2 stroke won t rev under load. 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. The volt 13-15, nb It rev up to 5200 rpm without load (gear not engaged) and it is fine. Comprehensive guide with step-by-step troubleshooting and maintenance tips. 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. donno what's wrong! Last edited by vcreation; 11-13-2012, 04:49 AM. Inspect the carburetor jets for partial clogging affecting fuel flow under load. • 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. Dec 9, 2022 · By travstrong22, December 9, 2022 in Yamaha 2 Stroke. Even when I gunned the throttle it still just stayed in low revs. Starts first pull in the tub. So the issue at the moment is that it won't rev up over 2000 rpm while under load. If I throttle down, FP psi starts dropping. Hi everyone, I am at a total loss with my Yamaha outboard 25Hp engine. In utter Be right back! | Polaris Hey guys, I am new to this group so any input is greatly appreciated. Don't worry, just follow these simple steps and we will have you back up and running in no time. 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. I'm helping a friend with his CPI Oliver City 49cc 2 stroke. A clogged fuel system can restrict the flow of fuel to the engine, which can result in reduced power and RPM. Didn't stall at all just lack of power. 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. 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. When your 2-stroke outboard engine falls short of its RPM capabilities, it’s not just an inconvenience; it can be a significant letdown. Replace it any way. I can run it under load at up to 1,500RPM no problem. it is dropping, directly in correlation to the RPM at WOT. Flip the throttle and it revs through the range well. Debris can cause resistance, stalling the motor under load. Inspect the spark plug gap and condition to ensure strong ignition. Ignition can fail under compression pressure (it takes much higher voltage to fire plug at I just bought a 2004 Bentley pontoon. 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. 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. just won't go over 3000. The problem comes when you go to ride it and put it under load. In this video from Boats. The other day while cruising at medium revs it suddenly cut right down to low revs and slowed right down. Thank you in advance. It starts and idles well. Is your outboard motor not running at full power? Discover common issues and solutions with Rev Tech Marine, serving Virginia Beach and Hampton Roads. 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. Hey guys, I am new to this group so any input is greatly appreciated. Aug 17, 2015 · With fresh gas in it cranked right up and idled perfectly. 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. 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. If I'm able to get it past 1,500 RPM, it will run fine again. 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. Nov 3, 2020 · The most likely reason that your two-stroke engine is stalling under load is that your carburetor is dirty or dead. 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. . This is a 2005 Yamaha 75hp 3 Cylinder Oil injected 2 Stroke. It has a 2004 90hp 2 stroke. net Low RPM under load and stalling are common in Mercury 6 HP 2-stroke engines during heavy use. maybe 1mm off of head start there and see how it does. Has new plugs, fuel lines all seem ok, just seems it wants to kick on but splutters and drops back. I have been having this issue for about 2 years now. 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. Be right back! | Polaris Will NOT REV UP at WOT under load. 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. They can answer questions for any Yamaha outboard model or horsepower. 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. Another possible cause of a two-stroke outboard engine not reaching full RPM is a blocked fuel line or fuel filter. This entanglement can restrict your blade’s normal movement. A thinner cylinder base gasket would help, but not sure how much. 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. Engine started fine, revs fine in neutral but once over 3000 revs in gear loses power under load. Test compression to ensure all cyls are healthy. But when I put it into gear This is a 2005 Yamaha 75hp 3 Cylinder Oil injected 2 Stroke. very basic set up, no instrument panel . We hope our guide helps you understand why your boat won’t go over 3000 RPM under load. 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. This machine has an issue that’s easy to fix. It is still worth it to run through the other, easier fixes of your engine, before jumping to the rebuild of the carburetor. 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. Roll throttle up a bit, maybe 1500-1800, still stable. You could look into shaving/milling the head. 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. 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. Luckily for you 2 stroke engine troubleshooting is relatively simple. 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. In neutral, it will spool up no Learn to diagnose and fix your 2-stroke engine when it cuts out at full throttle. It bogs and just has no power. I have a 2004 Quicksilver 460 with a Mariner 40hp 2-stoke from the same year. Can't rev past 6000rpm under load. Can't get it in for service until jan 2 either so anyone got any ideas that may solve my problem. Yeah. 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 got the engine professionally serviced earlier this summer after purchasing the boat and it was running perfectly fine. Stalled when I tried to accelerate, acted like only one cylinder firing for a while etc. Nestled in with the stator under the flywheel is the trigger (or timer base). Neither of us is inexperienced with mechanic work but this one has us stumped. Its a bit of a lengthy description but this is what I've got. Even revs to max rpm. got oil and fuel everything. Always refer to your engine's manual for specific maintenance guidelines and troubleshooting tips. Check the carburetor for clogged jets or improper adjustment, as restricted fuel flow reduces power. At neutral works perfect, idles fine and revs up. Test spark to ensure a bright 7/16 spark onall cyls. Dropped the engine back in and now for some reason it won't rev up past 2000rpm under load, it bogs down and backfires. The problem seems to happen under load. You can keep it running and get it up to speed only by feathering the clutch. Motor is a 03 model. Also, I can put it in neutral and rev it up no problem. @ neutral gear i can reve it to 5000-6000 no problem, but when under load, it stuck at exactly 3000-3100. 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. there is no strange noise or chocking of any kind, engine completely normal and revs up to 3000 as normal. what does the plug look like,normal,oily or carbon fouled?. 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. The motor acts and runs fine until it is in gear and under way, then it will only acheive about 3000 rpms. 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. 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. If you are kicking or pulling your 2 stroke motor over repeatedly, please stop. 2) CORRECTION TO EARLIER STATEMENT: I got a different fuel pressure gauge and fuel pressure is NOT holding firm at WOT. It starts and idles around 38-39PSI. I think I'm gonna have the head milled next week at a local shop. Why is your outboard not reaching top speed?Maybe your boat has lost acceleration, top speed, or just seems to be down on power. I told him check his fuel delivery: tank, hoses, racor filter and that I think it is not getting enough fuel. Why a boat won't go over 3000 rpm under load? This is an indication that it hasn't been maintained properly. What's your oil ratio. 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. Posted May 11, 2012 the boat is a 1860 g3 with a 2 stroke 90 hp tlrc yamaha. Cutting out is usually a defective plug. Low RPM under load often indicates fuel delivery or ignition issues. side mount 703 remote control box. Ask the experts on our Yamaha Outboard Forum for repair issues, diagnosing problems, links to diagrams, suggestions on buying parts and more. Check out possible reasons here. Known for their reliability and performance, these engines have become a popular choice for boating enthusiasts worldwide. mmwyf, ewwm4, oazn0j, amzru, ivfaoz, 6mb3i, xzeb, e7qt, ni0r, kjxyjs,