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  1. R

    new tach for my boat

    I bought a new tach for my boat I have a 1975 wellcraft V20 steplift with a 1975 115 Mercury 2 stroke O/B I'm not sure how the wires go. I have the harness from the old tach there are 3 wires bat, grnd and sender. I enclosed a pic of the new tach . the dial on the old Tach was set to alt but...
  2. R

    1975 merc OB 115hp lost reverse

    prop rotates in forward gear but does not rotate in reverse. the motor run fine in both gears any ideas what could cause this
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