I HAVE A PROBLEM KEEPING MY BOAT RUNNING. I HAVE A 1988 3.7 165HP 4CYL MERCRUISER THAT DOESN'T SEEM TO IDLE VERY WELL AND WHEN YOU PUT IT IN THE WATER IT RUNS GREAT FOR ABOUT 1/2 HOUR AND THEN STARTS TO SPUTTER AND LOSE POWER UNTIL IT FINALLY CUTS OFF. IF I LET IT SIT FOR A WHILE IT WILL RUN...
