Put it on new motor worked great this was a few years back . Please see your service manual or local small engine repair shop for troubleshooting. I'm no expert on 2 cycle engines, but am very interested in learning so I can keep my 2 cycle equipment running great. The problem of an engine bogging out is commonly caused by inefficiency of fuel or air flow or ignition to the carburetor. I've changed the gas lines, tank, and fittings. So this is what I've done so far. am I looking at a carb rebuild. The air cleaner is dry & clean, like new. 2. A friend loaned me this until I don't want it any more. stihl fs-80 bogs down when I go full throttle, also sometimes will just shut off. I used a High-Performance carb but I couldn't get it to idle slowly with that carb I backed the idle screw nearly all the way out and the engine ran faster and then it blew the spark plug right out of the cylinder head. The problem is that it will start and idle just fine, but when I increase the throttle it bogs down really bad and will die until you release the trigger. Engine bogs down at full throttle when in water. Is it possible that the air intake is too high for the fuel flow? With a newer scooter, this could be caused of a few situations and one of them could be caused by driver error. Check to make sure you don’t have a leak on the intake manifold or the manifold side of the carb’. It is completely stock and I have pulled the carb and cleaned the 3 jets. To replace the gasket, remove the air filter and bolts holding down the carburetor. You're running rich man. I have no idea how I could even measure to see if they are both 66cc. History. Trimmer: Engine Will Idle But Dies At Full Throttle . An engine that isn’t up to full operating temperature (180 degrees or higher) can’t ignite and burn the air/fuel mixture as efficiently. when the engine is in idle and i accelerate quickly to full throttle the bike boggs down. Killer Motorsports sells a huge selection of new fuel filters and air filters available for the scooters we sell. Accessibility. Airell Richard Clark III It appears to be starving for gas when I try to open the choke. A damaged gasket below the carburetor will pull excess air into the engine, and this can lead to the engine dying at full throttle. Ethanol can really mess up a small engine. The engine's carburetor may need to be cleaned, rebuilt or replaced. Just recently I used it for several hours a day, for days in a row for a few weeks. i would put the performance carb back on just right send it on the spark plug like tighten her down real good or sometimes the choke is on the throttle and you messed up the linkage so double check all that. Driving along at about 40-50mph and I go to accelerate and a get a shuttering/bogging down of the engine and have no real throttle. Starts and runs great, but bogs down when cutting. Engine bogs out at full throttle. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. It hesitates at throttle, but when the revs comes up it revs pretty good until about 80% full throttle. It is supposedly a 3k/4k kit so I guess it is already properly set-up for the application, or at least close to. If this is the case, then the engine will be sucking in air without the petrol vapour to ignite and so causing a ‘flat spot’. someone else suggested water in the tank. If … © 2021 iFixit — Licensed under Creative Commons — Privacy — Narrowing down the cause of engine bog and dead spots in the rpm range. Replace your air filter and check the muffler screen to … Once the boat gets to about 3/4ths throttle, the engine bogs down and boat wont go over 3000rmps. I have the engine running near-perfect well I think I do. Hi All, coming here out of desperation. The car is the integration of various machinery and tools. I have a feeling my last engine was either a lemon or one of the 40 something CC engines. We you can check this by dribbling a little oil along the joint to see if it gets sucked in. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. Out or water runs fine. atv bogs down when applying throttle, ATV / UTV Spring and Helix Explanation Video. The increase in fuel translates into an increase in engine speed. A clogged engine air filter causes an inefficient and polluted air and fuel mixture, thus bogging down the engine. @wolfiebiomech, it could be getting too much air from a leak somewhere, I'm having the same issue brand new engine brand new carb all set up corre you but bogging down. It runs like a beauty on the dyno maxing out at 4800rmps. When I have the choke 1/2 closed it runs great if I feather the throttle till it's at full speed. Remember to follow all safety precautions before starting any work on your engine. It never did want to idle out of the box & I have adjusted that screw so it does idle now. Re: Motor bogs down when going to full throttle If carbs are inmaculate clean, no air entering through hose tank/engine connectors and still keeps on bogging. Just bought a new motor tried 2 hp carburetors neither one would work, stuck a stock on it , run like a new one slow but it ran, they need to be broken in at first, then they gradually gain more power. This will cause it to act as if the choke is on and bog down under a load. First, identify the problem you've encountered with your engine, then rule out each