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  1. R

    rpm question

    I just bought a 150 hp mercury power tilt outboard and the guy that I bought it from said something about not going over 5500 rpm for too long but I read in one of your other post about a 150 outboard that you should run it over 5500 rpm to keep the cylinders clead or something like that can you...
  2. R

    how much oil should I add????

    I just bought a 1978 mercury power tilt outboard 150 hp motor and I have no idea what the oil to gas ratio should be. Can you help please? The guy that I got it from had only run it once and he said that it was 16-1 but I want to make sure before I screw something up. thanks
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