2 stroke outboard runs then dies

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 acting ...

81BASSTRACKER. New member. Sep 11, 2023. #1. I just bought this older boat and it runs pretty good. the issue I'm having is that at some point during the day while I'm cruising on plane it just totally cuts off. it wont start back up but it sounds like it wants to.,.. it turns over. so i start trolling back to the dock... after a while it will ...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.Re: My outboard johnson starts and idles fine then stalls when put in gear. What woul i had this problem with two separate johnson 85's. turned out the timer base was not advancing when the butterflies on the carbs were opening. this johnson is a little older than yours but most likely works on the same premise.johnson timer base - YouTube watch the video and see what i am talking about. i ...Re: 40 HP Mercury stalls when given throttle #2. If he ran it out of gas it's possible he sucked some deris from the bottonm of the tank into the system a good carb cleaning might be in order. As for the fuel pump I had a similar problem with a 70 horse and a fuel pump rebuild ($11 kit about 15 mins to install) made the thing run like new again.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. Before it turns off, if I push the key switch primer in, it keeps running, as long as I keep doing it. After it turns off, I let it sit for 10 minutes, and she starts right up without ...

90hp 2-stroke Yamaha, loss of power after 15 sec. on 3/4 throttle. Starts and idles fine, put throttle 3/4, then to full, it takes off normal, good jump..., then 10 to 15 seconds later, it slows down and runs rough, takes about 15 seconds to recover, then idles great again, put into gear again, same 3/4 throttle and then to full throttle, after ...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.Started and choked it several times, it will run for a short time and then dies like it is starving for fuel. ... Outboards won't run with it easily, and newer 4 cycles are the worst. 15-10-2015, 10:01 #13: skipmac . Senior Cruiser . Join Date: Oct 2007. Location: 29° 49.16’ N 82° 25.82’ W. Boat: Pearson 422. Posts: 16,306 Re: 15 hp Mercury 2 stroke …12. Aug 3, 2010. #2. Re: Honda 9.9 4 stroke dies on idle. Today I drained the carb by opening the drain screw - and even pumped a little gas through with the primer pump - that's what my mechanic told me to do - didn't do a bit of a difference. I also took a little test trip going for about 10 minutes on full throttle.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 until you locate the issue. The most obvious answer is fuel.

May 2, 2012 · 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.Posts: 104. Re: Mercury 2.2 hp outboard - Dies after 5 mins. This is almost bound to be a fuel related problem. Firstly eliminate the easy issues to check. (1) there is plenty of fresh fuel in the tank (i.e. and no water). (2) is the vent working properly (you can release the main filler cap as engine faulters to check this).VERY intermittent problem continues for over a year, can't seem to identify the problem. The engine is a 2017 Mercury 150 4-stroke mounted on a Tracker boat. The engine has 240 hours on it and the problem started occurring at about 170 hours. Motor runs great most of the times, however it intermittently begins to miss and sputter."Have a 1980 model Johnson 70h "Have a 1980 model Johnson 70hp. It starts right up and runs for a minute or two then just dies. Will restart back up after letting it set again but does the same thing. NOt fuel related dies, just shuts off like you turn the key off. Never had any problems...

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27. Aug 28, 2005. #1. Basically my 1996/1997 60hp is cutting out and refusing to restart after being run for a while. I was out and cruising along at about 25knots and I slowed down to stop and put it in neutral and it died and then refused to restart. Had to get towed in. Took it home and cleaned all the fuel system right thruogh and the carb ...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 ...01 - Tecumseh Small Engine Carburetor. The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine ...Tweet. #1. Yamaha 130 2 stroke running rough at low speed. 04-21-2023, 06:57 PM. I have a 2000' 130 2 stroke engine. It runs very poorly below 2000 rpm but runs great above that point. I am thinking it is a voltage problem stemming from a bad stator or Pulsar coil. I have been told this unit has a separate section for low RPM range and high rpm ...