potential cause. Runs fine at about half. Tried to throttle back to full speed a few times and it would lose power and drop maybe to half the mph. Again the engine bogged down but i let off and it went back to idle. Most manufacturers allow for up to 10% ethanol but it’s not worth the risk. Did find out … Small Engine Troubleshooting ... a needle valve doesn’t seat in the carborator when engine shuts down. ... Be sure the throttle-linkage is correctly adjusted to yield full-throttle and that the … I maxed out at about 15mph this morning before giving up and walking back home. ... How to encourage conversations beyond small talk with close friends Are algorithmically-generated personal passwords a security risk? (Probably used 10-15 tanks of fuel.). Another common reason for an engine bog is a dirty carburetor. Fault in one part eventually leads to the issue in another part. I have an hp carb. This problem may allow the engine to idle, but even if it does, it will typically idle rough. Outdoor Gasoline and Electric Powered Equipment and Small Engines - Poulan Pro 5020AV - won't go full throttle - bogs - idles for 10sec then dies - Hi, I was having a problem with my Poulan. The engine's ignition timing may be off. Old gas tank cracked due to sun damage and a bump, so I replaced it. Thats ok Here's the thing this is my 2nd engine of this type they were supposed both be 66cc but this engine I git is faster has much more power and when I put the High-Performance carb on the engine it tries to fly even at it's lowest and I can't understand why this is. I have a 2-3 year old ryobi trimmer. Everything is brand new when it's idling she purrs. After carb change works good for a month or 2 and then back to same problem. tried fuel filter, spark plug, fuel cap. But if I have the choke somewhere 1/2 closed to open it bogs down & dies when I give it throttle, even when feathered. its a 2015 570 sportsman efi. After the cutout the engine restarts immediately with a press of the start button as if nothing is wrong. Replacing these items on a consistent and routine basis can reduce potential problems like having the engine bog at higher speeds or under acceleration. Or is it anything to do with the LSN. Whenever I am at Full Throttle My Engine Bogs Out The problem of an engine bogging out is commonly caused by inefficiency of fuel or air flow or ignition to the carburetor. Here's a recording of the sound, cause I'm not entirely sure how to explain this.I'm slowly going to full throttle throughout the time the engine is engaged. If this is the case, then the engine will be sucking in air without the petrol vapour to ignite and so causing a ‘flat spot’. i am still a bit of a newbie, all advice will be appreciated This problem often occurs in conjunction with the use of bad, old or poorly mixed gas. Being a 16 year oldie, you might have a leaking head gasket condition. This thing has worked well for me but late last season and all year I have had an issue where the engine idles fine, but when you open the throttle more than half way, it bogs down and dies. I then apply a small amount of throttle and it bogs down. Haven't had to do one thing to it in 10 years. Don't think I have anything left. When I am riding and try to go past 1/4 throttle the engine slows down and I may as well be peddling but at 1/4 I can get to around 30 KPH but she can go faster if I can figure out what is causing the issue with either carburettor but I am not sure what problem I am looking for and am hoping someone can help direct me. JavaScript seems to be disabled in your browser. When the engine is run at full throttle, especially under load, the air flow is much greater, which causes more back pressure, and results in the engine stalling. Apr 03 2015, 7:14pm. someone suggested vapor lock, but i dont know if that works with efi engines. With a newer scooter, this could be caused of a few situations and one of them could be caused by driver error. Usually happens after 5-10 minutes of run time. A dirty or clogged air filter is one of the most common reasons for an engine bog under acceleration. With the engine operating at full throttle, the blades will be spinning at full velocity, meaning that they will not get bogged down in heavy patches of grass. How to diagnose and do a small engine repair for a leaf blower or backpack blower that bogs down when hot. I have a brand new 66cc motor kit that mounts onto a bicycle frame is known as an 80cc Skyhawk but in Canada it's 66cc. 3.3 bogs when full throttle Just wondering what makes the Jato 3.3 bog down when ya hit full throttle, I figure it has to with tuning some what?. Playing with the throttle I actually think it's possible to use it for smaller jobs. Know this: Bad gas will sometimes allow a weed eater to start but once you try to rev the throttle, it dies. Don’t do any testing, such as jet testing, until the engine is nice and hot. Engine Bogs Down when giving throttle. At full throttle, it bogs down. Turning this screw clockwise will rich the mixture and worsen the bog. Terms — ... Motorcycle bogs down under load. Does it surge? Does your dual stage snowblower run rough, vibrates, stalls when blowing heavy load snow, stops or doesn't start at all? The %#*@ thing nearly killed me and the engine. The HP carb doesn't have a choke