Lawn Tractor Help

[Swimmer]

I have an Ingersoll tractor with 987 hours on it. Runs like a charm most of the time. I have done all the repairs in the past.
This morning I was backing up and didn't realize one of the three bags fell off and wrapped itself around the middle blade. It shut itself down before I realized what happened. I fairly easily unwrapped the bag. The blade did not hit the metal frame the bag hangs from. Now the tractor wont start. Any ideas. It has spark. It has a new starter. However the new battery was junk and I have had to jump it several times since I bought it in August. It has gas. It should have started right back up. It has one of those clutches on the front of the engine that when you hit the switch it engages the belt drive and turns the three blades. Is there a fuse there that I might have popped?