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2007-10-01 13:49:55
2007-10-01 13:49:55

remove plug, use a compresion gauge or put your finger over plug hole, crank engine, if your finger feels like it was being sucked in and then blowen out , its fine, bad compression will give you very little suction, or blow out, could be valves are leaking also,


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briggs doesn't offer compression ratings for their engines. I will usually pull it 3 to 5 times and look for 90 to 120. anything less is a problem and if it doesn't hold compression there is a problem

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B&S does not specify compression readings. Look for 120, give or take 20. More important than actual compression is the difference between the 2 cylinders.

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