Compression

Caregiver5354

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Can anyone tell me what the compression is suppose to be on a B&S single cylinder 21 HP Model 931877 540cc Intek with XRD?
 

ILENGINE

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Briggs doesn't list compression readings because of the compression release doesn't allow for an accurate reading. Leakdown testing is the preferred and more accurate test for engine health.
 

Tinkerer200

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You have your model number wrong, it will be 33----. Compression will probably read 90 PSI or so but not really be accurate as said above.

Walt Conner
 
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