Kohler CH25 PA-CH730-0040 Command Gasoline Engine Logo
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Anonymous Posted on Jun 16, 2014

What would be the cause of a Kohler 25hp twin, backfiring through carb from one cylinder

Engine ran fine when parked, started the problem the following day when started, does not smoke and no prior notice of a problem

1 Answer

Renee F

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  • Kohler Expert 573 Answers
  • Posted on Mar 02, 2015
Renee F
Kohler Expert
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Joined: Oct 15, 2013
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Bad plug, ignition wire, valve clearance, or valve damage, vacuum leak at manifold. Timing cam off / damaged

5 Related Answers

Anonymous

  • 2 Answers
  • Posted on Jan 14, 2010

SOURCE: kohler k582 runs poorly at operating speed.

ALWAYS CHECK THE POINTS!!! 20 years operating this engine and you'd think I would know better. The points were severely pitted. Spec said .020 but actual is .013. The cold weather had me suspecting a carb problem. DOH!

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Anonymous

  • 677 Answers
  • Posted on Feb 04, 2010

SOURCE: Kohler CH20S losing power, blowing black smoke and oil

Sounds like engine is flodding. Have carb float checked, make sure it is at the correct height

Sheldon Dedek

  • 912 Answers
  • Posted on Jun 12, 2010

SOURCE: Kohler 17.5 command. will not start

The woodruff / flywheel key is likely partially sheared. Pull off the air housing, remove the starting clutch, to get to where you can see the flywheel key. I bet you will find that the key has distorted. Easily replaced once flywheel is pulled. Make sure to use the correct key when replacing it.

Anonymous

  • 10319 Answers
  • Posted on Aug 28, 2010

SOURCE: i have a kohler cv14s engine is will not start it

readjust the valves to eliminate the backfire so it will start

Anonymous

  • 1 Answer
  • Posted on Mar 11, 2011

SOURCE: kohler command 18 backfires when warmed up

kohler pro 18 on craftsman riding mower. Idles fine but lacks power at high speed. i installed a new carb. does not seem like it is not opening up full throttle and will back fire if i accelerate the throttle too fast.

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Ron, Try new plug/s first, sounds like the carburetor has dirt in it, you will probably have to remove carb. and clean/rebuild. From manual, other causes from your trouble shooting guide ,
? Faulty carburetor. ? Faulty cylinder head gasket. ? Faulty or misadjusted choke or throttle controls. ? Fuel pump malfunction-vacuum hose clogged or leaking. ? Intake system leak. ? Loose wires or connections that intermittently ground ignition kill circuit. ? Quality of fuel (dirt, water, stale, mixture). ? Restricted fuel tank cap vent. Check the attached links,instruction and guides, Good luck
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What would be the cause of a Kohler 25hp twin, backfiring through carb from one cylinder

now the kohler v-twin does have a bit of a problem with camshafts in this size range , your gonna need to remove valve cover on head side that you suspect is bad , verify that valves move in order (one at a time) as you turn over by hand with spark plugs removed (both sides)
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Dennis in Chicago
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