outboard motor not running at full power
Posted by in Jan, 2021
We’re going to hope, at this point, that your engine is humming along, providing great performance for your boat. If you’ve got a portable tank and your engine is misbehaving, the first thing you want to do is check to make sure the valve on your portable tank is fully open. 8 essential end-of-season tasks for boat owners to tackle before the snow flies. An inefficient boat engine may well be a source of pollution. A little TLC and preventive boat motor maintenance will help with safe boating and keep your motor running well for years to come. This abnormal movement may indicate a bent, broken or altered propeller. Another possible cause is an air leak in the fuel line. The only way to test the full throttle operation is to either install a test wheel propeller and use a test tank or to run the boat in the water under load. I could shut the boat off and let it sit for 5 min and it would run again fine for about 5 min. The first thing you’ll want to do is take a look at the clear sight bowl at the bottom of the filter, if this is the type of filter you have—some fuel filter/water separators are enclosed in a single unit with no sight glass. Check out the carb, its probably not set right, adjust the idle pin. Honda outboard motors are among the finest on the market. If you’ve got a mud wasp nest you’ll want to zap the wasp with wasp and bee killer first, and then clean out the muddy residue, trying not to get any down the fuel vent hose. These filters sometimes become clogged or filled with water, causing an engine to run poorly. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. That is possible as you would not be getting full throttle. Still, there are others of us out there that have older, more temperamental outboards and, believe it or not, even relatively new outboards can act up at times. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. And, always add fuel stabilizers designed to combat problems associated with ethanol fuel at every fill up. Fuel in the last couple of years now has up to 10% ethanol. You may want to have it professionally filtered, as the presence of too much water can cause engine problems. Make sure someone knows how a timing light works. Prevention: It's … We are open and working our normal schedule. Approximate length of running time when operating a motor at full power can be determined with a motor’s amp draw and the battery amp hour rating. Other fuel filters, such as those aforementioned fuel injector units, and vapor separator tank filters, should be changed by the pros. It’s important to note that once you remove this filter you can’t examine it and reinstall it. any ideas? Attach it to your motor and see if the problem goes away. The good news is that there are many tutorials online for diagnosing and repairing ignition system components in older outboards yourself, versus taking the engine into a shop for repairs. Answer Save. If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can’t see inside it. Air leaks in the fuel line are typically created through either natural wear or damage to the line. ... 1999 Yamaha 200 salt water series 2 stroke V6 Not rated yet I have been experiencing intermittent lost of power on my outboard. If you do find a clogged vent, simply clean it out with a pair of tweezers. When your outboard starts right up, keeps running with throttle applied in neutral, but shuts down the moment you come back to idle speed in neutral, the issue is likely to be a sticky or broken AIS (automatic idle speed) valve. That would cut down on the air flow. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. I took the boat out today and it started fine, got out in the open water turned the motor off and drifted then tried to start it and it did nothing, there's absolutely no power getting to the ignition switch and i'm not sure why, this is the first time i've owned a boat so yeah. The only way to permanently fix an air leak is to replace the entire fuel line, as plugging it up will likely result in future problems later down the road. There are a few possible causes to missing power from an engine and here are a few things to ponder: Your engine may have old gas in the tank. Another trouble spot in the fuel delivery department—if you’ve got a portable tank setup—are the snap-in connectors that attach the fuel line to your outboard. Install a submersible bilge pump yourself, like a seasoned marine professional. Your boat may operate just fine, and then all of a sudden its speed drops to a crawl. Wasps, spiders, and other critters are well-known for clogging these fittings up, and that can significantly affect engine performance. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. If you don't, a clogged filter will seem like a minor issue. We explore the three big issues that can be causing the problem as well as why outboard run out of fuel. Engines are finely tuned machines and an outboard engine might be a modern four-stroke model or an older two-stroke version and should it misfire, then something is not right. When it acts up have him check each plug wire separately for spark. Last, always use fresh fuel. motor runs great after leaving boat ramp, once i slow down to do some scouting for ducks i try get back on plane and motor has very little power. You can do this with engine off advance the throttle to wide open throttle make sure the throttle [plates are full open and that the timing is … motor does not sound like it is missing and no vibration. They are inexpensive can be changed with a few tools. Some problems can even be solved with the twist of only two fingers. Re: not getting up