50 horse yamaha rough idle Rebuilt the carbs with new gaskets, needles, and floats Jun 13, 2010 · Is it a 2-stroke or a 4-stroke? I had a mid 90s 40hp 2-stroke yamaha that i found would idle a little rough. In 2011 alone, the company featured 10 different four-stroke makes with dozens of different models. The Yamaha 115 4-stroke is a little on the expensive side but its popularity speaks for itself Common Yamaha 115 4-Stroke Problems & Troubleshooting hkhtt hj / Shutterstock Although Yamaha 115 4-stroke motors are superbly designed and well-engineered, you can still run into occasional problems. But don’t worry, we’ve got you covered! Yamaha F50TLHT Outboard Rough Idle and Backfire Troubleshooting F50TLHT often faces rough idle, sputtering, and backfiring due to carburetor or ignition system issues. Video and troubleshooting tips on how to quickly diagnose problems with an outboard motor that wont idle. I’ll also Mar 24, 2017 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. This mostly involves setting the idle mixture screw and idle speed screw. Fuel system issues can cause causing a rough running outboard. It has been a trouble free engine for the most part. May 31, 2021 · Troubleshooting 1989 Yamaha 50DETO 2 Stroke, Idle/Low rpm rough running 05-31-2021, 11:54 AM Hi, I'm after some advice as I have been trying to troubleshoot an idle/low rpm issue without success for a while now. Recently I have noticed the engine seems to be fuel deprived at idle and Jan 21, 2014 · Apart from possible idle issues, what gas are you running, is it ethanol free? When I had my 50hp 2-stroke and ran ethanol gas, it sputtered and killed sometimes at idle. Fresh powerhead about 25 hours ago. Here are 9 common reasons why an outboard dies at idle: Carburetor issues Idle settings not configured Water in the fuel supply Clogged fuel tank vent Malfunctioning idle air control valve Fuel system issues Faulty spark plugs Fuel injection issues Damaged thermostat Keep reading for an in-depth analysis of the most common causes of problems that make your outboard motor stall. Learn how to diagnose and resolve common idling issues in your outboard engine. Jun 2, 2025 · When your outboard will not throttle up, there’s plenty you can do to fix the most common issues and improve performance once and for all. Aug 18, 2011 · Hope you can help me with a intermittent rough idle problem. However once he comes off plane and goes to idle the engine runs rough and acts as though it's not running on all cylinders. Jun 9, 2003 · Re: Yamaha Four-stroke 225 runs rough at idle They are under a three year warranty but the shop hasn't worked on to many since this engine usually doesn't have problems. The motor starts perfectly everytime, as soon as you hit the key it is on. Procedure NOTE: A diagnostic tachometer should be used for Oct 5, 2018 · (Hesitation/Bogging On Applying Throttle) (Joe Reeves) This is a common problem and is usually caused by a sticking timer base under the flywheel or fouled, clogged carburetors, however… also check the carburetor linkages, compression, spark, and the timer base as follows. how to fix an outboard that won't idle. What do you check when your outboard idles and then dies? In this short video from Boats. Yamaha 2010, 150hp 4 stroke. Sep 3, 2024 · Discover the secrets to perfecting your Evinrude outboard's performance with our comprehensive step-by-step guide on adjusting idle. Oct 12, 2024 · Picture this: you’re out on the water, the sun is shining, and you’re enjoying a perfect day of boating. If the idle on your engine is to low it will vibrate Apr 18, 2011 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. May 30, 2024 · I have a 2004 Mercury 40 horse power 4 stroke (three cylinder) with EFI. Outboard motor designs vary depending on make and model, but all operate on similar principles. Discover steps to check fuel system, ignition, carburetor, idle speed, air intake & compression. Aug 20, 2019 · My Yamaha outboard was having a stalling, bogging down problem. Yamaha Fuel-Injected Models (various): While generally more reliable, fuel-injected models can experience issues with the idle air control (IAC) valve. The mechanic says it may need a coil pack? This engine only has 65 hours on it? Anybody have a clue on this? Jan 26, 2025 · How to Fix Outboard Problems Now: Rough Idle Table of Contents How to Fix Outboard Problems Now Ahoy Boat Lovers! No matter how well you care for your boat, outboard motors can eventually encounter problems. Rough idle and misfires in the 2006 Yamaha 150 four stroke can stem from vacuum leaks, fuel delivery inconsistencies, or ignition timing issues. I was able to re-start the outboard immediately and it ran like normal. At idle, this lack of movement is especially problematic because the engine isn’t cooling through forward motion. I adjusted the idle mixture screw on the carburetors to richen up the mix a little and that helped. today we dive in to