2 stroke won t rev under load. @ neutral gear i can reve it to 5000-6000 no problem, but when under load, it stuck at exactly 3000-3100. In this video from Boats. Check out possible reasons here. Why a boat won't go over 3000 rpm under load? This is an indication that it hasn't been maintained properly. Inspect the carburetor jets for partial clogging affecting fuel flow under load. Motor is a 03 model. Low RPM under load often indicates fuel delivery or ignition issues. what does the plug look like,normal,oily or carbon fouled?. However, like any mechanical piece of equipment, there might be problems … Mercury 40 HP 2 Stroke Problems • Intro 2 CYCLE ENGINE BOGS DOWN AND WONT REV UP / HIDDEN CARB ADJUSTMENTS THEMOWERMEDIC1 150K subscribers Subscribe [FREE Guide] Learn how to easily tune the air/fuel screw on a dirt bike carb in just a few minutes:2 stroke - https://motocrosshideout. Can't get it in for service until jan 2 either so anyone got any ideas that may solve my problem. Has new plugs, fuel lines all seem ok, just seems it wants to kick on but splutters and drops back. Roll throttle up a bit, maybe 1500-1800, still stable. Neither of us is inexperienced with mechanic work but this one has us stumped. Always refer to your engine's manual for specific maintenance guidelines and troubleshooting tips. This machine has an issue that’s easy to fix. 2) CORRECTION TO EARLIER STATEMENT: I got a different fuel pressure gauge and fuel pressure is NOT holding firm at WOT. When your 2-stroke outboard engine falls short of its RPM capabilities, it’s not just an inconvenience; it can be a significant letdown. At neutral works perfect, idles fine and revs up. A thinner cylinder base gasket would help, but not sure how much. 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. In utter Be right back! | Polaris Hey guys, I am new to this group so any input is greatly appreciated. The problem comes when you go to ride it and put it under load. Nov 3, 2020 · The most likely reason that your two-stroke engine is stalling under load is that your carburetor is dirty or dead. Pulled the ignition switch out and check all the connections to make sure nothing broke loose or pulled apart, and then put a 12 volt light tester on it to check for power. very basic set up, no instrument panel . The motor acts and runs fine until it is in gear and under way, then it will only acheive about 3000 rpms. there is no strange noise or chocking of any kind, engine completely normal and revs up to 3000 as normal. I have spent approx Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. This entanglement can restrict your blade’s normal movement. Didn't stall at all just lack of power. I have a 2004 Quicksilver 460 with a Mariner 40hp 2-stoke from the same year. Boat Motor Won’t Stay Running or Struggles to Accelerate If your boat motor won’t stay running at higher speeds, inspect the propeller for entangled fishing line, rope, or seaweed. got oil and fuel everything. Starts first pull in the tub. The volt 13-15, nb It rev up to 5200 rpm without load (gear not engaged) and it is fine. This is a 2005 Yamaha 75hp 3 Cylinder Oil injected 2 Stroke. If I throttle down, FP psi starts dropping. Has the carb recently been cleaned? A dirty idle circuit can idle fine and rev like crazy, but bog and die as soon as the throttle is opened while under load. Probably the most overlooked part of the ignition system the trigger sends a signal to the CDI unit (power pack or switchbox) and tells it when to release voltage to the coil. I can run it under load at up to 1,500RPM no problem. This comprehensive guide aims to be your compass in troubleshooting and resolving the issue of a 2-stroke outboard engine that won’t reach full RPM. I have been having this issue for about 2 years now. A bog in your carburetor occurs when you suddenly lose power or Hi all, following on from the carb challenges this engine is becoming more frustrating Carb is re built. maybe 1mm off of head start there and see how it does. The boat has not been used for at least 2 seasons, and according to the past owner, has probably only had about 60 gal of fuel run through it for its whole life. I don?t know if this is normal when i changed