Dave N.

So, sorry, I forgot to come back and post. The problem wound up being the starter clutch. Got it replaced and running fine. This is the 2nd starter clutch since I've owned it. Only 60 miles on it. Probably going to sell it. Thank you ALL for your guidance!!!

So, from your comments above, this is what I have found so far: The gear marked #3 in the diagram should turn freely in one direction, but not in the other direction. If it won't turn in either direction, you've found the problem. There's a one way clutch or bearing that will allow the gear #3 to spin freely in one direction, but the opposite direction is what starts the engine. The starter gear stays meshed with gear #3. - So, I cannot see the gear #3 as the hole is only a little bigger than my thumb and that's where the gear on the starter motor goes in. The gear labelled #7 (Idler Gear) will turn in both directions if I put a screwdriver through the hole and turn it. Does the starter spin at all? It may be spinning in the wrong direction. Ask me how I know 😡. Yes, with the starter motor removed from the gear box, the gear moves in both directions by hand, and when energized by the keyswitch, moves what appears to be clockwise when looking into the end of it. So, how do you know if it is spinning the wrong direction? If you can get something into the hole that houses the gear #3 besides your finger, such as a screwdriver, try to spin that gear using that. If you still can't get the gear to spin in either direction, you'll most likely have to replace the one way bearing. The gear labelled #7 (Idler Gear) will turn in both directions if I put a screwdriver through the hole and turn it. Thoughts on the issue? How big of job is it to take things apart to see/replace the gears and/or the clutch? Should I take it in somewhere to be fixed? (That is, if I can find anyone to work on it!!) 😠 Again, I truly thank you for your guidance here. Much appreciated.

So, I pulled the starter off and went through the motion of starting the Buck. The gear coming out of the starter turns and seems fine. Stuck my finger through the hole and tried to move the gear that the starter meshes to, but it did not seem to turn. Put the starter back in and everything is the same. Is this an electrical driven clutch or mechanical? How hard is it to take apart? Would like to fix myself, but maybe should take it to a shop???? (That is, if I can find a shop to work on it). Thanks again for all of your comments.

Thank all of you for your comments. Hoping to dig into it today. So, was this fixed by replacing the starter motor? Thanks again!

2020 Massimo Buck 400 - Won't start. Can hear the starter spinning, but motor never turns. Relay? Starter? Worked fine one day and not the next. Thanks for any help you can provide.

Buck 400 at first would not turn off. Sounded like starter was still running. Finally got it to shut off. Turned back on and ran about 50 yards and it died. Now when I turn the key, absolutely nothing happens. Battery hot.