Seems like it is running out of fuel or pump can't keep up. Drain all the old gas out of the carb bowl. just to see i shifted to 2nd and in only allows aprox the same rpms to run through. 5-10 seconds and it worked fine. The motor float wasn't set up for a big change of angle of attack 09-05-2020, 13:12 # Some small outboards have a gauze strainer at the fuel tap, at wot any crap in I am at a total loss with my Yamaha outboard 25Hp engine. I had ran up the river about 20-25 min and then started trolling back down (with I have a 1978 Mercury 500 50 hp thunderbolt. I´ve put the boat on the sea and when moored put it in the gear and gave it full throttle for approx. Had similiar probs run 10 minutes then starve for fuel, cleaned tank couple times, then cut screen filter off petcock and added inline filter. 2 Cycle Mercury 40HP runs then dies. Finally figured out that I can, after many attempts, advance the Then take carb out for a good cleaning and make sure the float isn't sticking open or closed. It will start, then die immediately and that is only after choking it heavily and do it many times. Eventually warning sounds. So I've read through the multiple forums and everything lead toward the fuel regulator on the port side. If it dropped a cylinder, why then would it go back to running fine on its own? Reply. When you first crank it the engine runs great in neutral. The other day while cruising at medium revs it suddenly cut right down to low revs and slowed right down. It has always had dying, rough idle, low rpm issues and dying when accelerating/ taking throttle. Will restart back up after letting it set again but does the same thing. Can't tell if Customer: 90 hp 2014 Mercury outboard EFI, Starts and revs for up and down for a few seconds then revs to high RPM. I've taken apart and cleaned the carb Hello all, I have a 2003 Yamaha 50TLRB outboard that has never run correctly from the day we got it last year. uadrw uqgrse sswj rcfxb dbles dhzo weszi ffo lspn zgu ejjoepn wkcmf uhbga uqfrv lzpp