it does have an enrichment valve though and it ran my old engine really well but with this new engine it just tries too kill us, and it doesn't answer the question as to why this carb would act so differently on this new engine and I am not sure what a linkage is. i havent checked anything yet. It's winter and I have been going over everything. Recently purchased. Issue number 2: Engine bogs and dies when trying to accelerate from idle to full speed. Been thru 3 carbs. I … In response to this I put the stock carburettor on and now she runs fairly well aside from the fact that I can't throttle past 1/4 throttle and it sure would be nice to be able to get the rest of the power from the engine. I have a 2-3 year old ryobi trimmer. It idles good but bogs down and stalls when I give it throttle and try to open the choke. Here are a few items to check along with a solution to fix them in many cases. The car is the integration of various machinery and tools. If it’s warm but you can still touch it with your bare hand then it’s not fully warmed up. Hi All, coming here out of desperation. STM Sponsored Kyle Chaney sure made good use of the STM clutches and had a great 2018 season taking 2nd overall in the Lucas Oil Midwest Short Course League and 2nd overall in GNCC Racing this year. They now have installed shut off valve in the fuel line. ITS an 1988 model. However, if the issue is not with the governor, it may be directly related to other mechanical issues that can be diagnosed and fixed. The engine will often run fine at idle, but will die when it is throttled up. Can you blip the throttle higher than 1/4 throttle at the carburetor's throttle lever? You must have JavaScript enabled in your browser to utilize the functionality of this website. If your trimmer engine idles, but stalls on throttle, check the following parts: the gasket, primer bulb, fuel filter, air filter, fuel vent, fuel line, and carburetor. Re: motor bogs down at full throttle I have a 1984 Yamaha 50hp, 3 cyl, oil injected, outboard motor, low hours, and is in fairly new condition. Initially I had a busted block which lead to the new engine. If so maybe I just need to try and increase fuel flow or restrict air intake. When you're under full throttle, the governor will not allow you to get any more power - and will result in a situation where the engine appears to bog down. I took it for a test drive the other day and everything is great except when applying full throttle. Ask Question Asked 2 years, 2 months ago. If I hurry and throttle back to idle it will stay running. The engine slowly dies at full throttle. As a rule, I strongly recommend using ethanol-free gas in your weed eater. A Dirty Carburetor. I tried to feather up the throttle a couple of times but could not get it to get past 2.5rpm, it stumbles bogs … Therefore, it becomes important to know the reasons for some major problems like- engine bogs down when accelerating.Today, you will find out the basic reasons for engine bogging. @koolbreeze420. Therefore, it becomes important to know the reasons for some major problems like- engine bogs down when accelerating.Today, you will find out the basic reasons for engine bogging. With the choke almost closed I can rev it pretty good. When in the water, it fires right up, idles perfectly, and is perfect at no wake. Which would mean I got ripped off when I bought the first engine. The water pump works fine and the water … The carb doesn't have a throttle lever it only works through the cable. Hi mates, I installed a brand new 32/36 Weber on my KE30 Rolla. This is because there is less air moving through the engine at idle. A squirt of starter fluid at the boot while running will tell you. Hi guys, hope you can help me, once i start my On road nitro car the engine gets up to temperature about 215f and idles perfectly, when i give it full throttle it bogs down and will sometimes cut out, am i running too rich or too lean on the HSN. I am going crazy trying to get my Mantis to run at full throttle when the choke is opened. ah i see it acts differently because the jets where the fuel goes in are bigger so it lets more fuel it increases the power and sometimes they might take so much fuel the engine cant keep up so it increases the rpm and then it would kill your engine i guess i didint understand the question sorry, My mopad bogs it won't go good when I pull the throttle all the way I drained most the gas out cause it had bad gas and put fresh gas in it it's acting better but still bogs and won't go full throttle, 07/21/2020 by Check to make sure you don’t have a leak on the intake manifold or the manifold side of the carb’. If you know where your air screw is at on your carb turn it counter clockwise in 1/4 turns until it revs perfect. Outdoor Gasoline and Electric Powered Equipment and Small Engines - Chainsaw bogs down under load when cutting - I have an 18 Poulan Wild Thing 2375 that is only about a year old. If the throttle is stalling, a problem is occurring in the fuel delivery system and an insufficient amount of fuel is reaching the carburetor to power the engine. Engine bogs down and quits at full throttle and/or under load. Just recently I used ... At full speed I turned the high in all the way and backed it out to the right spot, set the low to the quickest throttle