can anyone help me? snowblower probs

Hi, this is WAY off topic lol, but since most of you are good with these engines and know what your talking about, i figured you might be able to help me, since my snowblower is also a 2 cycle engine....i think? lol. Its a small orange one with rubber propellers the pick up the snow rather than blades like the big ones have.

Anyway...It woulldnt start in the begginning of the winter, so I took it to a lawnmower shop to get it fixed and just got it back. I started it up today and it started up pretty easy, but it is idles at full speed, so when i pull the lever that says "engage propellar" it doesnt even do anything since the propellars already going. Thats not a problem though, I can deal with that, i would turn the idle down but the gu8ys probobly turned it all the way up for a reason? But, my problem is that itll start and run fine, but after i turn it off, i cant start it again for another 3 or 4 hours, and nmow i want to go blow off my deck, i just did the driveway, but i cant because i cant get it started...i dont get it. Can anyone help me? Thanks alot, Ross.