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  1. R

    Motor identification

    I,m looking a purchasing a used Johnson 90hp, 2-stroke motor. Its currently on a 1982 vintage boat. The model and serial numbers on the motor I.D. plate are faded away. There is a number stamped in the block however. The number is 168093 07DN. How can I find the age, model and serial number so I...
  2. R

    Old Merc 110 running on 1 cylinder

    I took a 1976 Merc 110 out of storage for 10 years, rebuilt the carb, put in new spark plugs and gas, checked compression, 118 and 120. It seems to run fine at 1/3 throttle or higher but on lower rpms only one cylinder fires. If I crank it up it runs nicely on both again. Any pointers for...
  3. R

    1989 Merc surging

    I have a 1989 Mercury 90 HP outboard that acts like its starving for fuel when running over 4000 rpm. If I sqeeze the fuel line primer bulb at these rpms it clears up for about a minute, then acts like its not getting enough fuel again. I have replace the fuel filter and all the fuel lines from...
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