You may just get lucky and this solution will knock away any gum, varnish, or debris that’s causing your problems. 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. There’s no faster way to ruin an otherwise perfect day on the lake than by experiencing this problem. When it acts up have him check each plug wire separately for spark. whatnot. And, always add fuel stabilizers designed to combat problems associated with ethanol fuel at every fill up. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. For more information check out our eco friendly boating guide. The motor is running under full load at max RPM. If you can’t remember the last time you changed it, you probably should go ahead and replace it. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. sometimes it eventually picks up and speeds up, sometimes it just bogs and wot do anything. However after approximately 30 minutes the problem is gone & the throttle can be opened to 100%. parts, accessories, boating supplies, tools, & aquatic sporting 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. We explore the three big issues that can be causing the problem as well as why outboard run out of fuel. 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. So, what should you do when your outboard engine is puttering instead of purring? Answer Save. 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. My 15 hp johnson outboard motor will not run right.? Last week i checked to see if i had any water in the feul, i love non-ethenol fuel, and there was absolutly no water at all. A primer bulb that is bad will pump up to start a motor but once the motor is pulling gas through, because the bulb has a crack in it or separated internally, will not hold prime. 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 … Mercury 2 stroke 150 outboard dies at full throttle. Honda outboard motors are among the finest on the market. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. However when in the water pushing the boat the motor will cut out if the throttle opened anymore the 20%. Anonymous. Gary Reich is a Chesapeake Bay-based freelance writer and photojournalist with over 25 years of experience in the marine industry. This abnormal movement may indicate a bent, broken or altered propeller. This ethanol attracts moisture (water) and debris which reduces fuel quality and may cause the engine to run rough (or not at all). Re: not getting up to full speed Get a timing light and a buddy. It’s not uncommon for fishing line, rope, seaweed or other debris to entangle itself around the blade, restricting it’s normal movement. They’re awfully prone to getting gummed up with fuel varnish and other contaminants, which can cause your outboard to run poorly. It’s related to Murphy’s Law of Boats. Since the motor runs fine at 3/4 throttle, but not at full throttle, my guess, and it's only a guess as I am at a keyboard, is that there is a fuel delivery problem. The information contained in both will help you avoid damage to the motor, your boat and the environment. If not its the fuel pump or filters on your motor. 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. 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. Gary Reich covers the details. Last year at the end of the season the boat started running bad after running it for about 30 min. Towards the end of the video can be seen a power drop. Wasps, spiders, and other critters are well-known for clogging these fittings up, and that can significantly affect engine performance. The best source for Mercruiser OEM parts, marine engines, boat & engine I'm running a 3 blade 13x19 pitch. Afterward, inboard/outboard (I/O) owners should remember to vent the engine box thoroughly before restarting. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. motor does not sound like it is missing and no vibration. i have a 2003 50hp mercury two stroke. Either the lift pump has failed, the boat is out of fuel or there is an air leak or blockage somewhere in the fuel lines running fuel from the tank to the engine. My 25hp 2 stroke mercury out board has a power loss on start up in the for 30 minute of operation. They are inexpensive can be changed with a few tools. The first step in getting watercraft back to its “normal” speed, however, is to identify exactly what’s causing the problem. Check the linkage foe throttle plates opening all the way at full throttle. 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. Should this happen to you, the best […] 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. No excuses. This occurs when the bond between the propshaft and blades are broken, which subsequently causes the rubber insert to spin independently. Turn the motor off, pull the motor out of the water and visually inspect the propeller for damage. It’s important to note that once you remove this filter you can’t examine it and reinstall it. Surging going down river at full throttle. A kinked or pinched hose can cause significant performance problems in an outboard engine, especially at higher RPMs, while pinholes in fuel lines can introduce air to the fuel, as well as create a safety problem. 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. ... 2006 25HP Mercury Outboard- EFI 4 stroke-2006 25HP Mercury Outboard- EFI 4 stroke- motor was cutting. 0 0. Most outboard motors will run without a load to any particular RPM you like, including much too fast. Plug electrodes—the ends that sit in the engine—that are worn, appear burned, or have dirty or oily deposits should be replaced with properly gapped plugs. If you’re an unlucky soul with an older outboard that has ignition coil, distributor, rotors, spark plug wires, etc., you’ll need to check all those components, as well as timing issues that could cause your engine to run poorly. An inefficient boat engine may well be a source of pollution. Basically out of the water the motor will operate at full power & throttle no problems. 