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    1976 50ph 500 verses 1971 85ph 850 ???

    I have just finished the hull of my 1976 Magnum and have a Question that the Pros will have a lot more insight than I. I need to rebuild but which outboard do I go with, The original outboard on her is the 76 Merc 500 50 s#4361149 ran her around 31mph 5000 rpm. Number 4 lost 40 psi, she needs...
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    1976 50HP Mercury 500 4 Cylinder ?

    I have just finished refurbishing a 1976 Magnum. And got the outboard running good. It felt good and strong compression was 131 -127 when I started. She was hitting 31 mph (GPS) at 5200 rpm. (ok, I need prop work). When on the second trip out after warm up and a 1/4 mile no wake zone I slowly...
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