Question about Kohler CH25 PA-CH730-0040 Command Gasoline Engine

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Have older bobcat zero turn mower, 22 hp kohler command engine, started burning old and filing the spark plug on right side if you are standing behin the engine, had it repaired, 2 new coils, head gasket, and rings. Runs ok but when, i start it up it up it smokes a little bit for a few seconds, it backfires on and off but when i engage the pto it doesent backfire or at least i cant hear it. How do i get rid of the backfire in the engine

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6ya6ya
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Posted on Jan 02, 2017

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nova2nv
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SOURCE: John Deer L110 with Kohler 17.5hp backfires wont start

This model is known for shearing the flywheel key.

Posted on Nov 14, 2009

Testimonial: "Just as you said - flywheel key had sheard, an easy fix thanks very much."

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SOURCE: I have a Kohler Command 17.5 model# CV491S. It

IS YOUR MACHINE A J DEERE?

Posted on Oct 17, 2009

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SOURCE: kohler 19 hp runs then backfires and stalls when heated up

Check that the keyway for the flywheel to the crankshaft hasn't sheared. This is a common problem that throws timing very far off causing backfire and no-starts.

Posted on Nov 02, 2009

  • 2 Answers

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!

Posted on Jan 14, 2010

  • 905 Answers

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.

Posted on Jun 12, 2010

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