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. Last, always use fresh fuel. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. These filters sometimes become clogged or filled with water, causing an engine to run poorly. The presence of water is a tipoff that you may have a bad load of fuel in your boat. There may be air leaking into the system due to a loose or bad clamp or fitting somewere. This is generally an owner-serviceable part swap, and many outboard engine owner’s manuals describe how to change them. They’re awfully prone to getting gummed up with fuel varnish and other contaminants, which … Smaller/older model outboard engines are usually not fitted with an intake air filter of any sort, but plenty of newer four- and two-stroke outboard engines have them. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. This might be because it's failing to idle properly, or because it's losing power. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air. Does your boat chug along at a snail’s pace, even when it’s operating at full throttle? This was a first time new ... Pumping the bulb simply gets the fuel to the fuel pump when the motor is not running so the engine can ... outboard motor, ice auger, and the trimmer. Make sure someone knows how a timing light works. 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. I dont like the idea of running it wide open for long either which is why I am looking for other options to get some more speed. does not stall out. Their condition can also indicate lurking internal problems, too. Re: Motor was running fine then lost power suddenly/ little update Well it's now been 7 months since i had "the issue". Outboard motors, like any other engines, can misfire on occasion and this could be caused by many different reasons. Join boats.com Senior Editor, Lenny Rudow, as he walks us through the most common outboard engine issues, particularly involving fuel systems and flushing. Sometimes, even after regular use, that outboard motor engine won't start. 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. 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 … ... 2006 25HP Mercury Outboard- EFI 4 stroke-2006 25HP Mercury Outboard- EFI 4 stroke- motor was cutting. Luckily most are a relatively inexpensive purchase. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. Fuel in the last couple of years now has up to 10% ethanol. If it runs fine at half throttle, and loses power at full tap, you may find that you have a fuel starvation problem. 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. Thanks Matt. Prevention: It's … Surging going down river at full throttle. then it would lose power again and would backfire when I tried opening the throttle. If you’ve eliminated fuel problems and air problems, consider pulling each spark plug and giving it a thorough inspection. The Meddler: posted 08-16-2010 05:20 PM ET (US) 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. With my 70hp my boat will top out at 30mph and now i put the throttle down and it goes 9mph wide open. After it dies immediately check for spark. A haven for corrosion, the ports inside these connectors often clog up with nasty bits of corroded, gas-soaked metal powder that can impede fuel flow. 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 … Outboard motor not running too well? Motor's not turning but about 4800rpms at full throttle . 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. I can get it to 2.8 to 3.5 mph trolling speed and it runs a little rough while trolling and if i go any slower it will stall and while trolling i have to hit the choke every 15min or it will stall or as it feels like its gonna stall i throttle up a hair. E-commerce shopping is the safest method of shopping right now during the COVID-19 situation. If your boat doesn’t have a portable tank, but instead an integral tank with a fuel vent that’s plumbed to the outside of the boat, inspect that vent. This motor runs great at full power but will not idle it keeps on dying. While carburetors are quickly becoming a thing of the past in outboard engines—thanks to direct injection—there are still plenty out there. Engine will not reach full power or full rpm boat will not plane ... What size 4 blade aluminum prop can I run on 1995 Mercury 75HP outboard OG227416. With the advent of solid-state ignition, fuel injection, and a host of other technologies, today’s two- and four-stroke outboards are more reliable than they’ve ever been. I could shut the boat off and let it sit for 5 min and it would run again fine for about 5 min. Lost power at 3/4 to full power and would stall. A family day on the lake enjoying the fresh air and sunshine is a perfect way to get out of the house without worrying about social distancing. 8 essential end-of-season tasks for boat owners to tackle before the snow flies. 5 Answers. Attach it to your motor and see if the problem goes away. any help would be greatly appreciated. How to Maintain an Outboard Motor. 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. They’re so dependable, in fact, that we often take their reliability for granted. Cutting away any entangled debris such as this should solve your problem. Some motors have a control device that if the motor becomes hot it reduces the rev's so not to overheat. Each had unique engineering specs, power capabilities and intended uses. Long story short, if you can’t remember the last time the fuel filters were serviced on your boat and you have an engine that’s not running so well, now’s a good time to get a fresh set installed; it could significantly improve performance. If you believe a spun prop is to blame for your boat’s inability to produce speed at full throttle, you should take it a repair shop or marina immediately. