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Compatibility
This part will fit the following 21 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
White OutdoorWhite Outdoor SB-221 (31AS235-790) - White Outdoor Snow Boss 21" Snow Thrower (2007)Auger & Drive System
White OutdoorWhite Outdoor SB-221 (31AS235-790) - White Outdoor Snow Boss 21" Snow Thrower (2006)Drive Assembly
White OutdoorWhite Outdoor SB-35 (315E142-190) - White Outdoor Snow Boss Snow Thrower (1995)Engine Support and Gas Tank
White OutdoorWhite Outdoor SB-40 (315-152-190) - White Outdoor Snow Boss Snow Thrower (1995)Gas Tank & Pulley Illustration
MTDMTD 31A-261-718 - MTD Pro Snow Thrower (2005-2)General Assembly
Description
The Primer Bulb is a small round pliable plastic bubble or button located on the carburetor that when pressed draws fuel through the fuel line into the carb. Over time, exposure to chemicals in the fuel, grit from the fuel tank, and heat from the sun can harden the plastic primer bulb causing it to get brittle and crack. Home users often replace the primer bulb during their annual tune-up. Replacing the primer bulb is usually very simple and requires little more than a screwdriver.