Why you lawn mower or generator backfires/misfires and how to fix. EASY

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A lawn mower backfires when the air/fuel mixture in the engine's combustion chamber ignites prematurely, resulting in a small explosion. This can be caused by a variety of factors, such as a clogged air filter, a faulty spark plug, or an improper fuel-to-air ratio. Backfiring can also occur when the engine is running too rich or too lean, or when there is a problem with the ignition timing. Regular maintenance and proper usage can help prevent backfiring in lawn mowers.
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Опубликовано:

4 авг 2024

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Комментарии : 222

@delynnaddams8774 Год назад

Finally, someone shares a succinct symptoms with fixes diagnosis. I did this today and fixed my propane gen. The exhaust valve was clamped down. My gen is working great now. Thank you so much.

@TheBry_Guy Год назад

good info. thanks! I believe my issue was a broken plastic cam wheel, but at least I was on the right track. The wife hit something and it started sputtering and backfiring. checked the keyway, was fine, cleaned the carb, was fine. replaced the carb. still nogo. gave it to a friend and bought a new mower, THEN started watching these vids :) told him to try a cam, but he's been sitting on it for a year now and I'm curious!

@goldienakamoto7894 2 месяца назад

"and ill let u kno why your wrong" I like this dude

@RepairGang 2 месяца назад

😂😂😂😂😂😂 thanks for watching

@NathanandMelissa Год назад

Super simplified great video of explaining misfires and the cause. Great job!

@RepairGang Год назад

Thank you

@thetwogardens6048 11 месяцев назад

Thankyou for this info. I will get to work on my lawnmower. High 5 from Australia !

@user-tu9ee5qe9e 8 месяцев назад

this was the best how to video ever thank you

@andrewjackson670 11 месяцев назад

I'm new to small engines like this. I figured that was the problem,but thanks for clearing that up for me.

@andrewjackson670 11 месяцев назад

I did check the shear pin first.

@JD-526 Год назад

I just had the same problem with the back fires on my Onan p218. Found out it was the intake manifold not tightened to spec, which is 20 foot pounds. Runs smoothly now.

@HMC777 7 месяцев назад

I have that problem today. 18h on a tree cutting lift, anyway it was parked a while and got water in the tank and it smells bad. Tries to start,starts but backfires. Tomorrow I'll be taking the covers off and be checking just this. Thanks and God bless you

@RepairGang 7 месяцев назад

You too friend

@garyamaral6276 2 месяца назад

Love it, I learn better with visual writing or drawing. Saw one vid of a guy explaining the 4 points of intake, compression..... and didn't get it and ge was going to fast. Now I get it.

@tomjohnson7398 2 месяца назад

Thanks for the clear, simple explanation!

@haydendavis2652 Год назад

Great video! A video I'd like to see is identifying engine sounds ,rod knock, valve tick,exhaust leak any other possible noises that are tell tale of certain things. I Service quite a few mowers that the motors don't sound the best.

@RepairGang Год назад

Good idea 💡 I will think about how to make that video

@THEMOWERMEDIC1 Год назад

Perfect explanation

@jimc3891 Год назад

Good job explaining.

@Turningwrenches85 Год назад

An awesome explanation of misfire/backfire , congratulations over 1m views

@RepairGang Год назад

Thank you 👍😊

@Turningwrenches85 Год назад

@@RepairGang your welcome 😁

@detrimundo 10 месяцев назад

most excellent information... I was about to throw my mower away... got it running in less than 30 minutes... thank you.

@RepairGang 10 месяцев назад

That's super awesome 😎 I'm glad you got it running

@jeffreysmith7663 10 месяцев назад

Having that problem good information will try tks.

@robertmailhos8159 Год назад

Great job on the cause of the mis fire on the small engines

@RepairGang Год назад

Thank you 👍

@robertmailhos8159 Год назад

@@RepairGang you are welcome young man 👍😎

@balibigb Год назад

Hi, great video btw really appreciate it. So mine starts and works just fine but backfires after i turn it off , usually a few seconds after i switch it off

@warriorsf911 10 месяцев назад

Thanks for posting this very informative video. I’m still having backfires and no start after adjusting valves, changing flywheel key, carburetor. Also I see air blowing out of intake when cranking. Shouldn’t intake only suck air and exhaust only expel air? Briggs and Stratton 20hp engine. Thanks!

