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  1. J

    2.5 motor vs 3.0 mercury with alpha 1

    pulled out a bad 3.0 and put in a good 2.5 motor.the 2.5 id plate is missing so i have no idea what year it is.[1]are there other numbers on block that would tell me what year it is?[2]is the carb on the 3.0[1988] to big for the 2.5 motor to handle?the linkage is all different.the 3.0 has...
  2. J

    water in oil

    bought a 1988 regal boat with 3.0 merc-cruiser drive unit.had it running a couple of times with water hose but not in water yet.guages all reading good.was going to take it for a ride and notice water in the oil.not just a little water,it was very milky.i've changed and rebuilt a few motors but...
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