Ok, here's more info. Its an Enya 35, the only way it starts is to squirt fuel into the carb. It then starts no problems. However, the revs slowly fluctuate on a steady throttle. Question, I've adjusted the high rpm mixture screw. What is the adjuster screw next to this main mixture screw, and what is the other adjuster screw on the top face of the carby? Low and mid range? Which is which?