Walbro FPF-1-1 Impulse Fuel Pump Assembly

The Walbro FPF-1-1 is a genuine OEM impulse fuel pump assembly designed for small engines commonly found in lawn mowers, chainsaws, generators, and other outdoor power equipment. This pulse-type fuel pump uses engine crankcase pressure differentials to pump fuel efficiently from the tank to the carburetor, ensuring reliable performance and consistent fuel delivery.

Key Features:

• New sonic welded design for improved durability and leak resistance
• Operates using engine pulse pressure through a flexible diaphragm system
• Genuine Walbro OEM quality and reliability
• Direct replacement for older 4-screw model FPC-1-1
• Compatible with both 2-stroke and 4-stroke small engines
• Includes internal check valves for proper fuel flow direction

This impulse pump assembly features a modern sonic welded construction that eliminates the need for multiple screws, providing better sealing and reduced maintenance compared to older models. The pump works by utilizing pressure pulses from the engine crankcase (2-stroke) or intake manifold (4-stroke) to actuate an internal diaphragm, which draws fuel from the tank and delivers it to the carburetor at the proper pressure. Ideal for applications where gravity feed is insufficient or where the fuel tank is mounted below the carburetor level.