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 ...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. Just before it dies, try priming the bulb and see if that helps. U.Outboard engine RPM’s are lower when they are in gear. They can die when put in gear because one or more cylinders may have a problem and are not firing. Once in gear the RPM’s are so low that the engine dies. Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem.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".4. May 19, 2003. #1. My Mercury 2 stroke 50 hp (1988) has a continual problem starting. When in the water, it can sometimes take 5 or 10 minutes to fire, when it does eventually turn over it is totally choked up, and takes some time to clear itself. Once going it is generally fine.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 19, 2017. #1. I got one of those dreaded 2000 Mercury 90hp four stroke outboards on my nitro. Starts and runs great at first. Will perform normally until gets warms (around 15 mins of run time). Spits and sputters, won't idle, dies, can restart with full throttle as it floods out once warm. I let it cool for 20 mins and it starts and runs ...7. May 26, 2017. #1. As in the subject line, those are my symptoms - with the addition that manipulating the throttle has no affect. It runs for a set length of time and then shuts off. All of the reading that I've done seems to indicate that it's an oil pressure safety switch that has failed (though I'm wide open for other suggestions)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 ...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. . In any of those cases, reliability is far better than it was in decades past, fuel efficiency has increased, and problems like smoky exhaust and ear-splitting sound levels are ancient histoHello, 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 ...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 ...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 ...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!Marine Mechanic: K. Kergan. It could have poor compression or weak or no spark on one or more cylinders. To narrow it down you should do a compression test and check the spark with a fairly wide gap like 1/2" or so. It should jump about a 1/2" gap with a strong blue spark on all four cylinders. The compression should be close to the same on all ...My problem consists of my outboard cutting off while im running.. The speed varies when the motor cuts off.. I can be going 15 or 50 but the motor will cut off a some point and its always randomly.. I can run sometimes for a while before it does it but sometimes it happens right when i head out.. But the motor will crank right back up..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 ...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-stroke ...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.May 9, 2004. #2. Re: Yamaha 200 HPDI starts and dies!! Has this boat sat up any length of time? Did you add fuel stablizer to the fuel and run it thru the system. It sounds like a fuel pressure problem. The high pressure fuel pump in the vst/fuel chamber. You need to put a fuel pressure gauge on this engine.4. Jul 3, 2004. #1. This is a 1995 9.9 Evinrude. We replaced the Tank, fuel line, and the pump that pumps the gas from the tank to the motor. When I start it and start going, the fuel pressure is lost and the motor wants to die. If I don't pump up that pump going to the motor it dies. It got the point the other day when that method didn't help.I have a 90 hp 2 stroke mercury outboard engine. It bogs down about 2-5 minutes of running. I can pull it back to idle and it idles fine no issues go to full throttle and will run great again for 2 minutes or so and bogs down again and so on so on. I have rebuilt carbs, rebuilt fuel pump, changed fuel lines to the good black fuel lines, changed ...I got a new 2019 DF 2.5 and I'm having two issues. Just wanted to see if they are actual issues before taking it to a dealer. Only 8 hours in on the break-in period. 1st issue: High warm idle. When I start the motor cold, it runs at a nice, low idle. I can put it in gear and it works like normal. After running around for 5-10 minutes (getting ...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 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.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.To repair this, replace your fuel filter. 4. Too Much Oil Can Cause the Engine to Shut Down. When there is too much engine oil in your snowblower then your engine may smoke, run terribly, and eventually may shut down. Too much engine oil can get up to your spark plug, into your cylinder, and hydro lock your engine.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 …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.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.Outboard engine RPM’s are lower when they are in gear. They can die when put in gear because one or more cylinders may have a problem and are not firing. Once in gear the RPM’s are so low that the engine dies. Here are the best and quickest technical troubleshooting tips and fixes that you can try in order to resolve this problem.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 ...Aug 17, 2013 · However a new problem (seemingly) occurs. Poor idle, runs under load for a while then dies out. I've replaced the fuel filter, checked all hoses and everything looks in order. When it dies out, if I manually squeeze the primer bulb it will often fire back up. Maybe the fuel pump is failing or there is restricted flow leading to it.Marine Mechanic: K. Kergan. It could have poor compression or weak or no spark on one or more cylinders. To narrow it down you should do a compression test and check the spark with a fairly wide gap like 1/2" or so. It should jump about a 1/2" gap with a strong blue spark on all four cylinders. The compression should be close to the same on all ...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.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:Aug 7, 2011. #3. Re: Honda BF20 4stroke stalls when idle or low rpm. Similar problem with my Honda 8HP BF8A was caused by clogged low speed (idle or pilot) jet. I don't know if the 20 has the same general carb design, but if it does, that jet can be removed from the carb body without removing the carb from the engine.May 14, 2012 · 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 ...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. In any of those cases, reliability is far better than it was in decades past, fuel efficiency has increased, and problems like smoky exhaust and ear-splitting sound …Re: Why does my outboard start and runs for 1 minute then dies/shuts off? i replaced all the floats, needles, valve and seals and found two floats were kind of stuck. i did not clean throttle bodies. It stays running if i push key in and hold it (or if i give it gas). I will check the jets.Dec 18, 2013 · 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...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, 2009If your outboard motor keeps dying, it could be due to running out of gas, running out of coolant, or an overheating engine. Other common causes include dirty or clogged fuel filters, faulty fuel lines or carburetors, and loose spark plugs.Dec 20, 2009. #3. Re: Yamaha 25 HP 2-stroke hard starting. The starting procedure in the owners manual is: * put throttle to start. * pull out choke fully. * Pull starter cord repeatedly till it starts. * If no start in 4 or 5 tries, increase throttle. * turn off choke when it starts.Possible Cause: Dead kill-switch or safety lanyard. Solution: Check the kill-switch and the safety lanyard to ensure they’re functioning correctly. Replace them if …Hi all: I have a 2002 Magnum 500 RMK. I just had the car rebuilt by a Polaris dealer. It runs great. Idles perfect accelerates excellent, perfect. That is, until it dies. It acts as if it runs out of gas, OR the spark fails. I added a new fuel filter, fuel pump, and fresh gas. I saw on the Polaris site that the spark plug cap could be bought ...I have a brand new Yamaha 4hp 4 stroke outboard, but cannot run it at full throttle. 1. From cold, the motor starts easily and I have to push in the choke right away. 2. At low throttle, I have run the motor for 40 minutes with no problems. 3. Within 30-60 seconds of accelerating to medium/full throttle, the motor dies over a few seconds.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'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 …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.Have an older (90's) Yam 8hp outboard 2cylinder, 2 stroke outboard. She will start very easily - pull choke out, prime bulb, throttle open to the "start" setting (about 50% throttle), couple of pulls and she starts. However no matter what I do she will not run below around this 50% throttle setting.The boat runs like a scalded dog but wont idle for nothin. I cleaned the carbs for the third time and it remedies the idle, then after about 30 mins of run time, idle jets get clogged again. It looks like a gel and also a white chalky substance inside of the carb. I dont know where the crap keeps coming from.2. Oct 14, 2007. #1. I'm having a minor problem with my 2004 Yamaha F150 (4 stroke with EFI). It seems to idle fine and shifts into gear fine. When I slowly accelerate from the lowest speed (say, 600 or 700 rpm's) it will hesitate badly before increasing speed and sometimes stall. If I push the throttle up more quickly, the initial hesitation ...Because outboard engines tend to sit over the winter time, holes in the intake manifold gasket can occur. These increase the air intake, causing a lean fuel mixture and vacuum pressure problems. The result is poor acceleration, rough idle and stalling. A manifold leak is easily detected by a hissing sound coming from the source of the leak.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 ...If your fuel pump is whining or squealing, it is typically one of two reasons. First, the pump might be starving for fuel. Fuel lubricates fuel pumps; if your fuel filter is blocked or clogged, it may be prohibiting gas from getting to the fuel pump. In this case, the problem is likely a blocked fuel filter, not necessarily a bad pump.A rough idle on an outboard is generally caused by a failed spark plug, a clogged or stuck open fuel injector, a clogged or dirty carburetor, or an engine that has an issue with the timing when dealing with a 2-stroke outboard. Knowing why an outboard idles rough is only the beginning, here is what you need to do to figure out why and how to ...