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    1969 Merc 500 50hp shift shaft help!

    I just replaced the water pump on a merc 500 I just bought from a private party. I was fortunate that the lower unit came off easily, however, it appears someone had tried fixing the pump before and had a rough go of it...one lock nut missing, one stud stripped and the gaskets were installed in...
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    1969 Merc 500 (50hp) Spark plugs and impeller

    I know this has been addressed countless times but I'm still not clear on what people are recommending for spark plugs for older Mercs.<br />I have a 1969 Merc 500 (50hp). The owner's manual lists a AC-V440FFK or Champion L78V. The previous owner installed NGK BUHW plugs which are actually a...
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