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    1984 Mercury 115 inline 6 only firing on one cylinder

    Mercury 115 firing on just one cylinder. Compression good on all. What and where should I check next. Any suggestions on what may be wrong?
  2. C

    84 Mercury not running right

    I have a 84 Thunderbolt 115 that I am having a issue with. When the boat is out of water the motor runs great. Takes the gas and turns good rpm's. When in the water the motor idle's good up to about 1/4 throttle. After that it boggs down and will not run (except idle speed). I thought it...
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