Re: Starter motor won't disengage
The starter solenoid might have fused contacts, stuck together from arcing.
There also could be a problem with the ign switch or wiring harness which is putting power to the solenoid all the time.
The way to narrow this down is to disconnect the yellow control power wire from the small terminal on the solenoid.
If the starter motor still runs when you reconnect the battery, the solenoid is bad and should be replaced.
If the starter doesn't run, take the yellow wire and quickly touch the small terminal where the wire normally connects. If the solenoid activates even with the ign to "off", most likely the problem lies in the key switch.
But I'd bet it's the solenoid itself causing the problem. Sometimes you can make them 'unhang' by 'mechanically agitating' i.e. beating the Living Tar out of the solenoid with a plastic mallet or other suitable rapping tool, but most likely it's gonna do it again. Solenoids are fairly inexpensive and not too hard to replace. Just make sure the battery is disconnected before breaking any electrical connections!
Check the iBoats store,
www.boats.net,
www.crowleymarine.com, or
www.boatfix.com for replacement parts online.
HTH & let us know what you find.........ed