@nickfazzio5277 2 месяца назад

Great explanation my man

@user-ge8or4os4e 2 месяца назад

Congratulations on your million views I haven't got into detail yet but I picked up a 2013 Craftsman professional PGT 9000 twin cylinder it starts now that I replaced the ignition switch that was all corroded but while I don't about every minute it'll pop through the intake and then if I go to come off idle it pops really bad so I went and bought two plugs today I haven't put them in I'll get them in tomorrow and then I'll go after the valve timing unless you can think of anything else I'm also buying fuel hose because I was not getting fuel I had to spray it but once I put the ignition and I didn't spray it at all and it ran but still popped through the intake

@michaellogue2254 3 месяца назад

Excellent teaching! Thank you.

@RepairGang 2 месяца назад

thank you

@bobw.991 Год назад

Thanks for the info. I set my valves, and it's better. But it still popped when I shut it down. It's a briggs 7 hp. Its running a bit ruff so i cleaned the carb, but maybe not good enough? But it's better. Do you think I should pull the carb off and check it again?

@js1451 Месяц назад

Great explanation!

@CALewis-xg1je Год назад

Great explanation for the folks just starting out. If I get a used atv that's hard to start I first check the carburetor pilot circuit and if thats good i go straight to checking valve clearence and timing of the cams. It sure makes life easier when someone takes the time to explain like this so Great video and thanks!

@RepairGang Год назад

Thank you for the kind words

@johnlomasney 6 месяцев назад

Thanks for the information 👍

@larry3099 11 месяцев назад

Great video! Thanks for making it!

@RepairGang 11 месяцев назад

Glad you liked it!

@ianmoore1478 10 месяцев назад

thank you helped me greatly cheers

@dj5752 6 месяцев назад

Really nice video. Thank you. Personally, I always check the flywheel key first. I find it easier/faster.

@RepairGang 6 месяцев назад

Yes but technically if flywheel is off it will make valves not time right

@dj5752 6 месяцев назад

Yes correct

@BADD400 Год назад

Great explanation of mis fire and sheared key way. Congratulations on the 1M videos will always watch your videos.

@RepairGang Год назад

Awesome, thank you!

@Mike-su8si 4 дня назад

I had already learned about what your explaining and misfiring and delt with those problems and fixed them one on a vehicle the others on mower engines an their valve's and closing air gaps

@geromieisom8167 5 месяцев назад

Thank you

@ronsauer1941 14 дней назад

Watched your video and thanks for it. I have backfires out the exhaust and intake both. My flywheel key is good, I took the head off, cleaned it and lapped the valves. My compression went from 60 to 82. Valves did not look bent at all. Lapping looked good on both valves and head. I’m missing something. Wondering about just replacing the head and valves. This is a 420 cc champion engine.

@Justme001.. 5 дней назад

Thank you for the video!

@FinCityFL 8 месяцев назад

Thank you for your details instructions! Here's what's going on with my Vanguard 23hp. I started it it revs high and slows down and pops through the exhaust. If I increase the throttle and let off it will increase rpms and stay high and slowly return. I pulled the new plugs and one side is black and the other is completely clean. Both sides have spark. I have pulled the carb and cleaned it prior because it was starting unless I put gas directly in the carb. The fuel inlet was clogged and the tubes in the carb. One side is loading up with fuel it seems. Any ideas?

@user-zk3yx9kd8q 11 месяцев назад

I enjoyed your great video. thank you If the pop is due to the valve not fully closing, what PSI should the piston pressure be below? For my Briggs & Stratton V-Twin 18hp horizontal shaft engine I was having pops in cylinders 1 and 2. Cylinder 1 is 150 psi and Cylinder 2 is 120 psi. What should the piston pressure in a normal engine be in psi?

@cube234 10 месяцев назад

150 is very good 120 is ok

@valentasd8217 9 месяцев назад

Hi, thanks for video. But i have a question. So in my case misfiring from carb. After my repair then i tried to fix a head. I polished valves, and fix a gaps between crankshafts and valves, engine compresion now is like in new engine 12bar. Valves timeing is corect to.. So my question is or its posible that valvs are leaking and i have good compresion? Thans.

