Enter your model number at the Sears Parts Direct web site. A manual
may be available for download. With luck, it may have more details on
A Craftsman model number consists of two or three digits, a decimal
point, and several more digits. The first two or three digits
determines the "source". Look for your engine's source code at
<http://sears.pammar.net/maker.html to find who made it. With that information, you may be able to find service information from the
As I understand it, when the piston is at top-dead-center, one valve has
closed and the other is about to open. There is a gap ("valve lash")
between a push rod and the valve lifter mechanism, that can be adjusted
by loosening a lock nut. You should set the gap with the engine cold.
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