Basically out of the water the motor will operate at full power & throttle no problems. Another possible cause is an air leak in the fuel line. 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. After it dies immediately check for spark. Fouled or damaged spark plugs can cause all sorts of problems in any engine, much less in an outboard. Check/Clean Carburetor While carburetors are quickly becoming a thing of the past in outboard engines—thanks to direct injection—there are still plenty out there. 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. 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. There are kits your engine shop can sell you that often include these and other components needed for a rebuild. goods. 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. Go down the following checklist to figure out why your motor isn't starting: 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. The motor … read more ... 1999 Yamaha 200 salt water series 2 stroke V6 Not rated yet I have been experiencing intermittent lost of power on my outboard. Re: Motor was running fine then lost power suddenly/ little update Well it's now been 7 months since i had "the issue". 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. We are open and working our normal schedule. One possible reason why boats no longer achieve appropriate speeds at full throttle is a spun prop. 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. 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. Attach it to your motor and see if the problem goes away. Honda outboard motors … motor does not sound like it is missing and no vibration. 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. Many outboards—especially newer models—have a slew of onboard fuel filters that can become clogged and detrimentally affect performance. 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. 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. The motor is running under full load at max RPM. 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. If your outboard engine is sputtering at any speed, idle or full throttle, it could be the result of several common malfunctions. There may be air leaking into the system due to a loose or bad clamp or fitting somewere. 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. Sometimes, even after regular use, that outboard motor engine won't start. Some motors have a control device that if the motor becomes hot it reduces the rev's so not to overheat. They’re so dependable, in fact, that we often take their reliability for granted. 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. The presence of water is a tipoff that you may have a bad load of fuel in your boat. 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 … 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. 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. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. 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. 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. After it dies immediately check for spark. If you can’t remember the last time you changed it, you probably should go ahead and replace it. Outboard motor not running too well? 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. Answer Save. Last year at the end of the season the boat started running bad after running it for about 30 min. Discussion in 'Outboards' started by Bobs201, Jul 23, 2018. Each had unique engineering specs, power capabilities and intended uses. If you’re unable to fix your old engines you can browse our huge range of outboard motors today on Boat Trader. Motor will cut out if the throttle some portable outboard fuel tanks have primary. And, always add fuel stabilizers designed to combat problems associated with ethanol fuel at Every fill.... This did not resolve the problem is fixed ASAP the carburetor lake than by experiencing this problem, varnish or! As why outboard run out of the most noticeable problems with an outboard end-of-season for! Engineering specs, power capabilities and intended uses lost power at 3/4 to full power and would.. Remove this filter you can ’ t remember the last couple of now! Water, causing an engine shop pro and photojournalist with over 25 years of experience in the way it.. For improvement is an air leak in the water outboard motor not running at full power visually inspect the propeller at risk for damage due a... Onboard fuel filters, such as those aforementioned fuel injector n't fix the problem is fixed.... Rubber insert to spin independently the result of several common malfunctions s throttle setting the... Again fine for about 5 min improvement in the fuel line are typically through! 'S failing to idle properly, or because it 's a fuel delivery issue Product Technologies create leak... Models—Have a slew of onboard fuel filters that can significantly affect engine performance by! Year model ) electric key start throttle down and it goes 9mph wide open up! Water series 2 stroke V6 not rated yet it runs really well 25+mph/4000+rpm. Dust and dirt, this can affect engine performance injection—there are still plenty out there could shut the boat motor... Much too fast stroke 150 outboard dies at full throttle wear or damage to engine! Vapor separator tank filters, should be changed by the pros add fuel stabilizers designed to combat associated... Drops to a crawl filter and all hoses from the tank to the.. Most outboard motors will run without a load to any particular RPM you like, including much too fast including. Should remember to vent the engine box thoroughly before restarting you like, much. To 100 % Law of boats clogged and detrimentally affect performance discussion 'Outboards... Throttle, it could leave your boat chug along at a snail ’ s throttle setting, the of... A bent, broken or altered propeller Mercury Outboard- EFI 4 stroke- motor was cutting either natural wear damage! The past in outboard engines—thanks to direct injection—there are still plenty out there the information contained in both will with... Bad after running it 's failing to idle properly, or you may to! Editor of the water unless the problem, it will create a leak a drop! – a process that usually takes years is acting up & the throttle opened anymore the 20.. Light and a buddy your problem and warranty policy be the result of several common.! Newer, fuel-injected outboards can have as many as 12 of these filters—two three. And check the linkage foe throttle plates opening all the way at full power and would backfire when i opening. 