@RicardoSantos-ir8rh 4 месяца назад

Excelente

@johnwyman6126 7 дней назад

Very good information here thank you. I think you may have one thing a little mixed up though. If the key on the flywheel is even a little bit sheared, it does not have any effect on the valve train timing, but on the Ignition timing. That key keeps the flywheel, along with the associated magnets, on the outer edge of the flywheel rigid as to the crankshaft. If those magnets get a little ahead, or a little behind, then they will go past the coil at the wrong time causing the ignition timing to be off. This normally happens when there is a shock to the drive system such as a lawnmower blade hitting a log or a rock or something, the key shearing in order to protect the crankshaft from getting bent, or twisted. The valve timing is located by the timing gears on the camshaft and the crankshaft deep inside the small engines. Although very rare, I have seen where the gear pressed onto the crankshaft gets a little rotated and throws off the valve timing. Other than that, I think the rest of the information is sound, thank you.

@CR-zc8xo 29 дней назад

Thank you!

@michaelharris978 6 месяцев назад

Thanks!!!

@phototec 2 месяца назад

great vodeo.... However, my Craftsman riding lawn mower with Kohler engine back fires when you turn it off, what would cau it to back fire after turning off the key? Thanks

@tonywall8991 4 месяца назад

Been fighting with this issue now for weeks on a quad bike. Spins over, won't start, but backfires through the carburettor. I did a leak down test, but couldn't hear anything through the carb or exhaust. Did a wet test and it improved slightly. So I figured the rings are bad, but still should have enough compression to start. I cleaned the carburettor thoroughly with no improvement, so I bought a new carburettor, still no improvement. The only thing I can think of left to try is do a valve job on it. Would like to hear your thoughts on this one, because I could not find a valve leak when I did the leak down test.

@RobfromArkansas Год назад

thank you for great info, my problem is on my Hustler Honda 18 hp mower when I shut off engine it backfires, even when I idle down most of the time. Could the fuel shut off solenoid be doing this? keep up the awesome videos

@RepairGang Год назад

Yes fuel shut off solenoid

@danielhafstad300 Месяц назад

Ok i have a briggs and stratton on a jd z425. I just replaced the carburetor because it was spitting oil out in the gas. Now it has a intermittent but loud backfire through the carburetor. While trying wrap my head around the valve condition, I was turning the engine by hand and discovered a "hard" spot just as the intake valve on one cylinder is starting to open. I can run the mower at full throttle with it just occasionally backfiring. Is my intake valve sticking? Or is it bent? The hard spot is very consistent when turning by hand but the misfire is more irrattic.

@stevemccord8233 3 месяца назад

My BadBoy 19 hp kohler engine back fires terrible when trying to start. I checked flywheel, also removed it, then put it back. Checked valves and all was good. Even removed the head and valves look great. Was going to reorder gaskets and put it back together to try it again. Don’t have a good feeling about that. WHAT ELSE COULD IT BE? Please respond. Thanks. Good video.

@Supernatural4us 11 месяцев назад

Great Video! My brandnew inverter generator missfires only when I turn it off, really loud, like a gunshot. Otherwise it is running fine. Not sure what to do.

@RepairGang 10 месяцев назад

It's a shut off

@RentFree24_7 Год назад

Keep in mind, a bad spark plug gap will cause this exact same issue. If the gap got pushed down, this will be the same issue. Start with checking for proper gap.

@RepairGang Год назад

Gap don't matter on small engines

@RentFree24_7 Год назад

@Repair Gang if you dont have a gap, it aint going to run worth a damn. I've picked up many alleyway mowers with squished gaps that just needed a little spacing, and they ran 80% better. It's definitely something that should be checked. It matters.

@johnnyandjeannele1477 10 месяцев назад

@@RentFree24_7 thank you for this, I just had this problem and the first thing that came to my mind is the spark plug. Mine might be bad as it has been 5 years. So i can check the gap or just get a new one.

