John Deere Fuel Pump LG808656 M145667 Pulse Vacuum Replacement
Aftermarket replacement pulse / vacuum-operated fuel pump for compatible small petrol engines and outdoor power equipment. This style of pump uses pressure pulses from the engine crankcase or intake system to operate an internal diaphragm and move fuel from the tank to the carburettor.
Components Identified From the Product Photos
- 1 x complete round diaphragm fuel pump assembly
- Black moulded pump housing
- 3 x hose connections for fuel inlet, fuel outlet and pulse/vacuum line
- 2 x integrated mounting ears with bolt holes
- Four perimeter case screws securing the pump body
- Central breather / filter insert visible in the pump cover
Supplied as pictured. Fuel hose, hose clips, mounting bolts and fuel filter are not shown and are not advertised as included.
Fitment
For selected John Deere outdoor power equipment using the genuine John Deere LG808656 fuel-transfer pump family. Confirm the machine model in the John Deere parts catalogue before purchase.
Fitment note: John Deere lists LG808656 as an original fuel transfer pump and identifies M145667 with LG808656 as the current part reference.
OE / Manufacturer Cross-References
- LG808656 – genuine John Deere fuel transfer pump reference
- M145667 – John Deere reference which now points to LG808656
- 597338 / 808656 – Briggs & Stratton pump-family comparison references
The Moto Mania pump is an unbranded aftermarket replacement. The numbers above are genuine/OE comparison references for identifying the compatible pump family; they are not claimed as the manufacturer MPN of the supplied pump. Google Shopping MPN is therefore left blank.
How This Pump Works
Briggs & Stratton describes this type as a pulse-operated fuel pump. Engine vacuum/pressure pulses move the internal diaphragm and check valves, drawing fuel from the tank and delivering it to the carburettor when the fuel tank is positioned too low for reliable gravity feed.
Common Symptoms of a Faulty Fuel Pump
- Engine starts but stops as the carburettor bowl empties
- Poor fuel delivery under load
- Long cranking or difficult starting after the machine has been standing
- Visible cracking, leakage or damage to the pump body
- No fuel movement despite clear fuel lines and a clean filter
Important Compatibility Checks
- Compare all three hose-port positions with the existing pump.
- Check the spacing and orientation of the two mounting ears.
- Confirm the engine uses a pulse/vacuum-operated pump rather than an electric pump.
- Match the original OEM/reference number wherever possible.
- Check fuel-hose internal diameter before installation.
- Route the pulse line exactly as originally fitted and keep all hoses clear of hot or moving components.
Many pulse pumps look very similar externally but can have different hose orientation, flow characteristics and mounting arrangements. Always compare the existing part and engine parts diagram before ordering.
Installation Advice
Clamp or shut off the fuel supply before removing the old pump. Transfer each hose one at a time so the inlet, outlet and pulse connections are not mixed up. After installation, run the engine and carefully check all hose joints and the pump body for fuel leaks.
Delivery & Returns
- Fast UK dispatch
- Free UK delivery where shown on the product page
- 30-day returns subject to the Moto Mania returns policy