2 stroke outboard runs then dies

Salty John said: Honda BF8, 4 stroke outboard. Ran fine but then, after not being run for three months, runs rough. It starts, idles somewhat roughly, dies after a few minutes. Under load it will run for a couple of minutes, then dies. Restarts easily - one pull - but then runs a couple of minutes and dies. I suspect a gunged up carburettor.

Using new gas and new Quicksilver 2-stroke outboard oil with 50:1 mixture per manual. Played around with mixture screw (tightened screw to seat, and backed off 1 1/2 turns and more). Engine will start easy but runs for only 5-7 seconds or so. Opening and closing the choke and moving throttle seem to prolong the run a few seconds, but it still ...Yamaha 8hp 2 stroke running rough & stalling. 12-08-2008, 05:02 PM. Hi a newbie to the group, We have a Yamaha 2hp 2 stroke Model 8MWHS. Purchased used about 5 years ago I think it must be at least 15 years old. During the past few years the engine started running rough and stalling at times. We changed the plugs and it made a world of difference.06-26-2018, 04:52 PM. I have a question for you guys about a boat I recently purchased, a 2002 Boston Whaler, with a 2003 Yamaha 90hp 2 stroke Outboard. The engine ran great the first few times I had it out, but always seemed sluggish, I was getting 4600 rpm and 36 mph at WOT, but it would take a while to get up there, it didn't seem to be very ...The fuel efficiency of a 4-stroke motor can be 50% better than that of a 2-stroke motor with the same HP. As for environmental concerns, 4 stroke outboards produce far less harmful emissions, which can be as much as 90% cleaner than those from a similar sized 2-stroke motor. Being more fuel efficient means less fossil fuels are burned, making ...I have a 2002 Mercury 60 HP 2 Stroke engine that starts fine idles fine runs great up to a certain RPM and then starts to sputter and won't go any faster, top speed on my boat is 26 MPH and will only go 12 MPH and the starts to sputter. replaced the fuel pump went thru the carburetors still the same results.

Jul 2, 2003 · Apr 28, 2002. Messages. 7,518. Jul 2, 2003. #2. Re: Mercury 115hp idles fine, dies when put into gear. When you put it in gear try squeezing the bulb. If it keeps running that would point to a fuel delivery poroblem. If so I would start by rebuilding the carbs.25 yamaha 4 stroke starts easy, idles, but dies upon increase idle. 03-30-2014, 06:03 PM. Problem started as loose fuel hose on backside where gas enters motor before fuel filter. . .bought new hose. . .noticed a kink in fuel line just in front of engine and replaced it and fuel bulb. . .after plugging fuel bulb into hose leading back to tank ...Jun 4, 2009. #1. Just bought a 1993 40 hp evinrude fixer upper (sat for 3 years). Has great spark, kicks over (some times), runs for a few seconds then dies. Thought it was just bad gas. Put a portable tank with new gas still does the same thing. Primer bulb gets soft after running, and feels like air bubbles when i pump it back up.Mercury 30hp EFI 4 stroke. Runs for about a minute then dies. Used to not restart until you let it cool for several hours. My customers took it to a master Mercury technicians shop who replaced the fuel pump. ... I have a 2005 Mercury 8.0HP 4 Stroke Auxillary outboard as a trolling motor, it starts and runs perfectly for about 15 minutes then dies.It's a Suzuki 4-stroke 2.5 HP (yes, everything is really tiny) from 2008 that came with the boat and sat on the rail idly for 2-3 years, so of course the petrol had gone off. The ignition also had problems, which are sorted now after replacing the all-in-one ignition module. Spark plug is also new. So now it starts, but only runs for a couple ...Mercury & Mariner Outboards . 2 Cycle Mercury 40HP runs then dies. Thread starter ... . 2 Cycle Mercury 40HP runs then dies. Thread starter bmitchell82; Start date May 30, 2015; B. bmitchell82 Cadet. Joined Apr 25, 2015 Messages 9. May 30, 2015 #1 1998 40 HP Mercury 2 cycle oil injected motor. SN: 0G650371 I can get the boat to start …Apr 17, 2012 · 429 posts · Joined 2011. #4 · Apr 17, 2012. tried it again to move it after it sat awhile. started up once. idled as long as i wanted. i hit throttle and it died. did that same thing 1 more time. then it started and died by itself as described above. then proceeded to not start. battery charger made no difference.

