Starter verses Alternator
Attempting to winterize the boat and she wouldn't start. It only started twice after some hesitation. Turn the key for the Yanmar diesel and voltage meter drops from 10 volts to 0 and the engine does not turn over. The starter was hot to touch. The starter selinoid began to smoke.
We charged the batteries and purchased a new No.1 starting battery. We are not sure why the voltage meter is registering 10 volts when it should be 12? A few tests and sounds we are aware of indicate the starter selinoid or starter have failed and need replacement. But how can we be certain it is not the alternator? Any thoughts?