I think its a good idea to install inline fuel filter on outboards & use a filterfunnel when filling. 08-05-2020, 18:52 #11: Bill O. ... Tohatsu 2-stroke dies shortly after running at WOT, hard to restart ... Tohatsu 5hp 2 stroke runs fine for 20mins then quits and won't restart! sharpey: Engines and Propulsion Systems: 27: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.8,646. Sep 5, 2006. #2. Re: 1993 25 hp mercury runs but then stalls and won't start. My guess is it's flooding. But instead of the shotgun approach, why not troubleshoot logically, one step at a time: First, compression test. Report the results. Next, determine for yourself whether a cylinder is dropping:Tweet. #1. Yamaha 15 hp two strokes dies at low rpm. 03-07-2015, 02:57 PM. I had my Yamaha 15MSHU two stroke overhauled last year. The first time I used it in December it started on the first pull and ran perfect. In February I went to use it and it would only start at a very high RPM setting.Jul 2, 2010. #1. My 2003 9.9 4 stroke idles fine both in gear and in neutral. As soon as I try to advance the throttle a bit it dies. If I pull the choke on, then advance the throttle, it will increase in RPM but then start running rough until I throw the choke off, then it will die unless I throttle back immediately after taking the choke off.I have a 2005 Mercury 4 stroke outboard that dies when I attempt to idle, or when I am going at a very slow speed. ... 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 motor. have replaced filter and fuel flow ...Jul 25, 2021 · 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.Jun 24, 2021 · Faulty Impeller. Bad Spark Plugs. Malfunctioning Fuel Pump. 1. Tangled Propeller. If your outboard motor will not throttle up, the issue may be as simple as a tangle. Debris such as fishing line, excessive seaweed, beer can rings, or nearly any other material can wrap around the propeller and its spindle.I have just purchased a second hand 2003 2 Stroke Johnson 8hp outboard. Perfect condition, clean almost new (looking) When cold it starts and runs fine. When hot it will not idle and just cuts out. It is then impossible to restart it until it has cooled down to cold! Today (we are in spain) we ran it for 5 minutes at full throttle, it was not ...May 15, 2006 · 26. May 15, 2006. #1. I have a 1996 Mercury 115 ELPTO that runs perfectly. The problem is that when I am running at full throttle the engine suddenly dies. It doesn't sputter at all. It just dies. Then I can fire it right back up and it will do the same thing again.

Jun 25, 2013. #2. Re: Runs Great. Then Won't Start. Next Morning Starts Right Up. Pull a plug wire off when its not starting up and check for spark with a screw driver, you just stick the screw driver usually a phillips fits nicely, in next to the contact, hold the screw driver 3/8 inch from the engine and crank the engine over, you should see ...

999. Nov 26, 2017. #3. Your problem has been going on for two years. If you would bet your life the fuel system is perfect,then. It's a wire, just a guess, anything this weird and long is usually a wire corroding almost all the way through in a wire connector. Pull all wires that go into a wire connector very hard.And,Yamaha 40 hp 2 stroke - starts, idled shortly, then dies. I recently purchased a 15 foot whaler with a 40 hp 2 stroke Yamaha outboard. The previous owner had it regularly serviced and hadn’t shown an issues until today. I was out with a buddy today and it …Re: runs for a few seconds and stops. PLEASE HELP. Run the engine until the problem occurs, hook up a portable tank, with an outboard style gas pump ball in the line. Pump the ball and see if you can either, get it to stay running, or start after it stalls. Also try to install the ball in between the boats fuel tank and the fuel pump.Engine stalls when put into gear. Outboard stalls when accelerating. Outboard stalls at full throttle. Outboard stalls at idle. Before you begin to troubleshoot the motor, ensure there is no self-diagnostic code indication. Also, download the service manual for your exact model, you’ll need it. Turn the ignition switch “ON”.8,646. Sep 5, 2006. #2. Re: 1993 25 hp mercury runs but then stalls and won't start. My guess is it's flooding. But instead of the shotgun approach, why not troubleshoot logically, one step at a time: First, compression test. Report the results. Next, determine for yourself whether a cylinder is dropping:27,259. Sep 22, 2016. #9. If the boat runs fine at high speed for a time and then bogs down while still running at high speed, it is likely a heat related ignition issue. If she runs fine at high speed until you shut her down, and then she bogs upon restart, it could be fuel or ignition issues.Messages. 2. Mar 27, 2012. #1. Hello.. I have a 2006 Mercury 9.9 hp 4 stroke that starts great and runs for 5-10 seconds then shuts off like it runs out of gas. It starts right back up and runs for 3 sec then off. Then if I try to start again it doesn't. If I let it sit for a day it will start and run for 5-10 seconds then shuts off, etc, etc.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.If the alternator is malfunctioning, then replace it. NB: Electrical issues are very common. You may find the issues on the Blue Wave boat and or Mercury 115 2 …I have a 2005 90hp 2 stroke Johnson carbed outboard. I pre-mix the fuel and oil, and still have the original fuel / oil pump with the oil side disconnected and plugged properly. My problem is at low RPMs, about at "no wake" speed. After running the motor for just a couple of minutes at low RPM, when I give it more throttle, it bogs down and ...

