2 stroke outboard runs then dies

Dirty Air Filter. Less clean air means the jetting will become more rich, which can cause your dirt bike to bog. Keep the air filter clean, whether you have a 2 stroke or a 4 stroke. Cleaning/replacing the air filter is regular maintenance that you need to be doing to any dirt bike you own.

My daughter bought a used boat with a Yamaha 200HP HPDI in February and has constantly had problems with the engine losing power. Her local marina mechanic has changed the thermostats, replaced the gaskets to the low pressure pumps and adjusted the cables. Each time he fixes something, the boat initially runs well but then develops …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.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 ...Johnson & Evinrude Outboards . 2000 Evinrude 15HP 4 stroke runs great for 10 minutes, then dies. ... 2000 Evinrude 15HP 4 stroke runs great for 10 minutes, then dies. Got a new ignition module for $300. Installed in about 5 minutes and went for a test run. No luck and no change. I have now wasted $300. Seriously thinking of just …Yep, the high speed jet gets the high RPM's, the low speed jets, low speeds.. Make sure ALL the openings are clear (you can see thru them. If the fuel is older than a month and un-stabilized, it's likely bad. Dump it and get fresh fuel B4 trying to crank it up again. Un-less you enjoy "do-overs".

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 ...8,646. Jan 20, 2010. #5. Re: Outboard bogging down under load. Classic symptom of clogged carb (s). It's customary to do a compression test and spark test first. Since you'll do both carbs (assuming compression and spark check out), the cylinder drop test is moot, but the fuel tank inspection is always a good idea. F.874. Apr 29, 2011. #4. Re: Troublshooting: Outboard won't run without starting fluid. Pulling the starter to get to the carb is not that bad, don't be intimidated. Make sure the battery is disconnected. Be careful with the mounting studs. Sometimes the nut comes off, sometimes the stud comes out of the block.Yamaha 90 2-Stroke Runs Rough @1800 rpm. 09-02-2013, 06:34 AM. My 1998 Yamaha 2-Stroke starts easily and will idle and ***** all day long. Under power, it is smooth and strong up to it's maximum 5200 rpm on my 17' Boston Whaler Montauk. The problem I'm experiencing comes in "slow speed zones", where the motor is running at 1600-1900 rpm.Start the motor and work the throttle at the motor to keep it running. Once it is stable and you can turn loose of the throttle arm: With the motor running -. If the top plug shows wet start with the top carb. Tighten the idle adjust screw 1/4 turn and stop, listen. Give it a couple seconds for lag.Really amazing. After that and a spray down with carb cleaner and compressed air, new carb kit and an inline fuel filter installed, my 97 started like a champ. Test run afterwards showed the symptoms persist. See title: runs fine for about 10 minutes then starts cutting out, backfires, and dies. Let it sit a few minutes and it starts again ...

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 ...Here are his thoughts on Hesitation and Bogging Down On Applying Throttle. This is a common problem and is usually caused by a sticking timer base under the flywheel or fouled, clogged carburetors, however… also check the carburetor linkages, compression, spark, and the timer base as follows. Carburetor Linkages: Check the carburetor throttle ...I'm still receiving my education in outboard motor troubleshooting, maintenance, and repair. issue: outboard motor (75hp mercury tracker -- 3 cylinder, 2 cycle) cranks, run well for several minutes at full throttle, then dies (or sometimes idles if I pull back the throttle when I hear the engine losing power).I prime the bulb, the motor cranks on 1st turn, runs well for several mins at full ...Because the concentration of oil in a 2-stroke is so low - 1:40 or even 1:50, depending on the engine, it's easy to think that it isn't necessary. Not so; it's vital. Running a 2-stroke without lubrication is not good. If your engine will still turn over, it isn't seized, and you may have dodged a bullet. Put the correct oil/fuel mix in and see ...Hey all, So after fixing up this outboard by myself and youtube help, i finally got it running after 2 years. Have been on the water for around 7 weekends now and finally after trusting the motor decided it was time to go out further to the islands and just getting off the boat ramp (extremely slow moving) it died, sat there on anchor for around an 1 hr got it to start on many occasions and ...

