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I need to know the over head vave setting for the intake and exhaust on a 17.5hp Briggs & Stratton vertical shaft, single stroke lawn mower.

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Hi pauly46 here

set piston to tdc compression stroke then run it down the bore a 1/4 inch

set the tappetts to inlet the bottom valve ( alloy push rod ) to a tightish 0.004" and set the
ex valve the top one ( steel push rod ) to 0.005"

setting at 1/4 pst tdc eliminates decompressor from upsetting valve clearance seting


cheers pauly46

Posted on Mar 27, 2011

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