615. Mar 18, 2009. #5. Re: help 30 hp 2 stroke dies after warm up. First, you should see a "pee" stream comeing out of the engine cowling in the rear. IF you don't your WP or cooling system has problems that will cause SERIOUS damage if you continue to run it. Assuming you see the stream, here is another test.- Born Again Boating. Why Does My Outboard Die When I Put It In Gear? A common problem that we see a lot of, with Two Stroke Outboard Motors is that for some reason …1) Fuel Filter - I cleaned the fuel filter by unscrewing it and blowing out the bits of dirt in the container and on the filter. 2) Pilot Screw - Then I removed the pilot screw, cleaned it off, sprayed carb cleaner into the hole and replaced it. This seems to have been the most significant part of the fix.I have a 1994 or 95 150 hp Evinrude outboard that shuts off after about 10-15 minutes. It fires just fine when cold but after running a little bit it just completely shuts off, no sputtering or anything just dead. It will not restart for …

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Starts then dies. 5 hp mercury motor starts then dies. getting fuel carb looks clean. ... I have a 2000 40hp mercury remote 2 stroke outboard motor that will not idle in neutral. ... 1979 two stroke 175 horse v6. runs for about 1/2 mile on the water then seems to run out of gas. will not start back up. runs fine in the driveway. carburated ...Jul 24, 2021 · Fuel pump issue. Fuel filter issue. I have not tried squeezing the bulb after it starts to see if that helps keep it running, but I'll give that a try next. Note: the outboard is "pissing" water when it starts so probably not an overheating issue. Looking for any other advice .Re: Root cause of Mercury 2-strokes' rough idle) true. The compression readings aren't perfect: the lowest reading was 103psi in one of the cylinders when measured about 2 years ago (the engine hasn't done more than 25 hours since then) but I don't longer have the readings in the other 2, I think they were around 110psi, so will …The first thing to do is to run the engine off a portable tank using a different fuel hose. If the problem goes away, the issue is your fuel flow. The possibilities are: 1. Your tank vent is blocked. Test as suggested above by loosening your filler cap.

Step 3. If the engine stutters and dies or fails to start, check to see if there's enough fuel in the tank. Ensure that the fuel lines are free of kinks and leaks and the connections are all secure. Squeeze the rubber fuel primer to check for any resistance. If you feel resistance, it could mean that fuel is not reaching the engine and the fuel ...06-26-2018, 04:52 PM. I have a question for you guys about a boat I recently purchased, a 2002 Boston Whaler, with a 2003 Yamaha 90hp 2 stroke Outboard. The engine ran great the first few times I had it out, but always seemed sluggish, I was getting 4600 rpm and 36 mph at WOT, but it would take a while to get up there, it didn't seem to be very ...01-27-2007, 05:56 PM. we have a 13 year old yamaha 175. after running for about 10 minutes, engine bogs down to low rpms, sometimes stalls. runs perfectly up to that point, up to full wot rpm. comes back to higher revs briefly when we pump the bulb. replaced primer bulb, external water separator filter, and checked fuel lines for cracks. any ...When 2 stroke engine troubleshooting and the engine is flooded, you want to spin the engine over fast with the throttle wide open several times. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly.Posts: 18. Re: 2 stroke outboard starts but then dies when throttled or idle. Check for air leaks in the fuel supply hose from portable tank to the motor. They’ll either be at the attachment points or maybe a pin hole in the rubber tubing. That solved my similar problem - then engine ran great! 30-07-2021, 07:17.An ignition coil (or coil pack) creates the high voltage needed by your spark plugs to create a spark. When the coil is beginning to fail, the spark it produces may be weak, or it may produce a spark intermittantly. Both scenarios can lead to a situation where your engine runs for a short period, but then dies when under load or at higher RPMs.Engine Running then Bogging Down (Evinrude ETEC 25hp Tiller) My motor started doing this the other from not doing it for several weekends. I would run full throttle for awhile then the engine would bog down to idle with the throttle wide open. I would shift back to neutral, back to forward, turn the throttle up, and it would run for about half ...I know of a late 90's ocean pro 90 hp 2 stroke that the guy says runs, but has a knock. ... or repair or to run unitl it dies....seemingly good price and it comes with guages, the binnicle controls, and cables. ... If you run it until is quits then who knows. B. bob johnson Rear Admiral. Joined Feb 25, 2009 Messages 4,304. Mar 25, 2009

3. Spark test. Before doing the actual test, install new spark plugs. Next, get a timing light and run the engine and hook the timing light up to each plug wire one at a time and see if the timing light flashes or not. Flash means the engine is sparking when running, no flash means no spark.