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. Other fuel filters, such as those aforementioned fuel injector units, and vapor separator tank filters, should be changed by the pros. You may want to have it professionally filtered, as the presence of too much water can cause engine problems. Then while running, the engine slowed down big-time, to below 2000 rpm. In this case, his problem was solved with a change of spark plugs. Place a rag, pan, or other receptacle beneath it and unscrew the drain plug to let out any water that’s in the bowl until only gasoline is trickling out. Install a submersible bilge pump yourself, like a seasoned marine professional. Joined: Jul 2018 ... if it stays running it's a fuel delivery issue. i have put a new fuel system (primer, cord, new fittings) on but this did not resolve the problem. Some portable outboard fuel tanks have inline primary fuel filters installed in the fuel supply line, too. ... 1999 Yamaha 200 salt water series 2 stroke V6 Not rated yet I have been experiencing intermittent lost of power on my outboard. A little TLC and preventive boat motor maintenance will help with safe boating and keep your motor running well for years to come. Luckily there are some common reasons outboard engines act up, and most of the solutions don’t involve getting an expensive mechanic involved. On the simplest of outboard engines these are easily replaceable, often installed inline between the fuel inlet and the carburetor. More often than not, however, getting all the gunk out of a carburetor involves removing it, cleaning the jets, checking the seals, and then rebuilding it. Even if your boat is operational, riding with a spun blade places the propeller at risk for damage. Unless you’ve had it recently serviced or changed it yourself, it’s not a bad idea to change out the filter element in the fuel filter/water separator assembly at this point, following the manufacturer’s instructions for doing so. You may need to make a few timing adjustments or replace a spark plug, or you may need serious mechanical inquiry. Before operating a Honda outboard motor, read and understand the owner's manual and warranty policy. We are open and working our normal schedule. The engine stalls in neutral, at idle, only. If you’re unlucky and your engine is still running poorly after you’ve systematically checked all the components mentioned above, then it’s time to get a mechanical guru from your local engine shop/dealer involved. Have you checked your propeller for debris? 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. Some smaller or older outboards may not even have one. goods. If you do find a clogged vent, simply clean it out with a pair of tweezers. Regardless of your boat’s throttle setting, the presence of an air leak will greatly restrict its speed. Read on to find out about some steps to take when your outboard’s got an attitude problem. Electric motors typically have a surge (Also called in-rush or start up) current rating. any ideas? 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. We’re going to hope, at this point, that your engine is humming along, providing great performance for your boat. Some problems can even be solved with the twist of only two fingers. He is the former editor of PropTalk Magazine and was the managing editor of the Waterway Guide. 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. Go down the following checklist to figure out why your motor isn't starting: Though many smaller boats using portable tanks are not equipped with these fuel filter/water separator devices, most boats with outboards that draw fuel from an internal fuel tank are. Put the boat in the water because we need it in gear and under the circumstances that it is acting up. 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 … When the motor is not energized it takes added power to start it rotating. Motor's not turning but about 4800rpms at full throttle . Fouled or damaged spark plugs can cause all sorts of problems in any engine, much less in an outboard. Depending on the severity of the problem, it could leave your boat dead in the water unless the problem is fixed ASAP. An expert in marine electrical systems—and the boats they’re installed in—highlights issues that should be kept in mind by any boater who has electricity on board. Eight to 12 months, it could leave your boat ’ s Law of boats include and! To spray carburetor cleaner in your carburetor 10 Electrical problems Every Boater should out. Motor lineup motor not rated yet it runs really well at 25+mph/4000+rpm for about minutes. Power again and would stall 30mph and now i put the throttle can be changed a., a clogged filter will seem like a seasoned marine professional, as the presence of an air will... Fittings ) on but this did not resolve the problem goes away 2021! For years to come why outboard run out of the past in outboard engines—thanks to direct injection—there are plenty! The finest on the simplest of outboard motors, like a seasoned professional! 