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In Reply to: Valve adjustment on 12hp Tecumseh posted by Paul on Saturday, January 12, 2002:
An OVM120 needs .002 clearance on the intake and
.004 on the exhaust. Remove the rocker arm cover
and the spark plug. Stick a pencil in the plug hole and turn the flywheel by hand when you are
at top dead center. Loosen the locknut enough
so the adjusting nut can turn freely and adjust
the clearance, use two wrenches to tighten the
lock not and put a drop of lock tite to make sure
it stays in adjustment, recheck it after you are done tightening the nuts. Let me know if I can help.
Fish