7 posts · Joined 2009. #1 · Jan 4, 2010. Help... my 70 hp johnson outboard starts every time but immediately dies within 2 seconds. It can do this all day long. You prime it, raise the throttle assist, choke it, crank it, it fires up instantly, then immediately and mysteriously dies. Good fresh gas and the carbs recently cleaned.Re: 2000 Evinrude 15HP 4 stroke runs great for 10 minutes, then dies. Forgot to add that the motor now will completely die after 10 minutes. Previously it would miss-fire and degrade, then quite. Now it shuts right off. It will restart after a couple of minutes, but will only run for a few seconds before dieing again.Power stroke ignites the compressed fuel for power; Exhaust stroke releases burned gases; By separating intake from exhaust, four stroke engines prevent emissions and don't need mixed gas and oil. But more strokes mean less power density. Key Differences Between 2 and 4 Stroke Outboards. Power-to-Weight Ratio. Two stroke engines generate ...Stroke is a leading killer, and one of the pharmaceutical industry's greatest failures. An audacious Canadian doctor hopes to change that. There are roughly 100 billion neurons in ...540. May 28, 2010. #3. Re: Mercury 25HP Wont Start. Replace the fuel lines, tank to motor line, and rebuild and clean the carb with compressed air. All pretty cheap. THEN, perform a compression test on the motor to make sure that starting fluid did'nt kill it.Jul 25, 2019 · 6hp 2 stoke, bogs down and dies at low revs/throttle. 07-25-2019, 01:38 PM. I spent the last couple of hours taking apart and cleaning the carb on my Yamaha 6hp 2 stroke. The engine was running perfectly until a month or so ago. Moving the throttle to the start position the engine might turn over a couple of times before dying.Possible Cause: Incorrect fuel/oil mixture. Solution: Ensure that you’re mixing the proper ratio of gasoline and 2-stroke oil according to the manufacturer’s guidelines. Possible Cause: Damaged or leaking gaskets. Solution: Inspect the engine’s gaskets and seals for signs of damage or wear. Replace them as necessary.

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YZ125 Bog then dies at wide open. Bog then dies at wide open. Hey Everyone, I've dug through a bunch of topics looking for a solution to an issue that just started this past weekend. All of a sudden when I crack the throttle wide open it bogs down and dies. If I roll the throttle on smoothly I can ride with no issues.We hope this read offers you valuable insights into why an outboard motor may not be running at full power. The common culprits discussed below include:-A spun propeller-Boat propeller entangled with debris-Fuel line air leak-Corroded spark plug wiring Additionally, apart from the question of your engine operating at full power, we discuss what might be causing acceleration hesitation.Step 3. If the engine stutters and dies or fails to start, check to see if there's enough fuel in the tank. Ensure that the fuel lines are free of kinks and leaks and the connections are all secure. Squeeze the rubber fuel primer to check for any resistance. If you feel resistance, it could mean that fuel is not reaching the engine and the fuel ...May 5, 2011. #6. Re: engine runs on the muffs but not in the water? (Engine Won't Start or Hard Starting In Water) (Joe Reeves) The Evinrude and Johnson engines, starting in 1973, have what is called Magneto Capacitance Discharge ignition, self contained, not dependent on battery voltage. The engine must turn over at least 300 rpms in order for ...I have an 8hp Mercury 2 stroke outboard for my dinghy and it has generally been very good, but recently after having just filled the gas with 97 Premium (at Valero) and adding the appropriate oil, it is now not running. This engine has never idled that well, but previously, as soon as it starts if I apply some throttle it is good to go. Now the exact …The Stroke Minority takes an active role to advocate minority issues related to the Council's involvement in the scientific and lay communities To take an active role to advocate m...Tilt your lawnmower up and put a heavy object on the handle. This should hold it up. Allow the oil to go to other parts of the engine; leave it for about an hour. Then run the machine and see if it runs for a while without dying. If this happens, then you simply have too much oil.The first thing to do is to run the engine off a portable tank using a different fuel hose. If the problem goes away, the issue is your fuel flow. The possibilities are: 1. Your tank vent is blocked. Test as suggested above by loosening your filler cap.Disconnect the fuel line from the engine side of the bulb. With the arrow pointing to the side where you pulled the hose off. Hold the primer bulb vertically with the arrow facing the sky and squeeze the primer bulb until it is completely collapsed. Then, stick your finger on the hose barb. Let go of the primer bulb. ….

