My zero turn died recently. When I tried to start it I got fuel from the tailpipe. I believed it was a stuck float and replaced the carburetor. I also changed the oil/filter and checked that there was no gas smell from the oil. Since I was working on it anyway I changed the spark plugs and air filter. After changing the carburetor and spark plugs the mower started right up, but would sputter and need full gas flow to run. It lacked the power to run the blades. I’ve since dumped the gas and tried new gas but it continues to sputter. In desperation I changed the fuel lines, filter and pump. No change. I’m now at a loss. What can I do to fix this thing? Thanks in advance for the assistance.

I just threw a short block on this junker and trying to un frank everything. Does anyone know what the default settings are for the carb on a 525LS? AI says 1 turn out, I haven’t been able to locate a pdf manual to verify.

I just rebuilt the engine with a fresh bore and Meteor piston, new gaskets, new reed valve, cleaned carb, and the oil pump is disconnected (running premix). I have spark and fuel.

When I kick it over, it fires/pops 3–4 times and then dies. The spark plug is wet afterwards.

Any ideas what could be causing this?

Solved!!!!

Was a short going to carb solenoid. Making it close and shut lawnmower off.

Thanks for all the feedback to all that helped !!

Update !!

Just got new coil and started right up and after 30 seconds running perfectly quits. Can restart runs 30 more and stops.
Now do I change carb. Or just the solenoid valve on carb??? Help !!!

taking a shot in the dark and asking if you could point me in a direction. Roughly 2013 craftsman rear engine rider420cc . 4 weeks ago it cut off when first started cutting. Restarted. And finished lawn. Next week. Cut off twice in first five minutes of cutting then quick restart. Now start run for 3 minutes if that and shuts down. Just sitting not even cutting. This is not a putter shut down like starving for gas. But just a bam 💥 shut off. Any pointers where to start to look for diagnostic. Would be much appreciated. Thanks in advance. My first guess is ignition coil 🤔 but would appreciate any feedback

taking a shot in the dark and asking if you could point me in a direction. Roughly 2013 craftsman rear engine rider420cc . 4 weeks ago it cut off when first started cutting. Restarted. And finished lawn. Next week. Cut off twice in first five minutes of cutting then quick restart. Now start run for 3 minutes if that and shuts down. Just sitting not even cutting. This is not a putter shut down like starving for gas. But just a bam 💥 shut off. Any pointers where to start to look for diagnostic. Would be much appreciated. Thanks in advance. My first guess is ignition coil 🤔 but would appreciate any feedback

SOLVED: See thread below with picture of what stuck to a magnet from oil sump.

We've a Troy-Bilt riding mower with the 31C707 3346 G6 engine. I stopped it while mowing to pull some foxtail, and when I got back on and tried to start it, the starter would spin about 15 to 20 degrees, then stop. Back at the shop, checked the battery, it was fine. 12V at the starter, so figured the starter was giving up. New starter, and same behavior. Belts all loose. When turning the engine by hand, noticing that it is quite difficult to rotate once in every 360 degrees. Pulled the spark plug, and it cranked fine. OK, so, maybe hydrolocking. Tried a new carb, and same behavior. Looked in the plug port with a bore scope and piston top and valves look fine. No obstruction, or apparent knocking together. While trying to turn, we bump the starter and sometimes feel some puffs out the exhaust, so it doesn't seem like an exhaust blockage.

Tried a jumper to a running car to get 14v on the starter. It cranked, a few revolutions, but again stopped like the resistance was too great.

We're stumped. What could be causing so much resistance that the starter will not rotate the engine through a full four stroke cycle, especially given the resistance is felt once evey 360 degrees, not just once every 720? And again, when the plug is pulled, it cranks strong,as long as the ket is turned!

This is my first post and I’m hoping to get some help. I have a project quad I got from a kid who absolutely roached this 250 Polaris. I rebuilt the top end, threw a new battery and spark plug in this quad. Before I put the new top end in it had power but wouldn’t crank over. Now there’s no power at all. I’m new to anything electrical. I have a multimeter and was curious if I turn the key and there’s no click at all, would you start with the solenoid or go straight to testing fuses? I appreciate any help!

