570682A 951-10639A Primer Bulb

Key Features

• Direct replacement primer bulb for small engines.
• Facilitates cold starts by delivering fuel directly to the carburetor.
• Features a two-tab mounting design for secure installation.
• Constructed from fuel-resistant material for durability with gasoline and ethanol blends.

Replaces / Cross-Reference Part Numbers

• MTD: 751-10639, 751-10639A, 951-10639, 951-10639A, 951-10888A
• Tecumseh: 570682, 570682A, 321802A

Compatibility & Fitment

• Fits a wide range of snowblowers and other outdoor power equipment.
• Compatible Brands: MTD, Tecumseh, Cub Cadet, Craftsman, Troy-Bilt, Ryobi, Bolens, Yard Machines.
• Tecumseh Engines: Fits SnowKing models including AV520, HMSK100, HMSK105, and HMSK110.
• MTD Snowblower Models: Fits series 161-JW, 165-SU, 370-SUB, 483-SU, and 490-SU.

When to Replace

• The existing bulb is cracked, hazy, or brittle.
• The bulb does not return to its original shape after being pressed.
• Fuel is leaking from or around the primer bulb assembly.
• The engine becomes difficult to start and requires excessive priming.

Installation Tips

• Ensure the engine is cool and disconnect the spark plug wire before starting work.
• Note the orientation of the fuel lines before disconnecting them from the old bulb.
• Squeeze the two mounting tabs on the old bulb to release it from the housing.
• Insert the new bulb until the two mounting tabs click securely into place.
• Reconnect the fuel lines to the correct ports on the new bulb.