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  1. P

    Overheat Mystery

    I have an OMC 4cyl in a 1987 Starcraft Islander that runs about 200 degrees. Impeller is good. Replaced temp sensor and temp gauge. The OEM thermostat is rated at 170 degrees. Tested that in hot water with thermometer and it does start to open around that temp and is completely open about 180...
  2. P

    Fuel bubbles crank end seal

    Having trouble keeping 50 up merc running. Acting like fuel pump but friend replaced diaphragm last year. ( he did not do check valves though) can keep running by squeezing primer bulb. Starts to stall after a couple minutes and then squeeze primer again. I noticed fuel and air bubbles coming...
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