@ke4uyp 9 месяцев назад

@@RepairGangI have a brand new gravely Pro Turn 500 Mach 1 with a Kawasaki FX 921 engine. The engine has less than 4 run hours on it and it is misfiring both on startup and shut down. Is it still the valves? I know I need to take it to the dealer because it's under warranty but I'm just curious what you may think it is.

@HMC777 7 месяцев назад

It's usually the first thing changed and I recommend you always change the sparkplugs, especially after bad gas, using starting fluid to test and backfiring, running to lean etc..

@Dhinchable 6 месяцев назад

Thanks

@RepairGang 6 месяцев назад

No problem

@Jake-st5mm Год назад

Briggs 190cc starts great. Once warm and upon restart it gives me one loud pop out the exhaust? Thoughts?

@RepairGang Год назад

A little bit of gas is going into the muffler

@Sidicas 2 месяца назад

What about if you are turning off the engine by shutting the fuel supply valve and while it is spinning down it misfires/backfires from time to time? Any reason/need to fix that or just ignore it? I shut off the fuel supply to make sure the carb is empty before I put the engine back into storage for 6+ months.

@jasonbowman7190 Год назад

Would the flywheel 🔑 fix help with surging issues 🤔. I just opened up the valve casing and everything seems to move back and forth when pressed. I guess I can turn the blade to see if it moves smoothly. Could it also be the new fuel filter 🤔. The lawnmower started surging about 20 minutes into mowing and then 5 minutes later stopped working altogether. I replaced the filter thinking that was the issue, but now I may try running the mower without it just to see.

@RepairGang Год назад

Flywheel could help surging would be carburetor

@jimnesbitt9596 Год назад

John Deere xs75 back fires through carb some. Will only start about idle and then I have be careful not to smother it. After slowly increasing throttle it will run fine and mow. However it’s very hard to get it started. And again it will only barely start at idle after several attempts . Flywheel key is good, carb is clean, spark plug is firing and valves look like they’re functioning ok. However I had a problem a few years ago with a stuck open intake valve that I fixed with barb cleaner and elbow grease 😬. Can you suggest a fix .

@RepairGang Год назад

Anytime you have a backfire it's the valves they need to be adjusted

@Cesar13M Месяц назад

I had a generator misfiring and after a minute died because the exhaust filter was clogged . I remove the filter and the generator worked perfect .

@DFiantFigure 4 месяца назад

I got this mini bike a whether the mixture was lean or rich I still get backfire/misfire. I choked it to see if too much air was the case and it stopped was when choke was on. I didn’t do it for long either. Just enough to see if it would pop an itch didn’t. I think I am getting too much airflow from my carb. Also could be the valves and I think you’re right. The explosion sounds like it’s coming out the exhaust pipe so I think my exhaust valve might be stuck shut or open one of the two. Ugh 😑 help me brother.

@brianhoyer2232 8 месяцев назад

Great video BUT........My mini bike engine was backfiring through the exhaust so I followed your instructions and removed the valve cover and checked to see if the valves were going up and down and they were. Then I removed the flywheel and the alignment key appeared to be fine. I figured I would just buy another engine and call it good. Then I read another thread and the problem was like mine also. "Three pulls and backfire out the exhaust." Their solution after after many different attempts ended up being the spark plug. So I replaced the plug in my engine, and to my surprise it started up and runs perfect now. So I would agree to it being valves most of the time but not 100%.

@RepairGang 8 месяцев назад

I feel that glad you got it running

@brianhoyer2232 8 месяцев назад

If it wasn’t for your video I would have trashed the motor. Thanks for posting.

@kenstirling5348 3 месяца назад

Air/fuel ratio could also cause a backfire. Basically incomplete combustion or no combustion occurs. If it’s incomplete combustion then the fuel may still be burning when the exhaust valve opens. In essence the timing is off but it’s off because the fuel is taking longer to burn than it should. That’s why you can make an engine running lean/rich run better by adjusting the timing. You’re adjusting the timing to work in conjunction with the slow combustion.

@headspace8338 Месяц назад

My rider backfired on the first start up of the season and blew a hole in the muffler. Will additives for winter storage cause this? Never had any issues previously.