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Mar 5, 2012 · 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 ...Re: 1986 Evinrude 2 Stroke V6 150 hp starts (with manual help) then dies. Please help I pulled the carbs and cleaned everything with carb cleaner even sprayed inside the lines, pins, jets, everything. It started and ran for about 45 seconds and sounded good but died after. I checked the position of the floats and how far they opened looked good.If your Mercury outboard run then dies and you need to change your fuel filters on the 2005 Mercury the fuel filter is difficult to find. In this video I wil...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 ...When it dies out, if I manually squeeze the primer bulb it will often fire back up. ... Does the level of the 2 stroke oil affect the operation, in example I know the generator on my motor home will shut down when the oil is too low. ... 1995 90 HP Mercury Outboard - runs for a while then shuts down New developments in regard to this. After …Conclusion. Your outboard motor may die when shifting gears if not all cylinders are firing correctly. This is because the engine won't be generating enough RPMs to keep the motor running, so it will sputter and die. The root problem may be related to a bad spark plug, ignition coil problem, or even a fuel problem.

Overview of what happens during a stroke and how it can be prevented. Trusted Health Information from the National Institutes of Health Understanding the symptoms and risk factors ...New Suzuki 150 losing power and running rough under load. 09-14-2019, 10:15 PM. Hey everyone, I'm new to Suzuki's and this forum. I have a new Suzuki 150 with 21 hrs on it. It has run fine since new. I did the 20 hr service on it last weekend and was able to get it on the water today. Idled out from the ramp and brought it up on plane and ...Jul 31, 2009. #10. Re: 15hp wont run unless I keep fooling with choke. tx1961whaler said: Don't get your fuel/air "lean" mixed up with the gas il ratio "lean". Two different things. The carb regulates the fuel/air mix going into the motor. If that is "lean" then too much air is going into the motor.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.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.Jan 22, 2024 · 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 stay ...Try the cylinder drop test. Get a plastic pliers and pull the plug wires one at a time off while it is running. If all the cylinders are firing the idle should change as you pull the plugs off. If the idle doesn't change when you pull a plug wire off or you don't hear a snap from the spark. That cylinder is probably not firing.Jul 18, 2021 · 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: '01 Yamaha 115 2 stroke starting problem. rodbolt said: once you make sure the choke linkage and the throttle linkage is properly adjusted, simply TRY the correct starting procedure for a 2 stroke 115 yamaha. with engine down pump fuel primer to insure fuel is avalible in the fuel bowls, thats ALL the primer does.Turn it in clockwise to lightly seated and then out 1 1/2 counterclockwise. Choke it and start it and let off the choke then feather the choke usually a few times until it idles on its own at high idle. You are mixing 50:1 oil mix correct. When posting give as much info as possible, model number, when it started acting up and what have you done.

2003 225hp Yamaha 4 stroke - Dies while running - Appears fuel related. Need some Help . Jump to Latest Follow ... Both times the boat had been stopped for about 1/2 hour anchored or drift fishing and then started fine, started to come on plane and lost power and died. Pumped bulb, started and ran fine.

Make sure that your carbs are clean. I have had to rebuild carbs a couple of times and mess with float levels at times before they run perfect. Tuning is only effective if all the jets and seals are working properly. persistance is sometimes the most frustrating part of tuning 2 stroke engines.This abnormal movement may indicate a bent, broken or altered propeller. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. Suzuki outboards are produced by Suzuki Marine. They can range from 2.5 horsepower to 300 horsepower. Outboard motors are attached externally to the stern.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. If you are unsure what type of engine you are running …Jun 17, 2007. #3. Re: 90 HP Merc - runs then dies after throttle. Welcome to iboats!! I'd start by checking spark, compression and fuel. Spark should jump a 7/16th gap and be a hot blue. Compression should be over 100 on all cylinders and within 10% of each other.Jul 29, 2009 · 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 a while afterwards, After giving it 30-45 minutes it...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.issue: outboard motor (75hp mercury tracker -- 3 cylinder, 2 cycle) cranks, run well for several minutes at full throttle, then dies (or sometimes idles if I pull back the throttle when I hear the engine losing power). I prime the bulb, the motor cranks on 1st turn, runs well for several mins at full throttle, then dies/loses power. [repeat!]

