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    200 blackmax low compression after winter storage

    I recently pulled my boat out of winter storage, it was not starting and after checking all cylinders were reporting low compression @50. Motor is a 1978 mercury blackmax 200hp. Curious what could cause this as it was running fine all last summer when it was stored, now low compression in all...
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    1978 200hp sputters from weep hole at idle

    At first start up my 1978 merc 200hp does not expel any water from weep hole, when it gets warmed up it sputters a small amount out of hole, at full throttle has a nice steady stream. does this sound like it could be a bad or old poppet (relief) valve? It has a new impeller kit and two new...
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    1978 merc 2000, poppet valve?

    Curious if my 1978 mercury 2000 has a relief (poppet) valve on it? I havent been able to find a replacement part for it but the block looks like it has one. I found a kit for V6 mercurys but didnt show one for a 78, anybody have any insight on this?
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    21p, where to go from here?

    hi all, i have a 1990 baja 17.5 ski boat with wake tower thats running a slightly modified (edelbrock man, carb ....) 4.3l yamaha. my question is that it has a stainless prop, the only markings on it shows its a 21p (diameter should be 14- 14 1/2). its hauls ***** out of the hole but im maxed...
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