139 mower how to adjust how much adjustment
The exhaust valve clearance can be slightly larger, generally a difference of 0.02 mm each better. The valve did not imagine so difficult to tune, the right face.
Cam, the mutual position between the piston; second position is very easy to determine the gap in the case of the smaller the better,
This is actually no absolute answer, but I tell you a skill and principle, the first position must be right, refers to the crankshaft
