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fairview_101

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  • Troubleshooting Twin 1995 150HP Mercury Black Max Motors?

    I have already rebuilt the fuel pumps and have had considerable performance improvement. Both motors are exhibiting the same problems to varying degrees at different times. The problems I have now are intermittent hard starting, cold or hot, consistent excessive smoke at start-up and at idle, and stalling when shifting into gear. High speed performance is good. 45+mph (gps) at 5000rpm. It is not the matter of not being able to perform the necessary work but rather after rebuilding the fuel pumps I have no idea what the next step(s) should be. I expect there will be several hopefully minor fixes/adjustments to be made but I have no idea where I should start and what path I should be on.

    Compression is in the mid range for the year model with less +/- 2.5% difference across the cylinders

    Thanks in advance

    5 AnswersBoats & Boating1 decade ago