Manual fuel primer pump, suitable for rapid priming of the fuel line in outboard and small gasoline engines. It incorporates double check valves for smooth flow and prevention of fuel backflow. It is compatible with unleaded/leaded gasoline and ethanol blends (e.g., E10). It is installed between the tank and the engine, following the flow arrow on the body.

Features:

• Fast fuel system priming – ideal after changing filters/hoses
• Double check valve: one-way flow, no “backflow”
• Fuel and alcohol resistant rubber casing
• Compatible with common fittings/fuel hoses
• Blister packaging for shelf protection

Codes & dimensions:

• 10.654 → Small 5/16"
• 10.655 → Large 5/16"
• 10.656 → Large 3/8"

Installation tip: Connect the primer pump with the arrow pointing toward the engine and press until it “hardens”. Periodically check hoses/fittings for wear.