find the culprit of a outboard running really crappy, and the outcome really surprised me personally but was super simple and maybe simpl In this video I tune an outboard to stop it stalling and idle. At idle it purrs along without issue. Check for vacuum leaks around intake manifolds and gaskets. Engine runs great on the top end just rough idling and idling in gear. to/42aJXUI May 12, 2016 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Normally you can't tell the thing is running, but a couple times per trip it will develope a rough idle (noisey and shakes). Aug 22, 2009 · Re: 50hp evinrude idle adjustment idle speed stop screw on throttle linkage. Most times it's in the 6 MPH zones, low speed and sometimes in neutral. Low speed running (1200 - 2400rpm) in forward gear is very rough, sounds like its running on 2 cylinders only and I need to throttle up to 75% throttle to clear this and as soon as she hits around 3200 rpm she signs nicely on all 3 . Mar 30, 2006 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Jul 22, 2007 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. after some research I figured it was the carburetor. This valve controls the amount of air bypassing the throttle plate at idle. It will even stall sometimes. I’ve noticed it idles good for the first few minutes then it starts to idle rough and die. How does your engine (choke) choke plates? enrichment valve? prime start? Prime start the needle is (open) when cold so fuel can flow it closes thru the electrical My 2020 8 HP Yamaha 4 stroke would start with the choke all the way out and then as soon as I would push the choke in it would cut off. Had the injectors flow tested and cleaned and now it’s not wanting to idle. But despite this great variety between different models, Aug 21, 2023 · Troubleshooting Outboard Idling Problems: A Comprehensive Guide for Smooth Performance. When in neutral it smooths out but when in gear it becomes noises and runs rough. Any ideas? Jun 15, 2010 · Re: Yamaha f115 4 stroke rough idle and stall Ok after cleaning the iac valve, testing the tstat, replacing the plugs, and installing new fuel lines and primer bulb. Nov 18, 2011 · Re: Yamaha 40 rough idle / stumble when accelarating and yes I have cleaned the idle What year is the engine? always give a complete model #! In order to prevent loading up double checking your float setting is always a good idea. Despite good spark plugs and compression, inspect vacuum hoses for micro leaks using a smoke test. This guide to troubleshooting why your Yamaha outboard motor stopped working addresses issues common to the majority of Yamaha outboard models. net, John will show you where to start if your outboard dies when it Jun 24, 2019 · After using the 50 horse 4 stroke again today, I had problems with it losing power at 4000 rpm, slowing and then stalling at idle. For rough idle and backfire on the Yamaha F50TLHT, inspect carburetor synchronization and float levels carefully. Suddenly, your outboard motor sputters, loses power, and leaves you adrift. Nov 10, 2023 · This comprehensive guide will cover the most common outboard engine problems that can cause rough running at low speeds. How to adjust Yamaha 40hp idle refers to the process of altering or modifying the outboard motor’s carburetor so that it causes the 40 horsepower boat engine to run smoothly while either May 28, 2015 · A friend of mine has a 2005, Yamaha 150Hp four stroke. If I barely bump the throttle up it smooths out again. The tag on the motor states an idle speed of 775 rpm in gear. Outboard dies when idling?Outboard won’t start? In this video we walk through 2 ways to fix idling issues in an outboard. A flushing attachment or test tank can be used. 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 20, 2014 · Motor is Yamaha 50 hp 2 stroke. com 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. We would like to show you a description here but the site won’t allow us. If it's a 4-stroke it should idle very smoothly. Mine idles at 1000 EMK54110 ADJUSTING IDLING SPEED w 8 Do not touch or remove electrical parts when starting or during operation. Each had unique engineering specs, power capabilities and intended uses. We recommend that you locate or download the repair manual for your specific engine for more information, and consult a certified mechanic over any uncertainties. 1998 model 50ejrw with jet drive. 