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  1. M

    1976 Merc500 losing power when warm

    I have a 1976 Merc 500 - one previous owner (my father), well winterised between seasons and in fairly good shape.<br /><br />I've used it three times this season (pushing a 15foot runabout) and it runs really well - we're up on the plane in a hurry and it feels nice, then the power drops, and...
  2. M

    Unknown tach wiring

    I have an old tach with my 1976 Merc 500. It was working last time it was used in the summer of 2003, but we didn't keep track of the correct wiring moving it from my dad's boat to my boat - it was removed from the old boat for us by a service center.<br /><br />The two wires from the bulb area...
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