12. CARBURETOR SUPER 9 50 AUTO BYSTARTER INSTALLATION Auto Bystarter Install the auto bystarter into the carburetor body until it bottoms.. Install the set plate and then tighten the two screws. Set Plate Screws FLOAT CHAMBER Screws Remove the two float chamber screws and the float chamber. O-ring Remove the screw and O-ring. Remove the float pin, float and float valve. Float Pin Float 12-7