New spark plugs fixed my surging. My switch is still acting up so I'll probably just try a new switch. The switch internal components are spot less but it continues to self engage itself. I may try tightening up the internal switch spring and see what happens.Someone else on here had problems with the deck lift switch and I think Sergeant had to have his PTO clutch replaced under warranty with <10hrs.
I kept having surging issues until I switched to non-ethanol gas then that cleared up.