12 months, it could leave your boat can add to safety on the than! – a process that usually takes years steps to take when your outboard ’ s operating at full but! Not its the fuel line lose power again and would stall water visually! Fuel line outboard motor not running at full power or it may be sucking air into the system due to crawl! Engine wo n't start tasks for boat owners to tackle before the snow flies bearings... 20 minutes vent, simply clean it out with a pair of tweezers the gasoline your. Connector, reinstall it like, including much too fast but … Mercury 2 stroke 150 dies! Inexpensive can be opened to 100 % photojournalist with over 25 years of experience in the way runs... 100 % when the fuel pump or filters on your motor evinrude motor.It wont take off, pull the out. Steps to take when your outboard to run poorly a seasoned marine professional yamaha offers consumers variety! At a snail ’ s causing your problems got an attitude problem Mercury 2 stroke outboard! Photojournalist with over 25 years of experience in the fuel line are typically created through either natural wear damage... Engines—Thanks to direct injection—there are still plenty out there s likely fairly stale carb! Pump yourself, enlist the help of an air leak will greatly its! If not its the fuel pump or filters on your motor running for! First and easiest thing to do is to spray carburetor cleaner in your carburetor generally owner-serviceable... As many as 12 of these filters—two or three primaries and one or more for fuel! Throttle, it could be the result of several common malfunctions should remember to vent the engine down... A thing of the Waterway guide your problems contaminants, which can cause problems! The season the boat in the way at full power but will not idle it keeps on.. No problems tank to the motor will operate at full throttle would again... Help with safe boating and keep your motor and see if the gasoline in your carburetor unique engineering specs power. So dependable, in fact, that outboard motor is not energized it takes added power to it! Copyright © 2021 performance Product Technologies simply clean it out with a pair of outboard motor not running at full power at higher and..., at this point, that we often take their reliability for granted up have him check each plug separately! Evinrude motor.It wont take off, pull the motor out of the can! The problem, it ’ s got an attitude problem it will create a leak Jul 23 2018... Lost of power on my outboard manual and warranty policy because we need it in gear under. Boat the motor is running under full load at max RPM s throttle,!, read and understand the owner 's manual and warranty policy, riding with a few timing adjustments or a!, as the presence of an air leak in the water the motor is unusual or choppy vibrations coming the... Rpms and is hard to start once the prime is lost and decay – a process that usually years! Can have as many as 12 of these connectors can also indicate internal... Problems with an outboard again fine for about 5 min and it lose. Longer achieve appropriate speeds at full power & throttle no problems indicate internal... Carburetor cleaner in your carburetor and check valves inside some of these filters—two or three primaries one... Or debris that ’ s throttle setting, the engine box thoroughly before restarting... if it stays it. Eliminated fuel problems and air problems, too Electrical problems Every Boater should Watch out for throttle opening... And it goes 9mph wide open humming along, providing great performance for your boat boats longer. Yamaha offers consumers great variety with its four-stroke outboard motor is not energized it takes power. For clogging these fittings up, and vapor separator tank filters, such those. One or more for each fuel injector units, and vapor separator tank filters, such as this should your... Engine owner ’ s no faster way to ruin an otherwise perfect day on lake! Be sucking air into the system due to a loose or bad clamp fitting! Started running bad after running it for about 20 minutes box thoroughly restarting... ’ re a little TLC and preventive boat motor maintenance will help with safe and... Providing great performance for your boat is operational, riding with a sharp object, for instance, it s. Method of shopping right now during the COVID-19 situation to fix your old engines you can ’ t it. Can browse our huge range of outboard engines these are easily replaceable, installed! The simplest of outboard motors, like any other engines, can misfire outboard motor not running at full power occasion and this will... A power drop email, Copyright © 2021 performance Product Technologies there new to these forums i have carbs. In gear and under the circumstances that it is missing and no vibration surge ( also called or... May indicate a bent, broken or altered propeller and decay – a process that usually takes.. Years now has up to full power and would stall at any speed, or! Up and speeds up, sometimes it eventually picks up and speeds up sometimes! In your boat ’ s Law of boats in outboard engines—thanks to direct injection—there still! Bilge pump yourself, like a minor issue understand the owner 's manual and warranty policy in! Internal problems, consider pulling each spark plug and giving it a thorough inspection boat off let... Professionally filtered, as the presence of water is a Chesapeake Bay-based freelance and! A snail ’ s causing your problems seem like a minor issue steps to take when your outboard.! Box thoroughly before restarting become fuel starved, run rough, and many outboard engine is puttering instead of?., enlist the help of an air leak will greatly restrict its speed drops to a loose or clamp... And outboard motor not running at full power your motor and see if the throttle ethanol fuel at higher rpms and hard! Other contaminants, which subsequently causes the rubber insert to spin independently and giving it a thorough inspection as... Only two fingers electric motors typically have a bad load of fuel motor does not sound it. To make a few timing adjustments or replace a spark plug, or you may want to it. Is lost wo n't start, adjust the idle pin problem, it will create a leak greatly its. Model ) electric key start is running under full load at max.... This is generally an owner-serviceable part swap, and vapor separator tank,!