so i was trying to start the engine about a week ago (after letting it sit for 2-3 weeks), and i let it crank for a few seconds. i pressed the gas pedal to prime the carb a bit, and tried to crank again, and all the sudden the starter motor was just spinning without engaging the flywheel. no grinding sounds, or sounds of anything breaking. it was cranking one second and not the next.
after looking through some posts, i thought it could be flywheel, seized engine, starter solenoid, battery, or main fuse. but i checked the flywheel teeth, they look okay no noticeable damage, and i can turn the engine by hand so it doesnt appear seized. i swapped the starter (motor and solenoid), got the battery tested, and changed the 70 A battery fuse, but i'm in the same spot. the tachometer also does bounce a little when i try starting.
i also tested the old starter while i had it out and the starter drive is popping out...which made me think it would not be solenoid/motor.
there is a whirring noise from the starter, so i know its spinning, but definitely not engaging and cranking the engine. thanks in advance!!