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Recent content by seanfawcett

  1. S

    10W40 Oil Used in Fuel mixture

    Hi: I just purchased a sailboat that came with a small inflatable dinghy and a 4 HP Johnson Seahorse outboard. (don't know the year). The motor seems rot run fine (smoked just a little) but after running a few minutes I looked at the oil bottle that was in the boat... It was 4 cycle 10W40...
  2. S

    Mariner 150 overheating?

    I have a 1993 Mercury Mariner 150 Magnum II which has always run really well. Last time I ran it, however (first outing of the season) the temperature gauge climbed to about 200 degrees in 5-10 minutes at 3000 rpm and the warning horn sounded. I shut the engine down and let it cool. I...
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