Thank you sir, While I've had this issue on cars through the years I've never had it on a tractor so wasn't sure. I'm going to order a new starter and see. There something odd with the voltage and could easily be it. My amateur view of the teeth was they weren't that bad at their worst but again not sure. Most of the flywheel is like the second pic. Really appreciate the help. Please keep safe.
If you are having a voltage issue, you may not have a starter issue. I thought you had said you had good voltage at the starter.
Before ordering a starter, I would check every connection from the battery ground to the starter connections. It may also be worth the effort to take the battery somewhere and be load tested. It is possible that any loose/corroded connection or weak battery may be your issue and not the starter.
Sorry Coy for omitting info. The "voltage" issue i mentioned is on the starter post of the solenoid (which is relatively new). On the battery side it is almost 13V steady but on the starter side it is 12 =12.8 when whirling/grinding but when it engages the engine it drops to under 11. That's what I've been struggling to determine, is it something going on inside the starter or is it a mechanical issue involving the starter gear/ring gear. I've cleaned tightened all connection including the ground at the frame. Also used booster cables from a pickup with it running directly to the starter and the numbers don't change.
I apologize, I should have given more info in the first post.
I suppose it could be the solenoid but it wouldn't have 20 hours on it. And it was doing this before I changed it.
thanks California, I think I'll do that. A starter change is super simple compared to anything else. Appreciate the help. Keep safe.