8mm 5/16" Fuel Primer Bulb Fuel Pump Transfer Pump Hand Primer Bulb Outboard Cars Marine Boats for Transfer Liquids Gasoline Diesel Oil Size: 5/16" 8mm Input Connectors: 5/16" (8mm); connects to most lengths of hose. One-way function only. Constructed from high-quality rubber and aluminum, offering durability, oil resistance, and aging resistance. Commonly used as a hand pump in boats for supplying fuel to the outboard engine. A simple and effective tool for priming diesel engines on cars, motorcycles, and boats. Compatible with carburetor and low pressure fuel systems. Used to introduce fuel into the fuel pump after replacing the fuel filter. Suitable for transporting gasoline, diesel, oil, water, and similar fluids ???? Please confirm the model details with us before placing your order.