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  1. J

    Carbon build up question?

    I have had a mechanic suggest that my 90 mariner ,that has a loss of power on the top end, my have a carbon issue. Has anyone ever heard of carbon building up on the exhaust port and getting hot when you run the motor. When it gets hot it detinates and causes a backfire pop in the engine and...
  2. J

    90 mariner help!!!!!!

    Hopefully someone my be able to help!!! I am at my whits end with this one. I purchased the engine under the impression that it only needed a switch box, although it had been sitting for two years. I have replaced the switch box, rebuilt the carbs, replaced the fuel pump, and checked the...
  3. J

    80 Mariner Help!!!!!!

    Just purchased a 1995 90 Mariner that has been sitting for about two years. I have pulled the carbs and cleaned as per Selco manual. I have put a new switchbox on the engine also. I have good spark at all spark plugs, I have good compression on all three cylinders, and the carbs are clean. I am...
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