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Compression for a 1985 OMC 120 VRO

6pax

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" I was wondering if anybody c

" I was wondering if anybody could tell me a good compression numbers for a 1985 Evinrude VRO 120? What is the variation limit between cylinders? I think OMC made low compression engines for a while, is this one if them. Any info is helpful, thank you. Also, should I test with the other 3 plugs in? Does it matter? "
 
Comp # 's should be 100 t

Comp # 's should be 100 to 110 psi.keeping other plugs in will not make any difference.
 
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