Went to get Grizzly 600 ready for fall/winter, hard starting because it sat for a while. Got it started and was letting it warm up, then it just killed, acted like no fuel. Since it had been sitting, I put carb cleaner into fuel hose from the tank side of carb, then some Seafoam in tank. Got it running, throttled it up, then it backfired and quit again. Assuming it was still "lean" problem, opened vent at bottom of carb bowl to make sure fuel was coming in, checked out OK. Got it started again.
While letting it warm up, had to wait several minutes on 1/2 choke, start to throttle up and s