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OMC 225hp ob compression
An OMC mechanic recently came up with these psi figures on a pair of 1997
Johnson 225's, attached to the Blackfin 27 I'm looking at. Pre-FICHT as I have learned from this NG. Roughly 500 hrs on them. The test was done on a cold engine. Port 110,110,109,109,105,105. Star 115,115,105,105,109,103. Are these figures OK? What would they be if the engine were brand new and warm? I know on an inboard the variance is more important than the numbers, to a point. Is the 10% rule in effect? |
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