MOTOR RUNS GOOD ON HOSE BUT NOT IN WATER , 1983 JOHNSON 70HP HAVE REBUILT CARBS AND REPLACED POWER PACK MODULE . HAVE NOTICED THAT THE PLASTIC SURROUNDING THE MIDDLE COIL IS MELTING. I AM GOING TO RUN IT ON HOSE TONIGHT AND UNPLUG THAT CYLINDER AND SEE IF IT MAKES A DIFFERANCE, ALSO I HAVE CHECKED THE FUEL PUMP DIAFRAM FOR ANY TEARS OR PIN HOLES AND FOUND NONE . ANY HELP WOULD BE GREATLY APPRECIATED.