Recent content by ATF

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    Compression ???

    I've got a 2001 150HP optimax. I just had it winterized and the dealer says the compression is 110 psi across the board.<br />It was 125psi last year which was the first year I owned it.<br /><br />Is this sort of drop in compression something I should be concerned about? The motor has had some...
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    Change impeller when?

    I'm thinking it would be a good time to change the impeller on my 2001 150 optimax.<br />It's never been done but I was wondering when I should have it done.<br />Is it best to do it before putting it away for winter storage or in the spring when I take it out.<br />Any thoughts?
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    understanding operating RPM questions

    Hello All,<br />I've got a 2000-150hp optimax that I bought last year which I run on a 20ft deep V aluminum walleye boat. I'm trying to understand operating RPM so I can dial in a prop.<br />I thought I had it figured out last year when I tried a 19p tempest plus prop. I got 5400rpm at wot and...
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    150 optimax possible wiring connector problem

    Hi All,<br />I'm new to the board and desperate for help. I live in a landlocked region where it seems knowledgeable Mercury mechanics are few and far between.<br />I have a 2000 150 optimax I bought new last year. Ever since I had it I have had a problem with the engine using the oil from the...
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