Toro 624 Snowblower
I have a Toro 624 snowblower that's been acting up. Last winter I had no problem starting it but when I engaged the auger, it would stall. I was able to keep it running by keepng the choke on. I finally got it to the repair shop a few weeks ago and he cleaned the carb., replaced part of the fuel hose, installed a new fuel shut-off valve and changed the oil. When I picked up the machine at the shop, he started it and it ran fine with the choke off.
Today I was cleaning up from the latest storm and noticed it sputtering, like a faint backfire, and suddenly it just stalled. I tried starting it but it wouldn't start. I pulled the plug and checked for a spark but I didn't see one. That could be due to the bright sunlight and snow glare. I let it sit for about 30 minutes while I, yes it's true, I used a shovel to move the snow. After my workout, I was able to start it but I had to fool with the choke to keep it running. After a few minutes it suddenly stalled again.
I'd appreciate it if anyone could provide some clues as to what's causing this machine to stall because shoveling snow is over rated.