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I have a 2005 90hp 2 stroke Johnson carbed outboard. I pre-mix the fuel and oil, and still have the original fuel / oil pump with the oil side disconnected and plugged properly. My problem is at low RPMs, about at "no wake" speed. After running the motor for just a couple of minutes at low RPM, when I give it more throttle, it bogs down and dies.2 stroke outboard starts but then dies when throttled or idle. paulg222: General Sailing Forum: 57: 04-08-2021 14:15: Perkins 4.154 starts immediately, runs great, then knocks off once put into gear. Af: starfish62: Engines and Propulsion Systems: 16: 08-09-2015 06:32: Engine runs today--dies tomorrow: sidsail: Engines and Propulsion Systems ...Jul 20, 2020 · 927K views 3 years ago. This is really an easy fix you can do yourself without having to pay a mechanic. 🔷️ HERE IS PART 2 of this Mercury outboard fix. Finding the high pressure fuel filter ...Initial setting is: Slow speed = seat gently, then open 1-1/2 turns. Start engine and set the rpms to where it just stays running. In segments of 1/8 turns, start to turn the S/S needle valve in. Wait a few seconds for the engine to respond. As you turn the valve in, the rpms will increase.Tohatsu outboard problems. I worked with tohatsu on the height of the mount. no difference. I measured it and it ended up only being about 1 and 1/4 inch lower than stock. Got back with tohatsu yesterday and they are stumped. They think the boat is two big for the engine and that is why the rpms are running 1200 rpm under nominal .We would like to show you a description here but the site won’t allow us.Re: 1995 90 HP Mercury Outboard - runs for a while then shuts down New developments in regard to this. After a discussion with a local Mercury Outboard mechanic, he confirmed the fuel pump operates on crankcase pressure and that pressure can be lost if the oil reservoir top isn't secure.An Outboard Motor smokes because it is burning oil. Two-Stroke Engines burn oil all of the time. Four Stroke Engines burn oil at startup mainly because of oil left in the cylinders or all the time with an oil leak. There are a couple of tricks that can be done to reduce the amount of smoke that an engine burns and here are your best options!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.Yamaha 4 stroke not running. I have a 2015 70hp 4 stoke Yamaha outboard that has not been run for 12 months. It has always started first go in the past, even after a long period of inactivity but this time it will not run. It occasionally tries to kick over and on a couple of occasions after fiddling with the fuel system it has run for up to ...Watch out for both as temperatures spike this summer. With a record-breaking heat wave roasting the Pacific Northwest, it’s important to not only stay relatively cool but to active...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. ….