@RepairGang Месяц назад

A valve probably got stuck open or shut

@brianfuerst9491 23 дня назад

Really good explanation, very helpful, good insight, makes sense. This might be an exception: I would think that if the timing is off or too advanced, meaning it prefires before the intake valve closes, (if that is even possible with today's smaller engines), a misfire occurs? (Comments are appreciated.)

@brianfuerst9491 23 дня назад

Congratulations on the 1M mark!

@RepairGang 17 дней назад

Thank you

@RepairGang 17 дней назад

Off timing still means valves

@marcmartinovic5366 2 месяца назад

Checking flywheel key is easier then valves that would be my first step.. If you having valve issue then its only one thing to do. Take the cylinder head off, remove valves, inspect valve seats, clean everything up and lapp the valves if you have bent valve it will show you immidiately on the seat and the valve. Then don't try to straighten the valve buy new valves and lapp it in for good valve seatting area.

@4569badboy 5 месяцев назад

Ok, so I did everything you said in your backfire video. Pulled the head, no problem there, including no valve guide migration. Checked the shaft key, its ok. New carburetor, backfires thru the carb, old carb did the same thing. What next? Pull the engine and check the cam and crank timing marks? I'm at a lost for this problem.

@RepairGang 5 месяцев назад

Yeah over head cam sucks it it was valves it would be intake valve

@horacio2562 Месяц назад

Trying to get an old 10 year old troy-bilt back kicking cleaned the carb, replaced the hoses, and adjusted the valves. It runs but as soon as you throttle it dies. I believe i need to change the old spark plug its blackened and should be changed i believe

@shannon5231 11 месяцев назад

Question: How exactly does the flywheel control the valves? From my understanding of how this works, the flywheel does control timing but only of the spark, and not of the valves. I'm sure this could still cause backfire issues if the fuel is being ignited at the wrong time but that would be because of a spark timing issue and not a valve timing issue right?

@RepairGang 11 месяцев назад

If the key is shared, it spends the crankshaft at the wrong time

@Swegen7 10 месяцев назад

I believe you're correct. The cam controls when the valves open in relation to the position of the piston. The key controls when the spark occurs in relation to the position of the valves and the piston.

@simonneat7866 2 дня назад

Hi there from over the pond!! I am baffled, I have rebuilt a Briggs and Stratton 450 series mower. I got it started, it ran smoothly for a couple of minutes so I shut it down. When I tried starting it again. No luck. Now it is dead with it backfiring through carb. Cleaned out carb, checked the valve position and movements (lapped and reseated to be sure) checked spark, magneto and air gap all good. Checked key on flywheel, that’s fine but still nothing 😢 Any ideas or areas to check? Thanks Simon

@EJBermudez Месяц назад

Maybe I am 1,000,001. Great video. Just picked up a TB360 that pops when you try to start it. Also drive cable is broke. Hoping it is an easy fix.

@JohnAdams-hq7eq Год назад

19.5 B&S. Blowback through the carb. Will not start. Valves set, new head gasket, valves lapped, valves move freely. Appears to be overlap of exhaust closing and intake opening. I know the compression release is bad. Would cam lobe wear cause this

@RepairGang Год назад

Yes

@honkeytonkjohnnygumbo1137 3 месяца назад

Question. What if it starts right up runs fine for a minute and then starts backfiring intermittently. Sometimes it stalls out but will start right back up. The push mower runs but keeps backfiring. Thanks!

@RepairGang 3 месяца назад

adjust the valves

@SamalexSamukono Месяц назад

How about valve clearance samalex from zambia

@lisachandler8210 Год назад

If you have a smaller battery than what is recommended in your riding mower, will this cause popping/backfiring?

@RepairGang Год назад

The battery is only there to start it

@bryanmccallum4614 Месяц назад

Can the back fire be caused by a bad coil ?

@Bottldiggerofnz Месяц назад

Mine was backfiring then it now it’s none stop flaming out the exhaust and it’s so loud I’m pretty sure it blew the valve to bits because there’s something rattling inside the valve cover?

