John Deere L110 won’t turn over

I have a John Deere tractor mower that will not currently turn over. Thought I recently fixed the tractor when there was absolutely nothing’s happening when I return the key in the ignition. It turned out to be a blown fuse that I replaced. That appeared to fix the tractor completely. Along the way, I changed the battery, solenoid, and spark plug. Tractor was working fine when I was hauling some firewood, but as soon as I engaged the blades for the. Grass cutting, the machine turned right off. Currently, when I turn the key, all that happens is it sounds like the machine is trying to turn over, but cannot. Thank you very much and answer any help you might be able to give!