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.To do this, locate both idle screws on the carburetor. One will be marked L (low) and the other will be marked H (high). Turn both screws in to shut the fuel off, then turn them back in the opposite direction 2 turns and start the engine. The engine may not run perfectly under these settings, but it should at least start up.15 minutes ago, pgiganti said: I have an old Yamaha CT1 175 two-stroke that's been sitting for a few years. I put in a new piston and rings and rebuilt the carb. Now it starts right up on the first or second kick, idles for about 60 seconds and sounds OK, then suddenly speeds up and dies. It doesn't make any unusual sounds when it's running.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 ...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.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.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”.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...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 ...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.It can be frustrating, especially when you're trying to enjoy a day of boating. An outboard motor dies when put in gear mainly because the cylinders are not firing. When you shift into gear, the engine RPMs drop; if the cylinders are faulty, the engine may not generate enough power to run. This can be due to clogged fuel filters, bad fuel pumps ...Re: Brand New Tohatsu 9.8 4 Stroke Dies After 2 minutes at Idle and Leaks from Lower There is a definite possibility you are going about it wrong. You want 10w-30 NMMA FC-W oil. Only fill 1/2 to 3/4 on the dipstick (about 3/4 quart). Check the dipstick. That sludge is coming from a drain, and may well be the result of an over-filled crankcase.In this article, I will discuss the common problems and the solutions for Honda’s 4-stroke outboards. A Quick Overview to Boat Gas Tank Vent Issues and The Reasons Behind Them: Problems. Reasons. Engine Dies Out. Jammed Carbeurator.Clogged Fuel Filter.Gunk in Idle Jets.Petrol Tank Vent Blockage. …2 stroke 25/40 loosing power after 10-15 min (when warm) 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 turns, then for a minute ...Yamaha 40 HP 2 stroke - starts, idles 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 …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...Mar 2, 2008. Messages. 15,640. Jul 23, 2013. #20. Re: Motor won't start when in water but starts fine with muffs. Remove all the spark plugs and retest with a hot battery, if still 45 psi quit throwing $$ at it. Motor should have a minimum of 100psi to run correctly. 1.2-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.In under two minutes, you could learn how to solve the problem for good! This helpful YouTube video by Succstrat explains what might be affecting your ability to get going. The way you have your primer bulb mounted could be your issue—and even if it isn’t–this guy’s accent and deadpan delivery are worth watching! Boat Fuel Problem.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.Outboard winterizing essential partsvu Outboard cooling system clean engines Mercury outboard runs then dies / part 2 / finding the other fuel Mercury hp 90 outboard stroke four fuel water system test low stutter started has further advise bill thanks justanswer. Wiring and Engine Fix DB.Re: Johnson 2004 115HP 4-stroke dies after starting. You can call me daytime 239 842 0294, if your dealer cant solve the problem. Dealer should check for trouble codes, check idle rpm, fuel pressure at idle and full throttle. remove the hose fom the idle control valve, look inside valve for dirt, bugs, rust.Tweet. #1. Yamaha 90 2 stroke idle. I'm at wits ends. 05-30-2022, 12:52 PM. Boat sat for a few months but was religiously started every week and idled for 5 minutes. Took out for a test quick run, when I returned to dock I noticed engine won't idle. It drops rpm's and dies. Been working on for few weeks now, mostly replacing parts.Feb 2, 2009 · 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 ...May 10, 2020 · Tohatsu 5hp 2 stroke runs fine for 20mins then quits and won't restart! sharpey: Engines and Propulsion Systems: 27: 14-06-2018 13:41: Tohatsu 5 2-stroke VS Tohatsu 6 4-stroke: Distant Shores: Auxiliary Equipment & Dinghy: 33: 13-04-2015 19:16: Yanmar 3gm30 dies after running: 2liveonboard: Engines and Propulsion Systems: 7: 02-07-2013 06:49874. 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.. 90 hp 2 stroke long time owner. It's likely Re: 4HP 1980 Mercury dies out after a few minutes and then onl 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 motor start and runs fine without issue. Idles @ around 5000-6000 rpm. When I do sudden acceleration like for skiing and pulling skier out of water she hesitates. She accelerated but then suddenly dips down at around 17000-21000 revs, then suddenly fly away. Sometimes she will stall but not always. Re: 40 HP Mercury stalls when given throttle # 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. Watch out for both as temperatures spike this summer. With a re...
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