Jumpy oil pressure - just rebuilt motor???
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Jumpy oil pressure - just rebuilt motor???
1986 350 mercruiser that was just 100% rebuilt by a local shop - new bearings/crank/rebuilt heads/etc.... I took the scarab out on the lake with a mechanical oil pressure gage and it is bouncing from 60psi (WOT) slowly to 55psi, then jumps down to 45-47psi and works back up to around 55psi... any ideas?? It has the stock windage tray and a new pump, and 6 qts in the pan/filter. Before I pull the motor again I am wondering if anyone has any ideas.... please help!
#7
My initial thought is that the pickup fell off the oil pump, but most of the marine engines I`ve torn down have a brace or bracket to prevent this. But .... rebuilder could have left this out or ... ?
My second thought is oil aeriation, as already mentioned.
My second thought is oil aeriation, as already mentioned.
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