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  1. 3

    150 mercury black max

    Will crank and idle fine and will rev up with manually turning the butterfly's but when put into gear to rev up the motor Boggs out. Any help is appreciated. Thanks 1985 mercury black max 150
  2. 3

    Need help with how to tell 150 mercury black max.

    I have a 150 mercury black max. The serial plate is a beat up and can't read the numbers. The freeze plug on top is (667378. Could any one lead me in the right directions. On what year and model it is. I have problems with engine and can't seem to figure out what's going on. Idles fine and will...
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