the gas filter the old filter was full, when I installed the new filter it was empty do I need to fill up with gas the new filter before installing it. Motor will do great starting, idling, and running until pushed towards WOT then will drop RPMs over time I have a new Yamaha 30hp 2-stroke outboard. FIXED!! WHY A 2 CYCLE ENGINE IDLES, BUT WONT REV UP? HAS NO POWER ? DIES? THEN YOU MUST WATCH THIS! The L screw (the low screw) works in pretty much the same way other than that it’s designed to meter the amount of fuel for the low revs, rather than the high revs. If you are kicking or pulling your 2 stroke motor over repeatedly, please stop. Why? Jump to Latest 12K views 5 replies 5 participants last post by oneofbullet Feb 23, 2009 O The world of outboard engines is vast and filled with numerous brands and models, but one that notably stands out is the Mercury 40 HP 2-stroke engine. Any help would be appreciated as to why it would not go over 3300 rpm under load after it had been going so well There is nothing more frustrating as a boater than having a bog in your boat's carburetor. Its a bit of a lengthy description but this is what I've got. It starts and idles well. What's your oil ratio. Also, I can put it in neutral and rev it up no problem. Dec 9, 2022 · By travstrong22, December 9, 2022 in Yamaha 2 Stroke. Ignition can fail under compression pressure (it takes much higher voltage to fire plug at I just bought a 2004 Bentley pontoon. So the issue at the moment is that it won't rev up over 2000 rpm while under load. Debris can cause resistance, stalling the motor under load. If I'm able to get it past 1,500 RPM, it will run fine again. Test spark to ensure a bright 7/16 spark onall cyls. Aug 17, 2015 · With fresh gas in it cranked right up and idled perfectly. Comprehensive guide with step-by-step troubleshooting and maintenance tips. Thank you in advance. Known for their reliability and performance, these engines have become a popular choice for boating enthusiasts worldwide. Yeah. You could look into shaving/milling the head. It is still worth it to run through the other, easier fixes of your engine, before jumping to the rebuild of the carburetor. I got the engine professionally serviced earlier this summer after purchasing the boat and it was running perfectly fine. Is your outboard motor not running at full power? Discover common issues and solutions with Rev Tech Marine, serving Virginia Beach and Hampton Roads. But when I put it into gear This is a 2005 Yamaha 75hp 3 Cylinder Oil injected 2 Stroke. They can answer questions for any Yamaha outboard model or horsepower. Nestled in with the stator under the flywheel is the trigger (or timer base). com/carb/4 stroke - ht tansen Scoot Junior Posts: 14 2 stroke idles all day but won't rev !! Nov 24, 2013 16:01:02 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by tansen on Nov 24, 2013 16:01:02 GMT -5 Hey Everyone, new member here. Check the carburetor for clogged jets or improper adjustment, as restricted fuel flow reduces power. donno what's wrong! Last edited by vcreation; 11-13-2012, 04:49 AM. The other day while cruising at medium revs it suddenly cut right down to low revs and slowed right down. Even revs to max rpm. just won't go over 3000. Yamaha 115 2 stroke - Won't rev under load My son's 1993 Yamaha 115 2 stroke starts fine, revs up to 5000 rpm when not in gear. Cutting out is usually a defective plug. Posted May 11, 2012 the boat is a 1860 g3 with a 2 stroke 90 hp tlrc yamaha. It runs off the onboard fuel tank which had Stabil in it so I mixed some fresh gas and Does it refuse to rev onder any condition or only under load,does it cut out at high speed or just has no getup&go. Hey guys, I am new to this group so any input is greatly appreciated. I moored up and had a look at the prop and pulled some (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. It bogs and just has no power. And yes I took it because I can sense that the reason the lawn mower won’t rev up is because there’s a problem with its mechanism. I told him check his fuel delivery: tank, hoses, racor filter and that I think it is not getting enough fuel. Replace it any way. We hope our guide helps you understand why your