I have a 1985 Renken boat with a GM 350 block and an OMC stern drive. Here's my problem. I just installed 2 new batteries this morning. When I turn the key, the starter spins like crazy. I don't hear anything "kicking out", like I read people describing the bendex. All I get is the spinning sound. Is this as simple as pulling off the starter and putting on a new one. Or could it be more complex, like bad wiring, solenoid, etc? Is there somewhere specific I can test with the multimeter to rule out electrical problems? Any ideas?