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    Merc 850 (85hp)How to check/clear cooling system of items plugging system.

    Hi Guys. After reading some of the other posts about mercury cooling/water pump problems I think I have bits and pieces, debris in the cooling system of newly acquired 850 model 85hp 1975 Mercury. The guy I bought it from started it for me on muffs and it seemed to run ok except one carb was...
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    85hp merc 850 not peeing from telltale, getting exhaust smoke or steam from tell

    Hi Guys. I just posted a reply to a post by whipple about same situation as I have with a newly acquired 1975 (year Id by serial number)mercury 850 85hp. Had the water pump impeller replaced and the carbs rebuilt by a local shop. It ran with a stream from the telltale from the shop to my dock...
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