Model #917275520 Craftsman lawn, tractor

Question and Answers

Q:

Why does my Craftsman 917275520 backfire at low throttle?

A:

A backfire at low throttle only is usually caused by incomplete ignition of the fuel.

I would replace both spark plugs. If you still have the backfiring, you should get a technician to diagnose the problem. You could have a problem in the ignition module as well.

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Jimmy K -
Sears Technician
June 23, 2009