to full speed Get a timing light and a buddy. The presence of water is a tipoff that you may have a bad load of fuel in your boat. I am not sure what prop it has but I know the book says to size it I should run the motor full and straight and be tached out at around 5400 rpms (mine goes to about 4300 before it bogs down). Re: Motor was running fine then lost power suddenly/ little update I have a 1990 Suzuki 90 HP and it did the same thing, it runs just not at speed it is a … If not its the fuel pump or filters on your motor. A good set of marine binoculars can add to safety on the water. Lost power at 3/4 to full power and would stall. Evinrude 225 outboard 1986 Not rated yet Had motor running tryed to start back and now its not firing jiggled wires on switch under center console and it firef and ran now its not firing again … 115hp 1985 evinrude Not rated yet I rebuilt the engine 2 specs with a C lock manual 120 lb in each cylinder engine will not rev the top RPMs it only does about 20 miles an hour on a 15 … No excuses. It’s related to Murphy’s Law of Boats. Their condition can also indicate lurking internal problems, too. But … Another possible cause is an air leak in the fuel line. 0 0. When the motor is not energized it takes added power to start it rotating. Air leaks may also occur when the fuel line begins to rot and decay – a process that usually takes years. The difference is quite marked, 1st my wife can now start the outboard from cold, a couple of gentle pulls on full choke has it running, ... We had to run it hard for some time to get it back to full power as I had to … Submersible Bilge Pumps: Installing One Like the Pros. If it isn’t, it will cause your engine to become fuel starved, run rough, and eventually stall. Newer, fuel-injected outboards can have as many as 12 of these filters—two or three primaries and one or more for each fuel injector. Most outboard motors will run without a load to any particular RPM you like, including much too fast. One possible reason why boats no longer achieve appropriate speeds at full throttle is a spun prop. If the line is punctured with a sharp object, for instance, it will create a leak. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). Does your boat chug along at a snail’s pace, even when it’s operating at full throttle? just bought a boat with a 40hp outboard, it start and runs fine, it goes at low speeds fine, but as soon as i get to about 3/4-full throttle it boggs down and looses power, almost cutting out. For more information check out our eco friendly boating guide. If your outboard is running rough but you’ve checked your fuel vent and it’s clear, disconnect the fuel line and give the outboard end of the connector a good examination. I suggest you check for fuel line leaks or it may be sucking air into the line. Bout a 1998 150hp ficht evinrude motor.It wont take off ,its sluggish and fouling plugs. Once you’ve located the filter, give it a thorough inspection. Towards the end of the video can be seen a power drop. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. If you’re a little nervous about rebuilding one yourself, enlist the help of an engine shop pro. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. Favorite Answer. There are kits your engine shop can sell you that often include these and other components needed for a rebuild. Example: A single 120 amp hour, 12-volt battery and a 12-volt trolling motor drawing 30 amps at the highest speed setting will run for about 3.4 hours. This occurs when the bond between the propshaft and blades are broken, which subsequently causes the rubber insert to spin independently. Have you checked your propeller for debris? Depending on the severity of the problem, it could leave your boat dead in the water unless the problem is fixed ASAP. 10 Electrical Problems Every Boater Should Watch Out For. Afterward, inboard/outboard (I/O) owners should remember to vent the engine box thoroughly before restarting. The information contained in both will help you avoid damage to the motor, your boat and the environment. Motor's not turning but about 4800rpms at full throttle . Luckily most are a relatively inexpensive purchase. i have a 2003 50hp mercury two stroke. If we had a dollar for every time our boats started sputtering and running rough because we forgot to open the fuel vent on our portable fuel tanks, well, we’d have quite a few bucks rolling around. Well I put a new fuel filter on it and that didn't fix the problem. It’s only the primary onboard fuel filters that are owner-serviceable on most modern outboards—especially larger four-strokes—and even those usually require a proprietary tool to remove them. does not stall out. When this occurs, there’s a constant fluctuation in the amount of fuel that’s pumped to the boat’s carburetors, and as a result, the motor’s RPMs go up and down. The boat’s motor will still operate and function as it should, but the lack of a connection between the propshaft and propeller blades drastically reduces the boat’s top speed. Could leave your boat dead in the fuel line begins to rot and decay – a that! Of purring joined: Jul 2018... if it stays running it for 5... Does not sound like it is missing and no vibration hard to start once the prime is lost little! Engine, much less in an outboard common malfunctions knock away any gum,,... All of a sudden its speed, too then while running, the presence of water a... Engine box thoroughly before restarting safest method of shopping outboard motor not running at full power now during COVID-19... Last year at the end of the water pushing the boat the motor will out! 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