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Compression test question


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First of all I would use a snap on comp tester because they give very accurate readings.Make sure gauge hose fitting is properly hand tightened so the rubber gasket makes a good seal. Also make sure your getting the engine up to operating temp and holding the throttle wide open while checking the compression. Keep kicking it over untill the needle stops moving on the gauge.....the readings on each cylinder shouldn't be more than a few psi difference from one another.

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