Nov 11, 2008. Messages. 328. May 23, 2012. #6. 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. Been doing some archive search and been reading about coils possibly …Yamaha 2 stroke outboard motor loses power if it has problems like faulty carburettor, bad fuel to oil mix ratio, use of contaminated fuel, bad fuel line, fouled plug, bad ignition coil and overheating. when any of these problems occur in the two stroke Yamaha outboard motor, it will drastically reduce the power output of the outboard motor.Mercury 30hp EFI 4 stroke. Runs for about a minute then dies. Used to not restart until you let it cool for several hours. My customers took it to a master Mercury technicians shop who replaced the fuel pump. ... I have a 2005 Mercury 8.0HP 4 Stroke Auxillary outboard as a trolling motor, it starts and runs perfectly for about 15 minutes then dies.In our previous blog, we discussed the diagnosis of Moyamoya disease using medical imaging such as CT and MRI. Patients with Moyamoya disease often have a higher risk for stroke du...01-27-2007, 05:56 PM. we have a 13 year old yamaha 175. after running for about 10 minutes, engine bogs down to low rpms, sometimes stalls. runs perfectly up to that point, up to full wot rpm. comes back to higher revs briefly when we pump the bulb. replaced primer bulb, external water separator filter, and checked fuel lines for cracks. any ...Then, if your engine is under 25HP, you may be able to use the emergency cord to pull-start. It's possible to do this with up to a 50HP engine, but be aware that the higher the HP, the more difficult this will be. If this works, the battery is likely the issue. You may need to replace it. Reasons Your Mercury Outboard Still Isn't WorkingThen, if your engine is under 25HP, you may be able to use the emergency cord to pull-start. It's possible to do this with up to a 50HP engine, but be aware that the higher the HP, the more difficult this will be. If this works, the battery is likely the issue. You may need to replace it. Reasons Your Mercury Outboard Still Isn't WorkingYour outboard may be stalling & running out of fuel due to three issues. Either the lift pump has failed, the boat is out of fuel or there is an air leak or blockage somewhere in the fuel lines running fuel from the tank to the engine. There are several methods to troubleshooting a stalling outboard engine. We explore the three big issues that ...The motors are 2000' but have very low hours. One motor runs perfectly. The other starts but runs for about five seconds and then dies. Fuel filters are new. Fuel is fresh - the other motor runs fine. Fuel pressure is fine. I am having a heck of a time getting the mechanics to free up to take this one on.Diagnosing High-RPM Power Loss. VST pump inlet filter. Service during regularly scheduled annual checkups or every 100 hours of operation is recommended for outboards in normal recreational usage, annually or 500 hours for fishing guides or multiple-trip-per-week recreational fishermen. Spring is well underway and we are about to roll into ... 2 stroke outboard runs then dies, 5 Reasons Your Toro Snowblower Starts and Then Dies. 1. Bad Fuel. 4-cycle (4-stage) Toro snowblowers require unleaded gasoline with an ethanol content of 10% or less. 2-cycle (2-stage) Toro snowblowers require unleaded gasoline with an ethanol content of 10% or less mixed with 2-cycle engine oil., I have a 1990 2-stroke electric start outboard that for some reason it will only run when in full choke. When I take it off choke it sputters and then dies, like it does not have enough air. After about 30 minutes on choke it will also start having power problems. I cleaned the carb. and it looked fine., 8 posts · Joined 2010. #1 · Jul 5, 2010. I have a Yard Machines by MTD lawn mower. I pump the primer 5 times, and it starts every time, but just as the engine is reaching normal rpms, the engine dies. It only runs for 1-2 seconds then dies. I changed the air filter and put a new plug in it, and it still has the same problem., Hello, new to the forum and the world of outboards. I have a 2005 Merc 90 hp 2 stroke outboard that has always ran well until recently. It starts good and will take off running good for maybe 15-30 seconds running about 4000 rpms. Then it starts losing power and acts like it is starved for fuel. The rpm will surge and drop between 3000 and …, 2. Put in forward gear 3. Runs fine for a few seconds (even seems to accelerate normally if I open up the throttle) 4. Red light suddenly turns on at the same time that it starts running super rough 5. Runs rough for about 5 minutes, not letting me go very fast, but still pushing the boat a bit 6. Turns off 7. Rinse and repeat..., We hope this read offers you valuable insights into why an outboard motor may not be running at full power. The common culprits discussed below include:-A spun propeller-Boat propeller entangled with debris-Fuel line air leak-Corroded spark plug wiring Additionally, apart from the question of your engine operating at full power, we discuss what might be causing acceleration hesitation., Mercury 2-stroke 125 hp stalling issues at idle. Alumacraft1. 