So my dad bought a new 24 in. Craftsman snow blower about 4 months ago. He put gas in the machine at that time. Probably just regular gas with no additives. He has started the machine monthly. That's the only use it's had due to lack of snow. The problem is that now it won't run. If I use starting fluid it will start as soon as I stop squirting it dies. I'd rather not take the carb off if I don't have too. Any ideas?