I aquired an old Crafstmen snowblower and put a new engine on it and it runs great. It is a single stage snow blower. I don't have model number but can get it if needed. Both the auger and the drive wheels are linked to the motor with a chain versus a belt. I like the old school approach but the machine does not blow snow very well. One minute it will seem to blow ok and then it seems to just puke up the snow to the top of the shoot and thats as good as it gets. What could be the cause of this? Is the auger supposed to be a certain distance away from the metal housing that it spins in. The gap between auger and the metal housing is about 1/2". Maybe thats too much and doesn't keep snow i n auger? Suggestions please.