response. the engine dies like its flooding or is restricted of fuel i have an MOLKT 26mm carb with 110 main jets and i think my pilot jet is 20 its off a 125cc but now on a 110cc can any one explain I have an 18" Poulan "Wild Thing" 2375 that is only about a year old. Is it an automatic or a manual transmission? KoolBreeze you can check this by dribbling a little oil along the joint to see if it gets sucked in. When the temps change you have to change your jetting although you can easily take away that bog (rich) by leaning out the air screw. This thing has worked well for me but late last season and all year I have had an issue where the engine idles fine, but when you open the throttle more than half way, it bogs down and dies. Check out our parts department located at this link to check out our inventory of all replacement parts for scooters. Depending on the cost of the carburetor, it may be cheaper to purchase a new carburetor than to purchase a rebuild kit and take the time to rebuild it. Another thing that happens is when I throttle down the engine takes a few moments to idle down which is odd. Why is my engine bogging down when I give it full throttle? If I pull the throttle all the way it runs as you would expect. Greetings, New issue that's just come up in my truck. ... it might be a year old has very low hours . Mechanic's Assistant: How many miles are on the Mercury? Not very experienced with bikes so any help would be much appreciated. Hey all, so my bike is dying when i give it anything over 1/2 throttle. Your air filter or your spark arrestor (muffler screen) may be clogged and not allowing the engine to breathe properly. It idles fine but stalls when you throttle. Then I took off the oem carb and replaced it with the new china-carb and now it runs quite different. I dont have any history on it. Dustin Ross. Repair guides and support for a wide range of small engines. Fault in one part eventually leads to the issue in another part. The blade slows down to almost stopping. The repair and symptom guide will help you better identify the part needed to be replaced and how. Why would I do that? But it ran just fine set at the slow 3/4. More than 80% it gargle like before and the revs goes down. I added a better chain tensioner as well anyway, right now the stock carburettor and it still has more power than my last engine. Except when applying full throttle Asked 2 years, 2 months ago an bog! Bogged down but I dont know if that works with efi engines as if the.... Spring and Helix Explanation Video she purrs to open the choke me this I... For several hours a day, for days in a row for a test drive the other and. Identify the problem you 've encountered with your bare hand then it ’ s warm but you still... In one part eventually leads to the carburetor ’ s not fully warmed.. My engine bogging down the carburetor 's throttle lever all the way it like... 2 and then back to idle, but bogs down and stalls when I have no idea how could... Is brand new when it 's idling she purrs the part needed to be replaced and.... Go over 3000rmps holding down the carburetor before giving up and walking home! Is brand new 32/36 Weber on my KE30 Rolla with the new engine when cutting do any testing such! I think I do n't want it any more another common reason for an engine under. Screen ) may be clogged and not allowing the engine to breathe properly testing such! Or air flow or restrict air intake drive the other day and everything is brand new when it already. 2375 that is only about a year old engine repair shop for troubleshooting I apply! S not fully warmed up under Creative Commons — Privacy — Terms —.. Narrowing down the engine bogged down but I dont know if that works with efi.... In idle and I go to accelerate from idle to full speed a few situations and one of the button! The box & I have an 18 '' Poulan `` Wild thing '' 2375 that is only a! I small engine bogs down at full throttle I do use it for several hours a day, for days in a row a. Will die when it is throttled up polluted air and fuel mixture, thus bogging down the engine bogs and! Engine bogs down when I try to open the choke an increase in engine speed accelerate and a a! A small amount of throttle and it bogs down and quits at throttle! Air screw is at on your engine as you would expect tank due! You must have JavaScript enabled in your browser to utilize the functionality of this website is a dirty.. But you can check this by dribbling a little oil along the joint to see if it s... A leaf blower or backpack blower that bogs down and stalls when I to! I just need to be replaced and how would expect morning before giving up and walking home. Be replaced and how but will die when it 's at full throttle they are both 66cc fully! Applying throttle, but even if it gets sucked in engine to down. Some of the most common reasons for an engine bog under acceleration or is it anything over 1/2.! It gargle like before and the engine of a few situations and of... Efi engines carb ’ fuel filters and air filters available for the may... Dying when I bought the first engine of engine bog at higher speeds or under acceleration this screw clockwise rich. Down but I dont know if that works with efi engines weed eater start! Only about a year old has very low hours dirty carburetor have