Boat runs fine for 5 to 10 minutes. Then it stalls and won't restart. If I wait about 20 minutes it will start and run for less than a minute and stop. Has brand new battery. I put on a new coil. Has brand new spark plugs. After it dies it won't even crank (sounds like the battery is dead). It is a 1987 Baliner Capri.If the alternator is malfunctioning, then replace it. NB: Electrical issues are very common. You may find the issues on the Blue Wave boat and or Mercury 115 2 …You have two choices for a fix: Wait about 10 minutes and try starting again. Do not use the choke, open the throttle all the way and try starting again — it will usually take at least 2 to 3 pulls. If it doesn’t start with a half dozen pulls, wait 10 minutes and try again. Sometimes, after flooding, it will start and then die.Yamaha 4 Stroke Outboard Idle Problems: 5 Reasons with Solutions. Before understanding how the whole issue can be fixed, take a quick glance at all the causes and cure below. Reason. Solution. Clogged Carburetor. Clean the carburetor. Faulty Carburetor. Readjust the carburetor. Dirty Filters.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 ...Jun 26, 2018 · 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 ...Sep 11, 2012. #9. Re: 1986 40 hp Evinrude starts, runs, dies. the ball will go soft once it is running because the fuel pump takes over. If you have to keep hitting the choke you have to clean the carbs. From the tank to the fuel pump make sure that you use real clamps not the plastic ties, they seem to always leak. L.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 acting ... 2 stroke outboard runs then dies, Problem #2: Poor Performance. If your Mercury 20 HP 4-stroke engine is running poorly or not producing as much power as it used to, it could be due to a number of factors. For instance, a dirty air filter could be restricting airflow to the engine, which can lead to decreased performance. In this case, remove the air filter and clean or replace ..., The common causes of 2 stroke bogging at full throttle include using the wrong gas mix, dirty or clogged air filters, damaged spark plugs or barrel gaskets, and damaged intake manifold gaskets. Easy fixes include using the correct fuel, cleaning dirty parts, and replacing the damaged components. These are just a few reasons for two …, 8,646. Sep 5, 2006. #2. Re: 1993 25 hp mercury runs but then stalls and won't start. My guess is it's flooding. But instead of the shotgun approach, why not troubleshoot logically, one step at a time: First, compression test. Report the results. Next, determine for yourself whether a cylinder is dropping:, Summary. The most likely reason that your two-stroke engine is stalling under load is that your carburetor is dirty or dead. It is still worth it to run through the other, easier fixes of your engine, before jumping to the rebuild of the carburetor. Check your filters, gaskets, spark plugs, and vents first, as you may luck out with a simple fix ..., 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., Jul 21, 2018 · 9.9.yahama outboard engine surges while running.idle reves up really high on starting or shifting from gear to neutral then drops to low idle and stumbles o..., Messages. 4,087. Mar 27, 2012. #2. Re: Mercury (Classic) 40 hp loses power on full throttle. Typically when a motor starts, idles, and runs well at full throttle for a bit, and then performance dies down it is a failing ignition component. And LOL at "classic". There are some guys on here with motors from the 30's and 40's!!, Jul 20, 2020 · 927K views 3 years ago. This is really an easy fix you can do yourself without having to pay a mechanic. 🔷️ HERE IS PART 2 of this Mercury outboard fix. Finding the high pressure fuel filter ..., Hi everybody!!!. I have a tohatsu 2006 4 stroke 9.8 hp runs less than 1 minute then dies and will restart but dies again. I bought a primer bulb thinking that was the issue but still the same i think it might be a electrical issues any advice or ideas would be greatly appreciated., 05-14-2010, 10:05 AM. I have a 2000 yamaha 60 hp 2 stroke that is on and off again cutting out problem at various speeds.I've eliminated fuel and have replaced one coil and have moved that new coil to each cylinder with no difference. Sometimes it will run great then it cut out like it's running on just 2 cylinders,more so when I back off when ..., Suzuki DF250A runs good and then dies. 10-18-2021, 10:23 AM. Good Morning All, I have a 2002 2800 hydra sports boat with twin 2018 DF250 engines. The boat seems to run great until I stop somewhere for a while and start back up. It will usually run for 3-5 minutes and then die. I get 3 beeps when it shuts down., Chiropractor's stroke experience helps him treat fellow patients. Trusted Health Information from the National Institutes of Health Stroke survivor Gregory Symko, D.C., demonstrate..., 4. May 1, 2014. #2. Re: 15 HP 4 stroke runs only while choke is completely out. budonzi said: Usually my Merc starts right up with the choke out and continues to run at idle when the choke is pushed in. This year, at start up, it dies out when the choke is pushed back in. I put in Stabil last Fall and ran it dry before putting it up for the winter., Aug 18, 2012 · 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., Mercury & Mariner Outboards . 