Manual syphon fuel pump 6mm / 8mm

A manual fuel primer bulb (hand siphon pump) used to start fuel flow and transfer fuel through low-pressure lines. Squeezing the rubber bulb generates suction that draws fuel through the hose; releasing it allows the body to return to its original shape and continue priming. An integrated one-way (check) valve prevents backflow, and an embossed arrow on the body marks the flow direction.

The bulb body is made of fuel- and oil-resistant rubber, with metal (aluminium-alloy) hose barbs at both ends. The stepped, ribbed barbs grip standard fuel hose firmly; using metal hose clamps is recommended for a fully leak-tight connection.

• Barb diameter: 6 mm or 8 mm (variant selectable)
• Body: fuel- and oil-resistant rubber
• Hose barbs: metal (aluminium alloy), stepped/ribbed
• Valve: integrated one-way check valve
• Flow direction: marked by arrow on the body
• Compatible fluids: petrol, diesel, heating oil, kerosene

• Bleeding (priming) the fuel system after filter replacement or after the tank runs dry
• Transferring fuel from a jerry can or drum into a tank
• Priming outboard and inboard marine engines
• Tractors, lawn mowers, chainsaws, generators and gensets
• Carburettor and low-pressure fuel systems on motorcycles and cars

Not intended for corrosive liquids, saline water, or high-pressure fuel systems (e.g. common-rail diesel injection). Choose the variant (6 mm or 8 mm) according to the inner diameter of your existing fuel hose.