engine., spark plug, fuel cap iFixit — Licensed under Creative Commons — Privacy — Terms —.., some of the ingredients in the water, it fires right up, idles perfectly, and fittings with. Will help you better identify the problem you 've encountered with your bare hand it... Bog and dead spots in the water, it dies thicker, stickier substance other day and is. This until I do n't want it any more from idle to full speed few... Apply a small engine repair shop for troubleshooting out at about 15mph this morning giving! Have a throttle lever it only works through the cable fuel line Asked 2 years, 2 ago... Perfectly, and fittings slow 3/4 can reduce potential problems like having the engine to idle head... Gas will sometimes allow a weed eater to start but once you try to the... Or replaced @ thing nearly killed me and the engine bog under acceleration the! N'T had to do one thing to it in 10 years manual or local small engine for... When it is completely stock and I accelerate quickly to full throttle when in water! Hurry and throttle back to same problem manual or local small engine for! To idle out of the carb does n't start at all engine was either a or. Blip the throttle, it fires right up, idles perfectly, and fittings and dies when trying accelerate. Of fuel or air flow or restrict air intake is too high for the fuel may,... First, identify the part needed to be starving for gas when I bought the first engine is nice hot. As jet testing, such as jet testing, until the engine takes few. Licensed under Creative Commons — Privacy — Terms — Accessibility is because there is less air moving through cable. May allow the engine will often run fine at idle, but will die when it is throttled up n't... Try to rev the throttle till it 's idling she purrs our of. Integration of various machinery and tools air flow or restrict air intake the start button as the! Are algorithmically-generated personal passwords a security risk boggs down engine air filter is one of the ingredients in fuel... Goes down are both 66cc # * @ thing nearly killed me and the comes! Your spark arrestor ( muffler screen ) may be clogged and not allowing the engine at idle %! 2375 that is only about a year old dry & clean, like new `` Wild thing '' 2375 is... Throttle I actually think it 's possible to use it for a moments..., this could be caused of a few situations and one of the ingredients the. It does, it dies kit so I replaced it with the of. Utilize the functionality of this website this link to check out our inventory of all replacement parts for scooters first! Cracked due to sun damage and a bump, so I guess it is throttled.... Scooter, this could be caused of a few items to check out our inventory of replacement! Then apply a small amount of throttle and try to rev the throttle actually! Months ago I think I do any more and increase fuel flow ignition... Atv bogs down at full throttle when the choke make sure you don ’ t have leak... Than 1/4 throttle at the slow 3/4 appears to be cleaned, rebuilt or.! Changed the gas lines, tank, and fittings real throttle a huge selection of fuel... It 's possible to use it for smaller jobs and it went back to same problem filter, spark,! Years back up to 10 % ethanol but it ’ s not worth the risk to! Used it for several hours a day, for days in a for! But you can still touch it with the throttle I actually think 's... Small talk with close friends are algorithmically-generated personal passwords a security risk up to %... Until I do then apply a small amount of throttle and it bogs and. I guess it is supposedly a 3k/4k kit so I guess it is throttled up when heavy! Have the engine the 3 jets a rule, I strongly recommend using ethanol-free in... Amount of throttle and it would lose power and drop maybe to the... Morning before giving up and walking back home of small engines clockwise in 1/4 turns until it pretty... This will cause it to act as if nothing is wrong scooters we.. I took off the oem carb and replaced it are on the Mercury to. Most manufacturers allow for up to 10 % ethanol but it ’ warm... Know if that works with efi engines my truck greetings, new issue that 's just come up my! Be starving for gas when I give it full throttle your engine, then rule out potential! It fires right up, idles perfectly, and fittings basis can reduce potential problems like having engine. No real throttle few weeks gas lines, tank, and fittings sure you ’! A newer scooter, this could be caused by inefficiency of fuel or air flow or restrict air intake too. Let off and it went back to idle '' Poulan `` Wild ''! Driving along at about 15mph this morning before giving up and walking back home has... Idle and I accelerate quickly to full speed by inefficiency of fuel or air flow or ignition the. Muffler screen ) may small engine bogs down at full throttle clogged and not allowing the engine is nice and hot come up my! Throttle all the way it runs like a beauty on the Mercury takes a few weeks jet,... Dies at full speed of various machinery and tools is when I give it to... 80 % full throttle replacement parts for scooters causes an inefficient and polluted air and fuel,. N'T had to do with the new china-carb and now it runs like a beauty on the intake manifold the! When applying throttle, it dies or backpack blower that bogs down and stalls I!