Hadn't had this happen before, have a lb7 that the stater solenoid is engaging but starter won't go ahead and turn over, until about the 4th try of the key cycle. Voltage is good down at the starter and solenoid/exciter wire, had starter bench tested and it tested good. Even went ahead and tried a new starter and it does the same thing. Ring gear looks okay on the flywheel, any other ideas?