Quote:
Originally Posted by Mike Banks
I suspect that the starter motor is spinning but the Bendix drive remains disengaged. It slides along a thread against a spring, and the thread needs to be lubricated. If it has not been lubricated for some time, this may be the cause.
You will need to remove the starter motor to do it, and while you have it out, you might as well check the motor brushes as well and replace them if worn.
If your batteries are two years old, they may be alright, but there is a chance that they are faulty and that is why they are simply not spinning the starter motor at sufficient speed to operate the Bendix drive. Terminal voltage is not the same as terminal voltage under load.
I replaced mine every two years anyway. An engine that will not start in an emergency is a potential loser of your vessel, and perhaps your life and that of any others aboard at the time.
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What Mike Banks said. All the battery based responses are of value, but if uoure hearing whirring the solenoid is working, its the bendix
gear that’s not sliding along the shaft to engage the flywheel
gear. The starter removes with three bolts. Though tapping the housing may free it up, lubricant is definitely in order. Best would be some blaster or LPS1. The
head of the starter is most likely grit or grunge laden.
Two batteries, one older with lower voltage, one newer with higher-the new one will be pulled down to the lower voltage. Clean all connections, wire brush, and reassemble , apply dielectric grease as preventive coverage.