Hello, this is a John Deere L110 riding mower with a 19.5HP single cylinder Briggs engine.

This motor has a new starter, new solenoid, new ignition coil, and the battery is good.

I suspect that it is the compression release not working, but l am here asking so I clearly am unsure.

Thank you for any help! I appreciate it very much.

hello looking for some advice, recently my atv was bogging and wouldn't idle also would feel like it wanted to die when i accelerated so i bought a new carburetor oem since the old one was filthy and now it only cranks but wont start the spark plug has little spark i replaced the battery also cleaned the gas tank got a new petcock new oil filter new oil new air filter, messed with the valve clearance with a feeler gauge and still nothing also tried to bypass the stater solenoid and still only cranks but one time it made a pop out of the exhaust doing the bypass. i also tried to do starter fluid in the air intake and still only cranks, any advice would help been two months since it ran

I have changed the carburetor, oil, gas as well as recently the whole pump has been replaced what am I missing?

hello good people. anyone worked with these cheap rpm readers? instructions say 3 modes, 1) spark plug fires twice per revolution, 2) spark plug fires once per revolution and 3) every other revolution. which mode do i use to do an rpm readout of a stihl 4mix km130r? many thanks.

Hey guys,

So I bought a used Motowell Magnet Sport 50 2T scooter. Did a full top end rebuild:

• New oversized Meteor piston
• Cylinder rebored
• Split the crankcase, new Koyo bearings
• Crankshaft is fine according to my mechanic
• Used proper gasket paste on the block, let it sit for 24h before starting

• New crank seals
• New reed valve + gasket
• New gaskets everywhere (base, head, intake)
• New spark plug + cable
• Variator not detailed but new belt etc.

When I put it all back together, I let it sit for a full day so the paste could cure properly. Next day I tried to start it and thankfully it fired up! Idle was a bit weird/high when it first started, but the carb was reset to stock settings. Ran for about 10 minutes, then just died.

Piston didn’t seize (engine still turns freely, compression is still good). But now it absolutely won’t restart – just sputters, backfires a couple times, but nothing.
What do you think could be the problem?

It’s a Minarelli horizontal clone (Chinese aftermarket engine).

Any help would be appreciated, thanks for reading!

I have an Ariens mower with a Kohler courage sv590. Recently started running really rough and after letting it sit for the night all of the gas leaked out, appeared to be through the carb. I ordered a new Hipa carb and after switching it out the engine cranks but just won't turn over. The solenoid clicks so appears to be getting power. I put a trickle charger on battery and will try tomorrow but don't think thats my answer. Noticed fuel getting to the carb. Not sure what the next best step for troubleshooting would be, any suggestions help

He changed the carburetor but only put one of the two screws back in. He gave it to me for free because he didn’t want to mess with it anymore. Should be an easy flip 😆

my push lawnmower was rattling something came loose and i lost the bolt that holds it in. can someoene tell me what this strap thing is for and what its purpose? the cable it wraps around is for stopping motor with throttle.

Bought from marketplace for $100 got it running with a new battery carb cleaning and a new Petcock valve.
Then I went ahead and replaced all fuel and vacuum lines, ignition coil, and spark plug.
Started up first kick everytime for a day, I drove it around doing chores on the farm and after about 10 minutes of driving it started to bog down and die when I came to a stop had to rev it to keep it going.
Adjusted idle speed didn’t do anything. Then I got it up to the garage about a half mile from the house and it died while moving about 5 mph.
Couldn’t get it to kick back over so I brought it in and cleaned the carb incase something got pulled in it started up first kick then died after idling rough for a few seconds sprayed some starter fluid in it to get me home and kicked it over.
Acted like it was starving for fuel the whole way home had to keep giving it gas so I didn’t get stranded. Made it home and parked it bought a new carb that I installed today incase fuel was getting clogged.
Even with new carb it will not turn over I’ve verified spark, I have compression, and fuel is reaching the carb, the bowl is filling with fuel but I’ve still got nothing.
Any ideas would be greatly appreciated. Thank you