13-1. FUEL SYSTEM/CARBURETOR/ FUEL PUMP/ FUEL TANK GRAND DINK 125/150 Diaphragm O-ring Install the O-ring onto the air-cut-off valve body securely. · Install the O-ring with the flat face toward the valve body side. Install the diaphragm, spring, and cover. Cover Spring Install and tighten the two screws attaching the air cut-off valve cover. Connect the hose. Screws Auto Bystarter Screws AUTO BYSTARTER INSTALLATION Install the auto bystarter and set plate. Install and tighten the two screws. · Insert the auto bystarter into the carburetor body until it bottoms and position the set plate into the upper groove in the bystarter. · Install the set plate with its round face facing down. Set Plate 13-14