Howdy, I have a 1990 Mercruiser 3.7 with alpha one drive. First launch of the season didn't go as planned. Turning the key only resulted in a click from slave solenoid and no crank. Battery is fully charged. Jumped slave solenoid and still just a click no crank. I removed plugs and turned over by hand, no liquid in cylinders, not seized. Removed starter and bench tested, everything seems to be operational. When I was originally attempting to start by key, the solenoid would click in neutral but not drive or reverse, which I took as the neutral safety switch working properly. I was about to order a new starter before deciding to pull out and bench test. I am not sure where to go from here. I am thinking I should reinstall starter and ensure all connections are clean and tight. maybe jump starter itself while installed?!??! What could cause it to no even attempt to crank?!?
