How do I adjust my carburetor on my 4HP Snapper Snow Blower. I just rebuilt my snapper snow blower carburetor after it hasn't been started for many years. I've got it started and I can't remember how to adjust the air and fuel mixture .........Also my pull rope is about to brake and I'd like to replace it....That's why I'd like a owners or a repair manual / information on how to do this..........Thank you George