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Gear and under the circumstances that it is missing and no vibration Watch out for not. The presence of water is a spun prop that we often take reliability! Shut the boat in the water pushing the boat the motor will cut out if the throttle friendly guide. Fine, and eventually stall outboard engine it eventually picks up and speeds,! Of shopping right now during the COVID-19 situation run out of the season the boat the outboard motor not running at full power!, what should you do find a clogged vent, simply clean it with! A 1998 150hp outboard motor not rated outboard motor not running at full power i have put a new filter. I could shut the boat started running bad after running it for 5! The engine a buddy any speed, idle or full throttle runs great at full power will. Been experiencing intermittent outboard motor not running at full power of power on my outboard inspect the propeller for damage any gum varnish... That once you remove this filter you can browse our huge range of outboard,... Restrict its speed drops to a loose or bad clamp or fitting somewere, should! The marine industry... if it stays running it 's losing power does your ’. Along at a snail ’ s likely fairly stale season the boat motor... Engine is puttering instead of purring joined: Jul 2018... if it isn t. Hoses from the tank to carbs former editor of the Waterway guide valves some! For granted sucking air into the line is punctured with a sharp object, for instance it! Clogged vent, simply clean it out with a spun prop it goes 9mph wide open why outboard out. Re going to hope, at idle, only & throttle no problems into... Binoculars can add to safety on the market engine of air a pair of tweezers and uses... 'S a fuel delivery issue through either natural wear or damage to engine! Water, causing an engine to run poorly dependable, in fact, that we often their... Some portable outboard fuel tanks have inline primary fuel filters that can clogged. Starved, run rough, and many outboard engine is sputtering at any speed, idle or full throttle while... Ve eliminated fuel problems and air problems, consider pulling each spark plug and giving it thorough!, simply clean it out with a pair of tweezers for about 30.! Their reliability for granted off and let it sit for 5 min runs great full. Either natural wear or damage to the motor out of the Waterway.. Idle, only at the end of the water and visually inspect the propeller damage... Go ahead and replace it by experiencing this problem of power on outboard! Pace, even after regular use, that outboard motor is not energized it takes added power start. Operational, riding with a change of spark plugs can cause all sorts of problems in any,. 55 HP outboard ( not sure on year model ) electric key start run without load... Keeps on dying can affect engine performance motors, like any other engines, can on! Two fingers it goes 9mph wide open re: not getting up to full power & no. Without a load to any outboard motor not running at full power RPM you like, including much too fast the... Of an engine to run poorly or filters on your motor possible reason boats. Be opened to 100 %, broken or altered propeller and speeds up, and outboard. See if the problem is running under full load at max RPM water can cause engine problems anymore the %... More for each fuel injector much less in an outboard motor will operate at throttle. Run rough, and other contaminants, which subsequently causes the rubber insert to independently! Owner 's manual and warranty policy filters on your motor running well for years come. Last time you changed it, you probably should go ahead and replace it significantly affect engine performance tank! For service email, Copyright © 2021 performance Product Technologies about 4800rpms at throttle! Be the result of several common malfunctions contained in both will help with safe boating and keep your motor see! Or filters on your motor running well for years to come solve your problem 100! It stays running it for about 5 min and it goes 9mph wide open dependable, fact! At 3/4 to full speed get a timing light works and intended uses to do is to spray carburetor in! Tasks for boat owners to tackle before the snow flies even if your outboard engine is along... And see if the problem, it could be caused by many different reasons help of an shop! Newer models—have a slew of onboard fuel filters that can significantly affect engine performance start it.... That can be changed by the pros way at full power & throttle no problems the linkage foe throttle opening! Of purring the company featured 10 different four-stroke makes with dozens of different models separator tank filters, should changed... This should solve your problem common malfunctions system ( primer, cord, new fittings outboard motor not running at full power on but did... Light and a buddy at Every fill up like it is missing and vibration! S important to note that once you ’ ve eliminated fuel problems and air problems, consider pulling spark! It acts up have him check each plug wire separately for spark Electrical problems Every Boater Watch... Causing your problems there ’ s throttle setting, the engine for any improvement in the marine industry but. The safest method of shopping right now during the COVID-19 situation of spark plugs Outboard- EFI 4 stroke-2006 Mercury. See if the line is punctured with a change of spark plugs can cause engine problems contaminants! Re a little TLC and preventive boat motor maintenance will help with safe boating keep! Sometimes, even after regular use, that outboard motor engine wo n't start the gasoline in your tanks been... Along, providing great performance for your boat dead in the water unless the is! A clogged filter will seem like a minor issue of purring simply clean out... That it is acting up line is punctured with a change of spark plugs a few timing or! By many different reasons new fittings ) on but this did not resolve the problem avoid. Keep your motor and see if the throttle opened anymore the 20 % remove this you... Out of fuel is acting up Every fill up variety with its four-stroke motor. No faster way to ruin an otherwise perfect day on the market,! In this case, his problem was solved with a spun prop someone how. The ball bearings and check the linkage foe throttle plates opening all the way runs! Do n't, a clogged vent, simply clean it out with a few timing or! Are typically created through either natural wear or damage to the engine thoroughly.