@user-kr1jk9vt5i 11 месяцев назад

I been trying but I can't fix the Pop sound when I try to pull start the. Bike

@garybuice2500 10 дней назад

I have a Kohler 21 horsepower and it won't stay running unless you keep the choke on and it backfires out the exhaust and it gets hot real quick what could cause that

@smurra3 Год назад

@RepairGang I have a Craftsman LT2000 One day it wouldn't start period. Acting like no spark. Bought new coil/armature got it to run rough and lots of smoke. Messed with carb sprayed it out ran great again.. Went back out to mow a week later and it's running rough again.. Any Ideas ?? TIA

@RepairGang Год назад

Smoke means over fill bad rings or needs a valve adjustment

@smurra3 Год назад

Overfill? Does that mean it could be a leaking Carburetor ? @@RepairGang

@neelsharma2688 10 месяцев назад

@smurra3 I'm guessing overfill could mean you've overfilled the engine with oil so you're burning the extra, thus the smoke. It could also just be that the engine is running "too rich" (too much fuel in your air-fuel mixture you're burning), as that would cause it to run rough along with black smoke. If that's not it, you should check the head gasket as a bad gasket would let oil into the combustion chamber and let white smoke out of the exhaust.

@user-ge8or4os4e 2 месяца назад

The same Craftsman professional PGT 9000 one spark plugged wet one dry

@brucer1220 29 дней назад

I have one, it only pops after a down throttle done quickly?

@Blue1Sapphire 9 месяцев назад

I have a briggs and stratten mower that has been sitting idle for 2 yrs. I needed a 2nd lawnmower and decided to get it working again. There was no spark previously. I replaced the ignition coil and there was plenty of spark, but it was backfiring bad, so I took the motor out, removed the valves and ground them to seat well. The cam was also checked and all worked well. Timing was good as were all the gears. Compression is good as well. The carby primer pump wouldnt work and found the main jet was clogged so replaced it with a new one and then primer pump worked well. Plenty of gas going into the carby. So put it all back together and it still backfires and wont start. Checked the spark and all good. Plenty of gas in the carby and opened the throttle, but it will not start and wants to backfire. Got me stumped on this one. Any suggestions. Good video by the way.

@RepairGang 9 месяцев назад

I would check blade bal. if not adjust the valves something is open or closed when its not supposed to be

@Blue1Sapphire 9 месяцев назад

@@RepairGangThanks. . . I believe it is timing. . . So will go back and check again.

@koqgames Месяц назад

So is that good or bad

@erveyrodriguez9316 3 дня назад

I have a bobcat miller welder and it’s a little small pops when running on high idle and I have fire coming out the exhaust pipe. Help 😅

@RepairGang 3 дня назад

That might mean the carb is flooding

@daledorsett9791 4 месяца назад

I get blowback out intake but no flame. Ignition fires, gas available. Spray into intake and it sputters back out.

@RepairGang 4 месяца назад

100% you have to adjust the valves

@user-kb4wk1mx8k 8 месяцев назад

Timing key sher or partaial sher

@pspatil2302 5 месяцев назад

Very well explained

@RepairGang 5 месяцев назад

Thanks for liking

@stevedavidson9055 7 месяцев назад

I JUST REPAIRED MY NEW DUROMAX 4000. IT'S NEW BUT 300 PLUS HOURS.DID THE VALVES AND IT STARTS ON FIRST PULL.WAS POPPING OUT THE CARB.

@RepairGang 7 месяцев назад

Good job 👏👏 I love when people fix it themselves

@noah-vg3vr 2 месяца назад

Hey Man ❤God 🙌 Bless you.Thank Bro ;That Really works 💪 you just saved me 550$bucks man thanks again 😊

@RepairGang 2 месяца назад

Goddam someone was about to rip you off

@noah-vg3vr 2 месяца назад

No That just how much a new one cost lol.😅

@Dezza71 Год назад

fuel mix not working not getting any air and was blockage , unblock it and run like new motor

@EdWeibe 3 месяца назад

mine was running fine then started to run rough them backfire and quit. I was running it pretty hard at the time . I get 80 compression. old briggs on a lawn vacuum. She is popping from the exhaust with starter fluid about every third pull.

@RepairGang 3 месяца назад

dang did you fix it

@donsizemore8746 Год назад

What about a mower that pops while running? Just constant popping out of the exhaust.

