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  1. R

    Specs for 1989 OMC 5.0L

    Where can I find out what the factory specs for 89 OMC cobra 5.0L engine. (optimum engine rpm)
  2. R

    Proper Engine R.P.M. for Cobra 5.0

    I have a 1989 Forester 1800 Diva GT with A OMC Cobra 5.0. I'm Currently Running a 14 1/2 x 19 Aluminum prop and turning about 4600 RPM. I was wondering if I would gain any top speed by going to a stainless steel 14 1/2 x 19 prop. Any Thoughts or suggestions would be greatly appreciated.
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