04-21-2012, 09:19 PM. All, I am having some issues with my Mercury motor. I bought a new to me/used boat in february of this year. It is a 1996 alumacraft trophy with a 1996 Mercury 125 2-stroke motor. The owner had to replace the impeller, so that is brand new., Causes for Lawn Mower Starting then Dying. If your lawn mower starts, runs briefly, then dies these are the four most common reasons that's happening in my experience: Dirty carburetor / clogged carburetor bowl. Old gasoline that has gone bad. Dirty or defective spark plugs. Too much oil in your resevoir., Posts: 102. 2 stroke outboard starts but then dies when throttled or idle. I have an 8hp Mercury 2 stroke outboard for my dinghy and it has generally been very good, but recently after having just filled the gas with 97 Premium (at Valero) and adding the …, Old or Flooded Engine. If your 2 cycle engine starts and then stops running, then the engine may be flooded. In order to tell whether or not the engine is flooded, remove the spark plugs. If the spark plugs are wet, then the engine has flooded. If your 2 cycle engine is flooded it may be probably dead and the gaskets need to be replaced., Check out these 10 simple solutions for the most common engine breakdowns. Running out of gas. Boat engine is sputtering and losing power. Engine won't start or turn over. Boat engine is overheating. Boat motor stopped suddenly. Vibration from the engine prop. Engine won't shift into gear. Trim is stuck on the engine., Mercury & Mariner Outboards . 2010 90HP EFI 4-stroke Merc dies after throttle and runs rough after warm. Thread starter ... . 2010 90HP EFI 4-stroke Merc dies after throttle and runs rough after warm. Thread starter jeepdude2; Start date May 18, 2017; Status Not open for further replies. J. jeepdude2 Recruit. Joined May 18, 2017 Messages 3. May ..., In reality, this problem can be caused by a variety of issues. Everything from fouled or corroded spark plug wires to debris in the gas can cause sputtering or loss of power. The first step is to identify what the cause of the problem is. The easiest way to do this is by eliminating the simplest explanation first and working your way outward ..., 2-stroke bogging. 03-03-2016, 09:56 AM. I have a 2004 150 yamaha 2-stroke that starts and runs fine but will bog if you try to push the throttle over ~3200rpm. Let me put down a quick timeline. 1 boat purchase at auction runs ok but bogs at 3krpm. 2 mechanic tune up same thing. 3 mechanic rebuild carbs. 4 I receive boat install carbs same thing., the common problems with Mercury 115 2 Stroke include, Not Running on 4 Cylinder. Intermittent Beeping. 2+2 Carburetor problems. Outboard Won't Throttle. Stroke Not Peeing. Misfire Problem. motor won't get past 3000 RPM. In this article, I've explained all these Mercury 115 2 stroke Problems with proper solutions., The problem is at full throttle opening. The motor will run for about 10 secs then dies. Idles ok and part throttle is ok. Starts again ok. To me it sounds like fuel starvation at full power. I've changed the line from the tank to the o/b. Cleaned the coarse filter in the tank. Changed the in-line filter., A fouled (or non-sparking)spark plug has got to be the most common cause of issues by far with these older outboards. Besides being out of fuel, it's the FIRST thing you want to check. If one plug feels cooler than the other after some run time, that's your culprit. #2 is a stuck/shot water pump impeller., 5. Apr 16, 2001. #1. We have a 98 25hp Evinrude that has an annoying habit of intermittently bogging down or losing power when we run at full throttle. One of the problems is that it is completely unpredictable as to when it is going to happen. When it happens we stop the motor take it out of the water for a minute or so, start it back up and ..., Here’s a run-down: Make sure that the kill cord is attached. Because your Suzuki outboard won’t start in gear, ensure the engine is in neutral. Inadequate fuel supply is a common issue, either from pinched hoses or a lack of fuel in the gas tank (s). Make sure that there’s