Help! My 1993 Merc 5.7L starter failed to turn over - just fast clicks are heard from starter solenoid at starter. I tried to jump slave solenoid for starter but same thing - just fast clicks are heard. Batteries are charged showing 13.52 volts. So, I changed the 5 year old starter - but same thing - the new starter solenoid clicks rapidly and the engine does not turn over. Had batteries tested under load & they are OK - when jumping the slave solenoid, it clicks but does not engage the starter - you hear fast clicks at starter solenoid. All wires appear good so out came the sand paper to clean all terminals and polish up all wire ends. Still same symptoms. Last 10 or so starts - the starter engaged, but slowed momentarily, then spun quick starting engine. The last boat trip on way back, had to start with two batteries vs. one. That trip, at home, for rinse, it fired right up. Then this weekend - just clicks are heard - Any Ideas? Should I change the slave solenoid? Should I remove the new starter and bench test? :stumped & confused:
