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  1. J

    1978 mercury 200 20hp missing

    i have a 1978 mercury 200 20hp that has some issues. When i run the boat at wide open it seems to surge from 3/4 throttle back to full throttle back and forth untill i let out of the throttle. its more like a constant rock front to back while riding in the boat. This motor only does this at wide...
  2. J

    1978 Merc 200/20hp troubles

    i am having trouble with my 1978 mercury model 200 20hp. Serial range 4709593 and up. I aquired this motor from an old fire department that rarely ever used it. the guy said maybe 30-50 hours on it. paint is still on the prop and fin. It has been sitting in a garage for 20 plus years. Once i got...
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