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  1. F

    water pump kit - where does this o-ring go?

    I have a single small o-ring in the water pump kit that is 7/16" od about 0.25 id. It is not for the vent or fill screws, I have id'd the gaskets in the kit for them already. Does it go to the flush screw at the water pump - shift shaft above the bushing seal - I'm not sure. When I tore my...
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    how to measure lower unit back lash

    I've got a '65 Merc 900 that I need to replace the seals and the bearings in the lower unit. I've got a great older Seloc manual that give me the specs, but doesn't say how to measure the backlash. Is this measured on the prop shaft or driveshaft - and at what distance from the center of the...
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    Water in lower from ear muffs -after oil change

    I checked the oil in my lower unit - it was milky to start with. I put in fresh oil, changed the fill/vent seals and ran it in my driveway for about 5 minutes with the ear muffs. Checked the oil again, and it was milky again. I would think this points my leak to the water pump seals, right...
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    new to the forum

    Hi all, I just picked up an older merc (90 hp) and I'm not sure what year it is (no serial number plate). I'd guess late 60's/early 70's vintage. I'm having a few issues that you guys may be able to help with. The starter bendix isn't engaging the flywheel all the time - I tried 3 in 1 oil...
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