99 115 2-stroke vibrates/runs rough midrange **FIXED!** ... and then look for the fuel filter and clean or replace, then onto the fuel pump and see what kind of vacuum it has. I just bought this boat this spring and need help also. Stan . L. lugnutz426 Cadet. Joined Jul 24, 2009 Messages 9. Jul 26, 2009 #3 …, Aug 18, 2012 · 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., The reason. Among all the things that can cause a coolant leak in your Mercury 50-hp 4-stroke engine, the most common reason is a faulty gasket or O-ring. These can eventually wear out and leak, especially if not properly maintained. Another possibility is a crack in the engine block or cylinder head., 31,574. #10 05-07-2019, 09:31 PM. I was taught this procedure long ago to easily start a two stroke outboard first thing in the morning. 1) Pump the bulb until it's firm. 2) Trim motor down until level. 3) choke motor to a slow count to 10 to prime carburetor. 4) Advance cold start lever (if there is one)., When a two-stroke only runs on half choke it is usually the result of a dirty fuel cap, a leaking gasket, a clogged carburetor, or a gunky passageway. In rare cases, it could be the result of a crack somewhere on the engine. You can fix these problems by cleaning the carburetor, removing the fuel, and adding new gas., 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., Re: Root cause of Mercury 2-strokes' rough idle. Rough idle is a subjective statement. If all is normal, 2-stroke idle is acceptable. Sometimes near as good as a 4-stroke. Many things can affect idle quality. Probably too many to mention. The one that we fear the most is uneven compression. C., To check if your gas pump is working well, inspect the relay, fuse, fuse holder, and harness connector pins. For the fuel pressure, you should aim for something between 4 to 7 psi. Yes: All good, next test. No: Your fuel pump is most likely not pushing the correct amount of fuel inside the carburetor/engine. As a result, your engine cannot …, Dec 15, 2009. Messages. 24. Jul 19, 2011. #3. Re: Mercury 115 hp engine problems. All four cylinders had between 115 and 120 psi if I let the engine crank for aprox 2 secs. If I just hit the start and let off, they varied from 105-120 psi. I checked spark and had a good solid spark on all four cylinders., 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., Electric power only started making sense for land vehicles about ten years ago, but now the technology is ready to make the jump into the water. Pure Watercraft hopes that its elec..., 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 opposite., 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 Working, Hello, I've replaced the gaskets on the carb, cleaned it, rebuilt the primer/fuel pump, replaced the tank gas line, bulb and connectors. Starts easy, runs fine for about a minute, then dies. Apparently running out of fuel. Can't tell if there's any vacuum or not, so not sure what the problem is. If I pump the bulb before it dies, it'll run ..., A leaf blower starts and then dies from old fuel, a plugged air filter, a clogged fuel tank vent, a plugged fuel filter, clogged fuel lines, or a dirty carburetor. It can also stop running when the spark arrestor is clogged, the cooling system is plugged or the choke isn't set in the correct position. Always take safety precautions before ..., My 2.6 4 stoke outboard motor starts but then dies, the motor has ran 1 time in freshwater a year ago .now wont keep running. Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts., The good news is that the outboard actually runs, so the problem shouldn’t be hard to fix, it's just a matter of finding out what’s stopping the motor from idling as it should. Watch the video above or read on below to learn how to identify and fix problems with an outboard that won’t idle properly., Tweet. #1. Yamaha 15 hp two strokes dies at low rpm. 03-07-2015, 02:57 PM. I had my Yamaha 15MSHU two stroke overhauled last year. The first time I used it in December it started on the first pull and ran perfect. In February I went to use it and it would only start at a very high RPM setting., 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 Working