Mercarb marine carburetor pump assembly comes with ethanol resistant pump cup to withstand todays fuel with alcohol / ethanol. Complete accelerator pump plunger assembly with heavy duty alcohol resistant pump cup. MADE IN THE USA.
Fits older mercarb carburetors with straight accelerator plunger stem.
Mercarb Marine carburetors that use this accelerator pump assembly:
1389-8488A2, 1389-8489A5, 1389-8490A2, 1389-9350A2, 3304-9353A2
Not sure where to find your carburetor number? Click here to read artical on Carburetor Number Identification.
Note: Although the pump cup is not colored the "normal" blue, it is made from an ethanol resistant viton material that is compatable with today's new fuels.
Cup Diameter: 21/32"
Stem Diameter: .234"