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原帖由: Mike ,

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I have a 17.5 HP Model 31C707.

Valve Clearance – Intake .003 - .005 in.

Valve Clearance – Exhaust .005 - .007 in.

I prefer to not stick anything metallic down the spark plug hole. A disposable chopstick works fine and makes it easy to mark at TDC, then put a second mark 1/4 inch farther out.

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