Question about Craftsman 20 hp 42 in. Deck Yard Tractor

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Popping out exhaust, loss of power, wont run at full throttle.

Have replaced plugs,cleaned carb, replaced key, cleaned gas filter,replaced fuel, put in new valves,lifters and push rods. Checked for cracked heads, changed the oil. It has plenty of fire and compression.The valves seem to be open and closing correctly.I have not taken a hammer to it yet ! Almost to the point . The 20 hp kohler was running perfect and when I idled the throttle down and turned off the key it popped one time and when I started it up minutes later this is the problem it started giving me ?

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I had the same problem. If it is a 2 cylinder, remove the valve covers. On one side, the rocker arm had slipped off of the push rod. It was real loose. Put the rocker arm back on the push rod and tighten it down. I think this will do the trick.

Posted on Sep 01, 2009

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Check that key again.

Posted on Jun 16, 2009

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