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

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Engine revs up and down, improves when choking half way

JDeere kohler command 23 revs back and forth when on high throttle especially when hot thanks LB

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Sounds like to me that your governor may need to be adjusted. Too much detail to explain here as to how to do it.

A dealers technician can fix that in 5 minutes if he knows what he's doing.

Posted on Oct 28, 2009

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Posted on Jan 02, 2017

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I have an older craftsman snow blower 10 hp. It starts ok with full choke, runs ok half choke, backfires with no choke-run position.


It's too lean; not enough fuel mixed with the air. Look for the main mixture screw--it should be a large screw with a spring under it on the carburetor. Run the engine until it's warm.

With the engine running, turn the screw outward (lefty-loosey) about 1/8 turn slowly and see if it improves. Slowly turn the screw back and forth until it runs best with the choke completely off. Then set it 1/8 turn richer (turn screw outward 1/8 turn) than the best position.

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