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Sears Craftsman model 917.270.711 (10 years old). This is a followup question. The mower had been starting roughly with white smoke. It got progressively worse, to the point where the mower stalled with large amounts of white smoke (seemed to happen after engaging blades, coincidence?). Gas definitely had entered the oil crankcase. I inspected the float and needle valve- they look OK.. Other than the carburetor, are there other things I should be looking at? Thanks.

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There is a possibility that the head gasket is blown.

Until you are certain the issue of fuel being in the oil is resolved, internal engine damage could be happening. Inlet needle/seat leakage must be check with a leak detector or pressure guauge.

Posted on Nov 16, 2009

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