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What's the valve clearance on a 21hp briggs and stratton mower. Engine number 331877-0869-G5 for model 247.288853

IN .003-.005 and EX .005-.007

See page 10 in Operators Manual.

ILENGINE said:

IN .003-.005 and EX .005-.007

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I take it that's decimal

Yes it in SAE thousandths of an inch.

Thanks

StarTech said:

Yes it in SAE thousandths of an inch.

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Guessing I can get one for a small engine at any part store

Ljh said:

Guessing I can get one for a small engine at any part store

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Available at auto parts stores. Just a standard feeler gauge set.

ILENGINE said:

Available at auto parts stores. Just a standard feeler gauge set.

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I have a small cheap one it start at .010

If you haven't used a set before be sure someone coaches you the first time on what is about the right feel. Basically you are feeling for light drag on the gauge that is the correct thickness. Some engines are done at TDC and some a specified piston drop past TDC.

Get a reasonable set. Like $7 thru Amazon.

Yes, & be sure to be reading a SAE scale on the thickness of the the feelers.. & NOT the mm (millimeters)..

Ljh said:

I have a small cheap one it start at .010

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That's 10 thousandths, too large already, need a set to starts around .002" & up......

Ljh said:

I have a small cheap one it start at .010

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Too high!

Yes too thick..