@RepairGang Год назад

Valve

@maurigonzalez5147 7 месяцев назад

Constant popping is not the valves, popping is usually caused by the engine, starving for fuel, and running to lean. Try cleaning the carburetor, you may have a partially plugged main jet.

@AmyTabor-xc4nd Год назад

My brand new honda.pressure qashwr shots flames out when you turn it off it also backfires while in use

@RepairGang Год назад

Valves need to be adjusted

@markward38 Год назад

Hi , My ancient 2 stroke mower backfires badly when I shut the mower down . Mower starts easy though.

@RepairGang Год назад

Ancient probably key word 😂

@markward38 3 месяца назад

@@RepairGangdo you know how I can fix it it scares the dog and the wife,

@RepairGang 3 месяца назад

@@markward38 adjust those valves pretty simple

@protechfitness891 11 месяцев назад

hello to all! need help on my motorcycle, it run great the 1st 5-10 minutes ridding. and then backfire and loose of power. dose not shut down but every time I throttle backfire popping. Kawasaki KM100 what i have done is replaced spark plug. carbonator and premium gas all the time. thank you!!!

@RepairGang 10 месяцев назад

Check fuel adjustments to carburetor and that should fix it

@protechfitness891 10 месяцев назад

Thank you!!! I'll give it try this afternoon @@RepairGang

@michaelmilligan7291 3 месяца назад

The engine I worked on today was brand new back firering threw carb only at cold start once was warm up it would stop either timing or valve sticking alil

@RepairGang 3 месяца назад

check intake valve

@michaelmilligan7291 3 месяца назад

@@RepairGang yea my manager ant the best with engines. that's what I told him it was

@AmyTabor-xc4nd Год назад

Iy also dorsnt seem to want to spend the driveway wheels

@mikesautomaintenance5780 5 месяцев назад

15.5 single cylinder ohv briggs new head gasket valves set push rods good valves not bent and clean timing key in place but cranck no start not even a back fire has great spark but its blowing compression out the intake iam so confused 🤔 please help iam not really a small engine guy

@RepairGang 5 месяцев назад

Been 100% the valves need adjusting or one of them could be stuck. What I recommend is trying to adjust those valves even if you just got to do 10,000s with a Coke can

@mikesautomaintenance5780 5 месяцев назад

@@RepairGang thanks for the reply book says 3to5 on intake and 5to7 on exhaust I've tried to set the both on the tighter side and on the looser side and still no charge been fighting this thing all damn day even pulled the head back off to confirm valves are seated and they are and that open and close as they should iam about to burn it to the ground 😂

@alankennedy5759 3 месяца назад

I have an old John Deere 260. She won't start. I replaced the spark plug, the fuel filter and charged the battery. First try of the spring and I had a backfire so loud my ears are ringing! Help??

@Rein_Ciarfella 4 месяца назад

Excellent explanation for the reasons for this condition and potential solutions! Thanks so much! Suggestion - install some soft wall and ceiling coverings in this room to make your audio quality much better. The hard, flat walls are what’s causing the negative sound quality.

@losmoore3358 8 месяцев назад

Is this problem worth fixing, meaning price ? It be nice to actually show and fix these problems. I like to learn.

@RepairGang 8 месяцев назад

Yes it's worth fixing i charge about 100 for a valve adjustment

@Gr8teWyteThang 21 день назад

Bro I have a riding mower you can use for a demonstration!!!! I can't get it going 😮

@RepairGang 17 дней назад

You in Arizona 😂😂

@rayman7959 11 месяцев назад

What if it backfires on the exhaust when go for high speed to low speed only.

@rayman7959 11 месяцев назад

When you go from high to low speed.

@RepairGang 11 месяцев назад

That's a fuel solenoid issue or a air issue

@rayman7959 11 месяцев назад

@@RepairGang thanks m8

@kurtfischback8453 Год назад

Bought a used mower, runs great but when I turn it off it almost always backfires after the engine is almost completely shut down…and I smell gas. I’m assuming bad valves? 17h Kohler.

@RepairGang Год назад

For that case it's either bad valves or it could be a fuel solenoid issue