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Step Six: Reconnect the Fuel Line. The last thing you do before getting out on the water is reconnect all the fuel lines to the boat carburetor. Once all the fuel lines are connected, start the engine and let it run for several minutes. If the bog is fixed, the engine should run smoothly, and you can get back on the water!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...Re: Mariner 6hp 2 stroke problem. It seems to be pretty solid yeah, and ive tried to continually pump it while im trying to hit the higher revs but it still dies out. I had it running wide open throttle for about 10 seconds but it then died and the engine would cut out unless i reduced the amount of throttle i was giving it.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.The motor starts in about 1/2 a turn, it runs perfectly at idle. It will shift into gear but bogs down when it is under a load. It will not get past 2000 rpm's. Here are the things ive done so far. 1. cleaned carbs with cleaner and air pressure. 2x's. made sure needle was falling when float comes down 2. Drained all old gas out, put in new gas ...Jun 13, 2010. #4. Re: Mercury 60hp Efi Bigfoot Stalling. Hi, I have a 92 Mercury outboard 60 HP that does the same thing. It starts ok, then after it passes 2400 Rpms usulaay in 10-20 seconds in shuts off. today I had to go back to the pier really slow so it wouldnt do it anymore. The carbs have been cleaned 2 months ago and the plugs are new.Spray a little bit of starter fluid or carburetor cleaner directly into the air intake on the carburetor. 3. Pull on the starter rope. Now pull the starter rope and see if your engine starts up. Diagnosis: If the engine fires up and immediately dies, then you probably have a problem with your carburetor.Because the concentration of oil in a 2-stroke is so low - 1:40 or even 1:50, depending on the engine, it's easy to think that it isn't necessary. Not so; it's vital. Running a 2-stroke without lubrication is not good. If your engine will still turn over, it isn't seized, and you may have dodged a bullet.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 ...Before coronavirus, video conferences were a largely stale format. The global crisis has forced organizers to get creative—with intriguing results. Spring is a particularly busy ti... ….

