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The engines need 3 things to run properly. Compression, timed spark ignition, and the proper ratio of fuel to air. ... I HAVE A 2001 YAMAHA 75 HP 2 STROKE OUTBOARD MOTOR.IT STARTS AND IDLES WELL BUT IT WILL NOT REV UP UNDER LOAD MORE THAN 2500 RPM. AS I RUN AT 2500 IT WII PICK UP AFTER ABOUT 5 MIN. TO 3400RPM.480. Jul 28, 2011. #10. Re: Engine will not stay running without choking. You can usually buy single guitar strings at a music shop. They are various gauges. The smaller ones are usually $1.00 or less. Made of stainless steel and will last for life. Electric guitar .006 may be about the smallest.Its my understanding that outboards are only designed to run at full throttle about 10% of the time (I dont remember where I read this, but I did). Im not saying it will fail if you run it wot for that long, but I dont believe it was designed for it. Many people think wot is bad, many others think low rpm is bad.Nov 10, 2023 · What causes an outboard motor to lose power under load? An outboard motor may lose power under load due to tangled propellers and fuel leakage. Air leakage in fuel lines and spark plug corrosion can also cause power loss. Other than these reasons, bad gas quality, and a bad impeller are also possible reasons. These are the main culprits.Re: Full throttle and 2,500 RPM it will not go higher than that. All the signs say not firing on all cyl's, troubleshooting will zero in on where and why. A timing light will quickly show if the dead cyl is sparking or not. Its not good to rev up like that, if theres a fuel clog you're turning a cyl at 5K with no lubrication.105. Apr 13, 2009. #8. Re: my outboard pops out of gear or into neutral. The spun hub theory is a good starting point. If that is not the problem and the engine is actually jumping out of gear under load you will need to inspect the parts in the foot. The cheapest and most common problem is the clutch dog.need help have a 6.2 mercruiser herizion has no power under load will not go over 2500 rpms starts fine and idles fine ... Outboard Motor Parts Chrysler outboard parts Evinrude outboard parts Force outboard parts Honda outboard parts Johnson outboard parts Mariner outboard parts Mercury outboard parts Suzuki ... FULL SITE MENU. Shop for Engine ...They should be a medium brown color. If you haven't changed them in the last year, put in new plugs and try it you might get lucky. Weak plugs can do okay at idle but under load they won't provide enough spark to really fire the cylinders at high RPM. Spark: Use a spark gap tester. Should jump 7/16" gap.1. Too Much Load is Applied for the Generator Size. Generators don't have the same capacity. There are limits to the wattage a generator is able to handle. When you exceed this limit, the generator can bog down. This will not only cause your generator to run sluggishly but also can cause potential damage to the generator and the items ...Jan 21, 2010. #7. Re: Outboard bogging down under load. Expect around $100 to $120 apiece for carbs. Seafoam is great stuff, I use it, keeps the carbs clean, but it's not a solvent. Besides which, the gaskets, orings and especially …An unresponsive engine is one of the most frequent issues with outboard motors. A dead battery could be the problem if the engine won’t start or makes a clicking noise. To see if it helps, check the battery connections and try jumping it. A blocked gasoline filter, which needs to be replaced on a regular basis, could be another problem.10-08-2015, 08:34 AM. My 2004 Yamaha 40hp outboard loses power when under load. After about 15 minutes of operation the engine will lose power and revs only when a high load is put on the engine. For example, when towing a tube and coming out of a circle, or when motoring through small waves or swell. To stop this problem i simply come back to ...Leaking Gear Oil. If you notice gear oil leaking from your outboard motor, it's a sign that the lower unit oil contained might be damaged. Gear lube leaks can be caused by a number of things, including damaged seals or gaskets, a cracked case, or stripped pinion gear and some reverse gears. Grinding Noises.Restricted exhaust system (broken exhaust shutters/flappers) in engine transom shield or drive. 9. Poor cylinder compression Compression Test. 10. Carburetor defective, or wrong type. 11. Fuel pump pressure and vacuum. 12. Boat overloaded, improperly loaded, or improperly trimmed.Unscrew the power pack cover and locate the coil wire going to the coil and then to the spark plug. Remove it and place the coil wire on another screw terminal of a working coil. This will rule out if the coil is bad or not. If you get spark then it is the power pack. Such it was in my case.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 …The Yamaha T9.9 is one of today's smallest and lightest high-thrust 9.9 hp outboard motors and serves a perfect kicker outboard for a variety of boats. Weighing 102 pounds (20-inch model), the T9.9′s 212cc, two-cylinder, overhead-cam engine provides smooth, reliable power and torque with outstanding fuel efficiency.Engine Malfunction. This should be the first thing to check if you're having RPM troubles. There are a few signs that your engine isn't working as it should: Overheating. Engine timing out. Ignition not starting properly or bogging. Burnt out spark plugs and coils. Defective power pack or connections.1. Contaminated or old fuel. 2. Fuel starvation due to a clogged fuel filter or fuel line. 3. Water in the fuel. 4. Improper fuel-to-oil ratio for two-stroke engines. 5. Air …Problem: My 2006 5 HP Mercury Outboard started easily and idled perfectly first trip this year. Wouldn't rev to full power. Assumed Ethanol affected carb or small amout of gas left from previous year. Cleaned carb and replaced, same problem. Installed new carb, same problem. Replaced exterior tank, tank line w/bulb, filter and all interior gas ...

An outboard motor is commonly used on small boats as a means of propelling and steering the craft through a river, lake or other body of water. Here’s a look at the fundamentals of...So the issue at the moment is that it won't rev up over 2000 rpm while under load. In neutral, it will spool up no problem. In gear it will run at around 2000 rpm, and occasionally rev up to 3-4000 rpm for a sec, and die back down to 2k. Now the thing is if i keep pushing the choke it will rev up to about 5000 and seem to run somewhat normally.4. Mar 15, 2010. #1. my 2000 model 50 hp mercury is bogging down when at full throttle. it cranks and idles fine. put in gear, it runs fine at idle speed. once i go to take off, it starts bogging down and won't get above 2800 rpm. it did this last week, so i drained the carbs and it ran fine. its now doing it again. i've drained the carbs 3 ...2.1. Lack Of Power And Poor Acceleration. If your Suzuki outboard motor is experiencing a lack of power or poor acceleration, consider the following steps: Check the propeller for damage, bends, or dings. Replace it if necessary. Inspect the fuel system, including the fuel filter, fuel pump, and carburetor, for any clogs or issues.

Outboard Motors Forum. Mercury Mariner Outboard Forum. Identifying Model / Year / Horsepower ... . Mercury 60hp efi no power under load. Thread starter MikeP42; Start date Oct 18, 2021; M. MikeP42 New member. Oct 18, 2021 #1 ... 4 coil. oil is changed every 3hrs.It will not rev under load but will hit rev limit if you trim out to take the load ...It’s time to run (or walk, or otherwise locomote under your own power) one whole mile. Then take a break. And if you still have it in you, do it again. That’s right, we’re doing mi...Jun 23, 2011 · 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 ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. 28,765. May 13, 2006. #8. Re: mercury 60hp. Possible cause: 9.9 Honda does not run at full power on full throttle. It runs at about .