Hey, I have a Strikemaster mag 2000 2 Horse Power auger. My Dad got it used somewhere, and I would guess its roughly 8-10 years old. It is a Tecumseh T C 1 1 and calls for a 24:1 ratio (says this on the power head). Sometimes it doesn't run the greatest at this ratio so I have tried 30:1 and 40:1. what would you guys try? thanks in advance