My engine is a 2008 Mariner 40 HP 2-stroke 2 cylinder ( Belgium version) S/N 0P550276. I bought it six months ago and tested it in a barrel and it ran like a dream on the 3rd pull. When I opened the throttle, it would always take a second or two for the engine to catch up and increase rpm. I payed no attention to this.I'm just not a 2 stroke guy. An often overlooked item is/are the grounds throughout the engine systems. If there is a bad ground, plenty of resistance can interfere with electronics like coils, and electricals like fuel pumps. Might also be time to start with the fuel vent. Make sure it's clear. Clean or replace the fuel pickup tube. Check fuel ...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 ...4. May 15, 2014. #1. My 50 HP Mercury will only run at half throttle. I have replaced the powerpack, coils and trigger but am still only getting half throttle. I tested the voltage on my powerpack and am getting 295 volts from the stator side and around 150 from the coil side. The compression on all four cylinders is around 130 psi.Some of the reasons why Johnson outboard motors lose power at full throttle includes overloading, overheating, use of bad fuel to oil mix ratio in the 2 stroke variant, use of bad spark plug and faulty ignition system. When these problems occur, the power generated from the outboard motor will be reduced.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.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 ...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.I'm still receiving my education in outboard motor troubleshooting, maintenance, and repair. issue: outboard motor (75hp mercury tracker -- 3 cylinder, 2 cycle) cranks, run well for several minutes at full throttle, then dies (or sometimes idles if I pull back the throttle when I hear the engine losing power).I prime the bulb, the motor cranks on 1st turn, runs well for several mins at full ... 2 stroke outboard runs then dies, 5,808. Feb 9, 2011. #2. Re: Disconnecting fuel line. Welcome to iboats, I hate to tell you but your dad was wrong, it is bad to do that because 1 cylinder always runs out of gas before the other which means the engine is running without oil in one of the cylinders. There really is no reason to do that at all unless you are going to store the ..., 1995 Evinrude 130hp My outboard did not start and did not have any spark/sometimes intermittent spark. So on a hunch i decided to replace power pack (used) and sure enough that fixed the problem. Now it starts, however, it only stays for about 1 minute then shuts off. It sounds like a fuel..., So I had my motor serviced a few weeks ago its a 1990 Johnson vro 200hp oil injected 2 stroke. motor has new spark plugs,impeller, water pump. the gear oil was changed, spark,compression, and carbs all checked out good. . I took the boat out 2..., Jun 25, 2005. #4. Re: Outboard stalls in gear under load. If pushing the choke helps the problem then at least you do have a carb issue. <br /><br />You can't really tell if the engine is running on all cylinders in the driveway. I have fallen for this myself. I swore up and down that it was running on all, but in the end, it was running on two. L., , Yep, the high speed jet gets the high RPM's, the low speed jets, low speeds.. Make sure ALL the openings are clear (you can see thru them. If the fuel is older than a month and un-stabilized, it's likely bad. Dump it and get fresh fuel B4 trying to crank it up again. Un-less you enjoy "do-overs"., 8,646. Jan 20, 2010. #5. Re: Outboard bogging down under load. Classic symptom of clogged carb (s). It's customary to do a compression test and spark test first. Since you'll do both carbs (assuming compression and spark check out), the cylinder drop test is moot, but the fuel tank inspection is always a good idea. F., 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 ..., * VISUALLY EXPLAINEDWhen a chainsaw will only run on the choke position, it typically indicates an issue with the carburetor or fuel delivery system. The cho..., This is usually due to the use of a wrong mix ratio especially in a 2-stroke outboard motor. To avoid this, you have to make sure that you use a good mix ratio in running your outboard motor. This is why using one of the best fuel to oil mix ratio in running your outboard motor which is 50:1 will always give a good performance. 3) Faulty Fuel Pump, Under normal running conditions, the bulb will not stay rock hard. It should stay "inflated" though. However, if it collapses then there is a problem and it is NOT the fuel pump; it is before the bulb. Think about it: If the bulb is collapsing then the fuel pump is trying to draw fuel but it is not getting as far as the primer bulb., Re: outboard stalls when advancing throttle past idle speed. Hi Jefferson,<br />Most outboard carbs have intermediat fuel openings that are located just in front of the throttle plates. The purpose of these is to act similar to the accelerator pump found on 4 stroke carbs. They are supposed to help eliminate the dead spot from idle to advance ..., Joined. Aug 4, 2007. Messages. 