boat won’t go over 3000 RPM under load. Hi everyone, I am at a total loss with my Yamaha outboard 25Hp engine. Another possible cause of a two-stroke outboard engine not reaching full RPM is a blocked fuel line or fuel filter. If your 2 Stroke Engine is Bogging and has No Power or very little power, this quick fix will get your engine racing again like it's new! STIHL Spark Arresto Hi Folks, This is my first post and I would greatly appreciate some advice. Put it on the water and under load and it runs fine one day dies Cruisers & Sailing Forums > The Fleet > General Sailing Forum 2 stroke outboard starts but then dies when throttled or idle. Once you pinpoint the cause and fix it, you should be cruising with ease in no time! Is your 2 stroke dirt bike bogging? Does it stop accelerating when you open the throttle quickly? If your bike has bogged going up a hill and caused you to stop, then you know how 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. I think I'm gonna have the head milled next week at a local shop. Test compression to ensure all cyls are healthy. A clogged fuel system can restrict the flow of fuel to the engine, which can result in reduced power and RPM. In neutral, it will spool up no Learn to diagnose and fix your 2-stroke engine when it cuts out at full throttle. It starts and idles around 38-39PSI. Any help would be appreciated as to why it would not go over 3300 rpm under load after it had been going so well Re: Motor will not accelerate under load. Luckily for you 2 stroke engine troubleshooting is relatively simple. Stalled when I tried to accelerate, acted like only one cylinder firing for a while etc. Flip the throttle and it revs through the range well. Dropped the engine back in and now for some reason it won't rev up past 2000rpm under load, it bogs down and backfires. • Intro 2 CYCLE ENGINE BOGS DOWN AND WONT REV UP / HIDDEN CARB ADJUSTMENTS THEMOWERMEDIC1 150K subscribers Subscribe If your 2 Stroke Engine is Bogging and has No Power or very little power, this quick fix will get your engine racing again like it's new! STIHL Spark Arresto Is your 2 stroke dirt bike bogging? Does it stop accelerating when you open the throttle quickly? If your bike has bogged going up a hill and caused you to stop, then you know how My 2000 Merc "Bigfoot" kicker after sitting since October 2008 was running poorly when I fired it up in the driveway. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Engine started fine, revs fine in neutral but once over 3000 revs in gear loses power under load. The problem seems to happen under load. Why is your outboard not reaching top speed?Maybe your boat has lost acceleration, top speed, or just seems to be down on power. side mount 703 remote control box. Motor will do great starting, idling, and running until pushed towards WOT then will drop RPMs over time Troubleshooting a 2-stroke engine that won't start can be a daunting task, especially if you're new to engine mechanics. it is dropping, directly in correlation to the RPM at WOT. I'm helping a friend with his CPI Oliver City 49cc 2 stroke. Replace radio shack switch used in place of ignition key Replace tires Adjust chain tension replace brake lever replace swingarm spools clean excess air filter oil from airbox drain old 2 stroke oil and replace with fresh motorex synthetic (for injection or premix) Flush/fill coolant free up front calipers 04-17-2010, 10:02 PM #2 lygilco Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. net Low RPM under load and stalling are common in Mercury 6 HP 2-stroke engines during heavy use. Don't worry, just follow these simple steps and we will have you back up and running in no time. Even when I gunned the throttle it still just stayed in low revs. You can keep it running and get it up to speed only by feathering the clutch. . Inspect the spark plug gap and condition to ensure strong ignition. Be right back! | Polaris Will NOT REV UP at WOT under load. It has a 2004 90hp 2 stroke. Can't rev past 6000rpm under load. If your Yamaha 30hp 2-stroke revs at idle but not under load, check the fuel pump diaphragm for subtle leaks despite no visible tears. aiy6i, ioytj, 1jkngg, 7ir4, 8sxziq, kuauh, xifq, qql0e, 0g99, mw2pw,