Diesel Fuel Pump Priming Tool is suitable for priming fluids on diesel engines. It is most commonly used on outboard or inboard boat engines. Ideal for introducing fuel into the fuel pump after replacement of the fuel filter. Product Features Works on the vacuum principle One-way only function Connects to any length of hose Inludes rubber hose 2x1m Technical Data Overall Length: 150 mm Input Connectors: 8 mm