8 Keep hands, hair and clothes away from flywheel and other rotating parts while engine is running. Apr 1, 2025 · What should you do when your outboard engine is puttering instead of purring? Luckily there are some common reasons outboard engines act up. Jun 22, 2015 · Idle seems a little rough with occassional misfires but idle holds around 900 rpm and no stalling/cut out. It’s a scenario that every boater dreads – the frustration of an outboard motor that was running smoothly one moment and then inexplicably loses power Fix Outboard Rough Idle and Stalling - Without Taking Off Carb Outboard Idle Problems | Outboard Won’t Idle | Outboard Engine Won’t Stay Running | Boats. It could give you an indication of which carb or cylinder is causing this condition. Outboard stalls when idling or at low rpm, no issues at higher rpm or full throttle. After about 20 hours run time, the idle is rough, and it slowly degrades until Aug 2, 2013 · I have a 50 hp Yamaha 4 stroke that only runs rough from idle to 3,000 rpm after 3,000 rpm it runs fine. See full list on engineaddiction. Jul 26, 2009 · Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. It also runs great while under way. A rough idle Carburetor issues could be the cause of the motor’s harsh idle. Jul 2, 2013 · After winter storage, my 2003 Yamaha 50hp 2 stroke outboard was running awful, and stalling in idle. Thermostats regulate water flow based on temperature, and circulation slows or stops when they get stuck or fail. this is a carburetor related video. Carburetor Linkages: Check the carburetor throttle butterfly linkages that lead from one carburetor to the another to When an outboard motor runs at speed but cannot hold an idle, it usually indicates a problem with the carburetor. net Evinrude 2 stroke 115hp hard to start ? This is a quick video on how to adjust the idle on an outboard motor in 60 seconds. Dosen't seem to effect performance, no change in RPM or speed. Tips to help you to adjust the idle in your outboard #boating #yamaha #outboardThis is one of the most popular tools for idle https://amzn. Why Does My Yamaha Outboard Overheat at Idle? An overheating engine at idle often indicates a thermostat problem. Once you start increasing RPM it starts to miss around 3,000 RPM and continues up to WOT around 5500RPM. Ran a whole can of Merc Engine Tuner through the carbs. Did you adjust the carbs on the water, in gear, and at idle? Revving up like that could be coming from a lean condition. Only item that I had to chase one time ended up being the spark plugs being the fix. Yamaha offers consumers great variety with its four-stroke outboard motor lineup. This video shows how to quickly diagnose the fuel system and rebuild the carburetors. Motor: 6HP Mercury 4 StrokeBoat: 1 How to adjust idle speed 1998 1999 2000 2001 2002 2003 Yamaha 50 horsepower 2-stroke, 3-cylinder outboard engine with models C50TLRW 50EJRX C50TLRX 50TLRY 50 Jul 8, 2013 · I have a 05 Yamaha F225 4 stroke that has developed a rough idle. You must take out and clean the carburetor, or replace it if necessary, to solve this issue. Get back on the water hassle-free with our expert tips. Jul 29, 2008 · My 2003 50HP Yamaha has had the carbs rebuilt and the engine tuned up in May. how to clean a carb for idle issues. Aug 8, 2023 · Yamaha 225 hpdiI have a 2003 Yamaha hpdi 225. A faulty IAC valve can cause a rough or stalling idle. Note the running after you pull each wire. I cleaned the carbs and plugs and it ran well for 10 Jul 27, 2023 · I have a 2016 Tohatsu 50 hp 4 stroke that I am the original owner of (550 hours). Diagnostic tools are often required to troubleshoot these systems. For outboard repair i Jun 2, 2025 · Frustrated with your outboard motor not running at full power? Here's all you need to know about these issues and how you can resolve them. The engine shown in this video is a Honda 40 hp engine. The engine will start and run and idle great on muffs. Jun 14, 2010 · Re: Video of Rough Idling Yamaha 40hp 2 Stroke Try pulling off one plug wire at a time, replace it then pull off the next one. Once he powers back up, the engine smooths right and runs great. They can answer questions for any Yamaha outboard model or horsepower. c C This procedure must be performed while the outboard motor is in the water. Jul 24, 2021 · 14 15-08-2016 19:05 Outboard dies when throttling up from idle bstowers Engines and Propulsion Systems 42 14-05-2015 08:32 My Diesel Starts - Then Dies Immediately Pubsnub Engines and Propulsion Systems 9 04-09-2012 11:00 Starts, Idles, then Dies + Stalls on Takeoff - YM 1GM10 nickj Engines and Propulsion Systems 16 18-07-2009 02:13 Recent Jul 25, 2013 · Re: 2006 50HP 4 stroke EFI Rough cold idle and surging (and stalling) at low rpm You may want to check the TPS (throttle position sensor) while the problem is occurring Could not get idle below 6 BTDC. Aug 20, 2014 · Motor is Yamaha 50 hp 2 stroke. In this video I'll go over some of the fuel system issues you may run into with a rough running outboard motor. Ok, the crashed boat rebuild has went great, now on our 3rd time out the boat started up and began to idle very high and putting it in gear was extremely dif We would like to show you a description here but the site won’t allow us. . Sounded Very bad on the Throttle and Idle. A spark plug that is fouled, worn, or has an improper gap is another problem that can result in rough idling. qqppgd ufmxtt bty gvvet qce dcess xqvsryk axhujdh wzj btqzl pkbm kzxj agqd gedzrg hwd