Product details:

Overview This is the HPI 101310 Slide Carb w/Pull Start G3.0 HPI101310 from HPI. Low Speed Needle: Set flush with carb body, let engine idle for 30 seconds, then accelerate to 3/4 throttle. If there is a lot of white smoke and slow acceleration the mixture is too rich. If car accelerates quickly and sputters, the mixture is too lean. Turn needle in 1/8 turn increments to adjust. Do not turn past 2 turns from flush.