John Deere AM109212 Pulse Vacuum Fuel Pump Assembly

This pulse vacuum fuel pump assembly replaces John Deere OEM part numbers AM109212, AM136612, and LG808656. It operates using crankcase vacuum pulses to actuate an internal diaphragm, delivering low-pressure fuel to the carburetor without electrical connections. The pump features a polymer housing with barbed inlet and outlet ports for 1/4 inch fuel line. Designed for gasoline engines in John Deere LA105, LA115, LA120, LA125, LA130, LA135, LA140, LA145, LA150, LA155, LA165, LA175, L105, L110, L120, D105, D110, X140, X145, and Z425 lawn tractors. Direct bolt-on mounting configuration matches original equipment specifications. Cross-references Briggs & Stratton pump numbers 808492, 808656, 491922, 691034, and 692313.