Craftsman Brand [Lifetime Warranty] 570682A 951-10639A Primer Bulb - Compatible with Tecumseh HMSK80 HMSK100 HMSK110 LH318SA AV520, MTD Craftsman Troy-Bilt Cub Cadet Snow Blower
Two red and black primer bulbs for small engines, showing top and bottom views.
Dimensional diagram showing the 1-3/4 inch width and 1-1/2 inch height of the 570682A 951-10639A primer bulb.
Close-up of red 570682A 951-10639A primer bulb showing durable PP material construction.
Red primer bulb replacement part for MTD, Troy-Bilt, and Craftsman snowblowers with compatibility graphic.
Replacement primer bulb for small engines, compatible with 570682A and 951-10639A parts.
Close-up of a red replacement primer bulb for snowblower engines on a promotional product graphic.
Red primer bulb replacement part for small engines with informational text overlay.
Compatibility chart for 951-10639A primer bulb showing Tecumseh, Toro, and Craftsman engine model numbers.
Two 570682A 951-10639A primer bulbs shown from top and bottom angles on a promotional BlueStars background.
Two red and black primer bulbs for small engines, showing top and bottom views.
Dimensional diagram showing the 1-3/4 inch width and 1-1/2 inch height of the 570682A 951-10639A primer bulb.
Close-up of red 570682A 951-10639A primer bulb showing durable PP material construction.
Red primer bulb replacement part for MTD, Troy-Bilt, and Craftsman snowblowers with compatibility graphic.
Replacement primer bulb for small engines, compatible with 570682A and 951-10639A parts.
Close-up of a red replacement primer bulb for snowblower engines on a promotional product graphic.
Red primer bulb replacement part for small engines with informational text overlay.
Compatibility chart for 951-10639A primer bulb showing Tecumseh, Toro, and Craftsman engine model numbers.
Two 570682A 951-10639A primer bulbs shown from top and bottom angles on a promotional BlueStars background.
Lifetime Warranty

[Lifetime Warranty] 570682A 951-10639A Primer Bulb - Compatible with Tecumseh HMSK80 HMSK100 HMSK110 LH318SA AV520, MTD Craftsman Troy-Bilt Cub Cadet Snow Blower

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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

  • Tecumseh: 570682A, 570682, 321802A
  • MTD (Craftsman / Troy-Bilt / Ryobi / Bolens / Yard Machines / Lawn-Boy / Yard-Man): 951-10639A, 951-10639, 751-10639, 951-10888A, 951-10888B
  • Stens: 056-200

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.
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  • Perfect fit

    Perfect fit

    Compatible with most snowblowers brands, such as Tecumseh, MTD, Bolens, Yard-Machines, Lawn-Boy, Ryobi, Craftsman, etc.
  • Premium quality

    Premium quality

    This bulb is made of advanced-quality PP material to give you a strong and durable replacement that can withstand harsh environments.
  • Saving solution

    Saving solution

    Enjoy the great feeling when your dryer is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble.
  • Simple installation

    Simple installation

    This kit will save your time with a quick fix. You just need to prepare basic hand tools and wear work gloves to ensure safety while repairing.
CONQUERED WINTER WITH EASE

CONQUERED WINTER WITH EASE

Big things come in small packages.
Brand Model Number
Tecumseh AV520, AV600, AH600, H30, H50, H35, H60, H70, HM70, HM80, HM100, HMSK80, HMSK85, HMSK90, HMSK100, HMSK105, HMSK110, HS40, HS50, HSK30, HSK35, HSK40, HSK50, HSK60, HSK70, HSK60, HSK70, HSK600, LH195SA, LH195SP, LH318SA, LH358SA, OH195SA, OH195SP, OH318SA, OH358SA, OHSK50, OHSK55, OHSK60, OHSK65, OHSK70, OHSK80, OHSK90, OHSK100, OHSK110, OHSK100, OHSK110, TH139SP, TV085XA, TVS600
MTD 161-JW, 161-JWA, 165-SU, 478-SU, 483-SU, 365-SUA, 490-SU, 365-SUB, 370-SUB, 370-SUA
Craftsman 24788782, 24788846, 247889701, 24788791, 24788691, 24788957, 24788720, 247887050, 247887550, 247887040, 24788955, 24788970
Ryobi 31AE162-013, 31AE162-034
Toro 38051, 38053, 38062, 38063, 38064, 38066, 38072, 38073, 38078, 38079, 38083, 38084, 38086, 38087, 38542, 38543, 38546, 38547, 38558, 38559, 38560, 38590, 38591, 38591
Package Dimensions
3.07 x 2.24 x 1.69 inches
Item Weight
0.634 ounces
Manufacturer
BlueStars

FAQ

This primer bulb is compatible with a wide range of snowblowers from MTD, Troy-Bilt, Craftsman, Cub Cadet, Ryobi, Bolens, Yard Machines, Yard-Man, Lawn-Boy, and Toro. It is specifically designed for use on MTD 31A model series snow throwers (2008-2014) and engines including Tecumseh AV520, HMSK100, HMSK105, and HMSK110.
This part replaces OEM numbers 570682A, 951-10639, 951-10639A, 751-10639, and 751-10639A.
You should inspect your primer bulb if you notice it has become cracked, brittle, or stiff, which often happens due to exposure to cold temperatures and ethanol-blended fuels. If the bulb fails to spring back after being pressed, or if it no longer draws fuel into the carburetor, it is likely leaking air and needs to be replaced to ensure proper engine starting.
Installation is straightforward and typically takes 10 to 15 minutes. You generally only need a pair of needle-nose pliers to remove the old fuel lines and secure the new bulb into the housing. Ensure the engine is cool and the fuel tank is not overfilled before beginning the replacement.
When installing, ensure the fuel lines are pushed firmly onto the new bulb's barbs to prevent air leaks. If the existing fuel lines are cracked or hardened, it is highly recommended to replace them at the same time to ensure a proper vacuum seal. Always verify that the bulb is seated securely in the control panel or carburetor housing before attempting to prime the engine.