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2000 Evinrude (Suzuki) 50 HP 4 stroke engine compression range

sledman1

New member
Looking at a 2000 50 HP Evinrude 4 stroke, fuel injected engine. Does anyone know what the compression should be for this motor? No history on this engine so I am trying to determine hours on this engine from the compression readings. All cylinders are reading within 2 PSI. I need to verify my gauge is giving accurate readings but I was measuring 130 PSI. I guess this is a Suzuki motor. Thanks for any help you can offer.

Don

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Compression should be around 180 and within 10% of one another, I am guessing you did the test with the throttle closed, try with full throttle
 
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