Check the chain tension over a full revolution of the auger. I bent my auger by backing into a frozen snow bank. The chain would go from too tight to very loose. I tightened it some more thinking it was loose.
I caught it preseason and replaced the chain. I straightened the auger with some...
Is your throttle foot being jarred because of bumpy terrain? I have that problem mowing a poorly plowed field. I have to use cruise control at a slow pace to maintain an even speed, otherwise I'm surging in a feedback that gets so bad I have to stop.
The engine will stay running with the seat flipped forward when running 540 RPM PTO. If you are running 960 PTO RPM the seat has to be occupied, flipping the seat does not work. I have an over ride switch I use when running 960 PTO on the wood chipper. There are two switches on the seat. There...
THIS IS WHAT I USE WITH MY 3PT SNOWBLOWER:
https://www.tractorsupply.com/tsc/product/countyline-swivel-handle-hitch-pin-4-1-4-in-usable-pin-length-s071041cts
or
https://www.tractorsupply.com/tsc/product/countyline-red-head-hitch-pin-grade-5-4-1-4-in-usable-pin-length