20. Aug 25, 2007. #1. I just bought a 1998 Mercury 40 hp outboard (serial # 0G660803, model 40M?). Engine looks remarkably clean, but bogs down to the point of dying when I go from idle to full throttle. When the problem is happening, the motor will run smoothly at idle and at low throttle while in forward gear., 874. Apr 29, 2011. #4. Re: Troublshooting: Outboard won't run without starting fluid. Pulling the starter to get to the carb is not that bad, don't be intimidated. Make sure the battery is disconnected. Be careful with the mounting studs. Sometimes the nut comes off, sometimes the stud comes out of the block., 2 stroke 25/40 loosing power after 10-15 min (when warm) 07-03-2021, 02:29 PM. Like mentioned, I have 1996 (?) 25QEO, deristricted to full 40 hp, its loosing power when gets warm. On wot and cruising speed, it slowly slows down, till i'm not planning anymore. If i shut it off, pump it ( prime it) the pump feels full, it starts from first two ..., Oct 4, 2020 · If your Mercury outboard run then dies and you need to change your fuel filters on the 2005 Mercury the fuel filter is difficult to find. In this video I wil..., Most two-stroke engines have two screws that allow you to adjust the carburetor. One of these screws adjusts the mixture of the gas/oil/fuel mixture, and the other screw controls the speed of the idle. To adjust the carburetor, you need to have the engine running. Slowly turn the screws to adjust the carburetor until the engine is running smoothly., 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 ..., ADMIN MOD. Outboard only starts with starting fluid then dies. I have a 2007 Tohatsu 6HP 4 stroke that I recently bought used. I'm fairly sure this is a carburetor issue, because we've tested the fuel lines and fuel pump, and the outboard doesn't start unless starting fluid is used, and even then it only runs a couple seconds, which I ..., Make sure that your carbs are clean. I have had to rebuild carbs a couple of times and mess with float levels at times before they run perfect. Tuning is only effective if all the jets and seals are working properly. persistance is sometimes the most frustrating part of tuning 2 stroke engines., Have some issues with my 90hp Yamaha outboard motor. It recently died on me out on the water. Got towed in and the engine starts fine then stalls out after 10 seconds. When I go to start it again it dies out sooner than the first time. Thinking it's a fuel issue but not sure where to start. Changed the inline fuel filter as well as the fuel ..., 8,646. Jan 15, 2008. #2. Re: Hard to start after warm-up. Relax, that's not unusual, and it's not a sign of impending doom. Fuel pressure should hold all day, but I'm guessing that's a symptom, not the cause of your hard start, since pumping it up doesn't immediately cure it. My theory is a leaky carb float valve (is that a carb or injection ..., Check to make sure that the shifter is not in forward or reverse. 4. Fuel Problems. If the engine turns over or cranks like it always has, then chances are you are looking at a fuel problem. Always start troubleshooting with the simplest items first. Check the fuel system step by step, from the tank to the motor., 2007 Mercury 90 2 stroke carb'd. Rebuilt the carbs, new plugs, new filter all around 100 hours or so ago. Maybe a little less. Been running great. I changed the fuel line a couple weeks ago and I've had it out on the water probably 3x since then and it's been good. No different., 1. Failure of the Oil to Lubricate the Cylinders. It is critical to mix oil with fuel in a 2-stroke engine. Some 2-stroke Yamaha 40 outboards, particularly older models from the 1980s and 1990s, had a mechanism that injected oil into the fuel rather than requiring it to be pre-mixed. These would occasionally fail., Sep 13, 2020 · Tweet. #1. 2003 F115 hp 4 stroke problems after 15 minutes of running. 09-13-2020, 01:10 PM. My motor run great from idle to wot for about 10-15 minutes, then starts cutting out. Tach goes crazy up and down and engine really hesitates, and dies. Sometimes it starts back up, but I usually have to wait for 15 minutes for it to cool down, then it ..., 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., If it's a pre mix 2 stroke will have issues, will depend on you boating outings. If very frequent all year round, no issues. ... I've always run my outboards dry (at idle) and have never had an issue, but I've only owned single carb premix 2 strokes. Small outboards in the 5-15HP range. ... and then it was only on that one occasion, it doesn't ..., When it's completely charged, reinstall the battery and cables (positive cable first, then negative). Now that you have a ... I have a 2014 Yamaha 250 4 stroke with 700 hrs. Runs great, except yesterday it shut off at 3600 RPM's while cruising. ... I have a 2017 Yamaha 150 4 stroke outboard. It was running about 2,000 rpm across the lake ..., 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., Mar 21, 2018. #1. Ok... I just purchased an older boat with a 1982 Mercury 50HP 4 cyl 2 stroke. When I first got it I had no spark so I replaced the stator. Now I have spark, it cranks for for about 3 seconds then dies. I have to choke and throttle it all the way up for it to actually crank. It cranks revs (smokes a lot) and then dies., 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., 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 ...