Fuel Screw Effects in 1/2 Turn Steps

Closed fuel screw – Red 1/2 turn – Green 1 turn – Blue 1 1/2 turns – Brown 2 turns – Pale Green 2 1/2 turns – Pink 3 turns – Purple With motor hot, turn fuel screw inwards until the rpm's drop, then turn outwards 1 to 1 1/2 turns.