I HAVE A BOAT WITH A 305 SMALL BLOCK MOTOR,MERCRUSIER WHICH WAS REPLACED A FEW YEARS AGO. EVER SINCE THE NEW MOTOR IT CONTUNIES TO EAT UP POINTS. WHEN WE REPLACE THE POINTS IT RUNS FINE FOR ABOUT 20 MINUTES AND IT BEGINS TO START MISSING AND BACKFIRING.ANY IDEA ON WHAT MIGHT BE CAUSING THIS TO...