no water in the fuel lines. Perform a visual inspection in the ..., You might try running Sea Foam through it before spending a lot of money or time on a manual clean out or rebuild. Put a pint in 3 gallons of fuel. Run the motor for 15 minutes, then let it stand for 15 minutes. Repeat that cycle 8-10 times. That will clean out any carbon buildup in your motor and should help immensely., Yamaha 2 stroke outboard motor loses power if it has problems like faulty carburettor, bad fuel to oil mix ratio, use of contaminated fuel, bad fuel line, fouled plug, bad ignition coil and overheating. when any of these problems occur in the two stroke Yamaha outboard motor, it will drastically reduce the power output of the outboard motor., Feb 1, 2009. #3. Re: 9.9 only runs with choke on. when you pull the choke on, what you are in fact doing is decreasing the amount of air, and therefore increasing the amount of fuel so, as mentioned, you have a dirty/blocked carby, or quite a bad air leak in the manifld/gasket more than likely carby rebuild though, pretty simple thing if you ..., Jul 3, 2012. #7. I had a similar problem on my 1986 25hp. I wasn't going to play guessing games so I replaced the fuel pump, easy fix, gas filter, easy fix, I replaced the primer bulb because mine was old and beginning to dry out and I replaced the gas cap on the tank because it was pretty rusted and I think may have been causing a vacuum in ..., Sep 10, 2013. #5. Re: Mercury 50HP 4 stroke stalls at low speed. There is no fuel pressure sensor. The computer cannot tell a weak fuel pump from a failing primary fuel pump or a dirty VST filter sock. Get a fuel pressure gauge and connect it to the fuel pressure port., Emrah, There could be a partial amount of fuel entering the carbs. When you run it for 20 minutes you use up all the fuel. Then when it sits for two minutes the bowls fill up again. On each carb float bowl (on the right side) there is a little allen screw. When it dies, try loosening the one on the right carb., 11. Jul 16, 2012. #6. Re: Motor Shuts Off While Running. Well it's back at it, I have a 2005 Mercury 60hp 2-stroke 3 cyl. outboard that cranks and runs fine at idle or low rpms but when I increase throttle and boat to plane it stalls and shuts off, then is very hard to crank, if it cranks at all. I have replaced all fuel filters, hoses, bulb ..., 3474 posts · Joined 2006. #1 · Jun 4, 2014. For the past 3 weeks or so my Tohatsu 9.8 2-Stroke outboard has been acting up and I'm not sure what could be causing it. When cold (more than 1 hour after the last run), I pull out the choke and it starts on the first pull and I immediately push back the choke. The engine idles nicely, and I give ..., Yamaha VZ150TLRY starts and instantly dies. Last night I changes the VST filter and paper filter in the clear fuel filter on my 2000 Vmax 150 HPDI. I changed it after this past Sunday was on the water and at high rpm's the motor started surging and doing the fuel starving thing. So I ordered the filters and last night went ahead and put them on ..., The adjustment on the 2005 Yamaha 90 2 stroke needle valves is 1 1/4 to 1 1/2 turns out from fully seated. When mine starts sneezing at idle I take the needles out one at a time a squirt some carb cleaner in the passages and blow them out. Another problem with the Yamaha carbs is if they sit for a long time, the floats drop and the needle ..., When 2 stroke engine troubleshooting and the engine is flooded, you want to spin the engine over fast with the throttle wide open several times. You should start to hear it pop, just keep pulling or kicking and holding it wide open until it starts, then rev the engine a bit to clean it out and keep it running, then warm it up properly., Idles smoothly and sounds great in neutral, when I shift into gear the engine begins to stall. If I advance to about 1,000 RPM, engine runs in gear. After about 1,400 RPM motor begins to bog down and stalls. If I pull it back to 1,000 it will keep running. If I go back to neutral it keeps running. It sounds better in neutral than in gear., Jul 1, 2011. #2. Re: Mercury outboard dies at idle... Eduardo said: ...and also in forward gear at idle. This happens only after I run the motor at high speed. Then when I put it in neutral or forward gear in idle, it dies not right away but a few minutes later. The only way to start it is if I push the ignition switch to choke., 2000 Yamaha 100 hp 4 stroke engine outboard. Set for 2 years and then cleaned up as far as line filters and tanks. Will only run for 1-2 minutes and then dies. will run as long as you pump the primer … read more