Toro Brand [Lifetime Warranty] 570682A 951-10639A Primer Bulb with Fuel Line - Compatible with Tecumseh HMSK80 HMSK100 HMSK110 LH318SA AV520, MTD Craftsman Troy-Bilt Cub Cadet Snow Blower | Pack of 2
Two 570682A 951-10639A primer bulbs with attached black fuel lines and metal clips.
Dimensional diagram showing size measurements for 570682A primer bulb with fuel line.
Close-up of durable black fuel line for 570682A 951-10639A primer bulb assembly.
570682A primer bulb with fuel line and clips for MTD, Troy-Bilt, and Craftsman snowblowers.
570682A primer bulb with attached fuel line and two metal retaining clips for small engine repair.
Close-up of a red 570682A primer bulb for snowblower engines with a background showing a snowblower in operation.
570682A 951-10639A primer bulb with fuel line and clips, shown with engine priming benefits infographic.
Safety installation guide for 570682A primer bulb on a snowblower with safety tips and component close-up.
Two 570682A 951-10639A primer bulbs with attached black fuel lines and metal clips.
Dimensional diagram showing size measurements for 570682A primer bulb with fuel line.
Close-up of durable black fuel line for 570682A 951-10639A primer bulb assembly.
570682A primer bulb with fuel line and clips for MTD, Troy-Bilt, and Craftsman snowblowers.
570682A primer bulb with attached fuel line and two metal retaining clips for small engine repair.
Close-up of a red 570682A primer bulb for snowblower engines with a background showing a snowblower in operation.
570682A 951-10639A primer bulb with fuel line and clips, shown with engine priming benefits infographic.
Safety installation guide for 570682A primer bulb on a snowblower with safety tips and component close-up.
Lifetime Warranty

[Lifetime Warranty] 570682A 951-10639A Primer Bulb with Fuel Line - Compatible with Tecumseh HMSK80 HMSK100 HMSK110 LH318SA AV520, MTD Craftsman Troy-Bilt Cub Cadet Snow Blower | Pack of 2

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570682A / 951-10639A Primer Bulb with Fuel Line

Key Features

  • Package Includes: 2 primer bulbs, 2 fuel line hoses
  • Material: Durable, flexible polymer construction
  • Function: Primes carburetor for easier engine starting, especially in cold conditions
  • Fuel Compatibility: Suitable for use with gasoline and ethanol-blended fuels

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

  • Commonly used on snow blowers and snow throwers
  • Fits various models from brands including:
  • Craftsman
  • Cub Cadet
  • MTD
  • Tecumseh
  • Troy-Bilt
  • Yard Machine

When to Replace

  • Bulb is cracked, brittle, or has lost flexibility
  • Engine is difficult to start or will not start
  • Bulb does not return to its original shape after being pressed
  • Visible fuel leakage around the primer bulb assembly

Installation Tips

  • Ensure the engine is cool and drain any fuel from the tank before beginning work.
  • Note the routing and connection points of the original fuel lines before removal.
  • Cut the new fuel lines to the same length as the original lines.
  • Ensure all connections are secure to prevent air or fuel leaks.
  • After installation, press the new bulb several times to fill it with fuel and check for leaks before starting the engine.
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  • PERFECT FIT

    PERFECT FIT

    The 570682A Primer Bulb with Fuel Line perfectly fit MTD, Troy-Bilt, Craftsman, Ryobi, Toro, Yard Machines, Lawn-Boy, Bolens Snowblowers.
  • PREMIUM MATERIAL

    PREMIUM MATERIAL

    Crafted from resilient materials that resist cracking, this primer bulb and fuel line function well in harsh winter conditions.
  • 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

    Just 15 minutes of replacing to make the snowblowers run like new!
CONQUERED WINTER WITH EASE

CONQUERED WINTER WITH EASE

Simplify Snow Removal with Our Skid Shoes!
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 models
MTD 161-JW, 161-JWA, 165-SU, 478-SU, 483-SU, 365-SUA, 490-SU, 365-SUB, 370-SUB and 370-SUA
Craftsman 24788782, 24788846, 247889701, 24788791, 24788691, 24788957, 24788720, 247887050, 247887550, 247887040, 24788955, 24788970 Snow Blower
Ryobi 31AE162-013, 31AE162-034 Snow Blower
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

FAQ

This kit replaces part numbers 570682A, 570682, 951-10639A, 951-10639, 751-10639A, and 751-10639. It also serves as a replacement for primer assembly numbers 951-10888A, 951-10888B, 951-10888, and 751-10888. Always match the part number from your model diagram before ordering, especially if your machine uses the 951-10888-series setup.
This primer bulb and fuel line kit is compatible with snow blowers and small-engine equipment from Tecumseh, MTD, Troy-Bilt, Craftsman, Yard Machines, Cub Cadet, Ryobi, Bolens, and Lawn-Boy. Compatibility depends on the exact model and engine configuration; verify your original part number against 570682A, 951-10639A, 951-10639, 751-10639A, or 751-10639 to ensure a proper fit.
This primer bulb is designed for use with Tecumseh snow engine applications, including the AV520, HMSK100, HMSK105, and HMSK110. Because Tecumseh used multiple primer configurations across production runs, verify compatibility by your specific engine model and original part number.
Typical symptoms include a cracked or hardened primer bulb, fuel leaking around the bulb or hose, the bulb failing to spring back after pressing, weak or no fuel draw, hard starting when cold, or an engine that only starts with the use of starting fluid. Brittle or split fuel line tubing is also a clear indicator that this kit should be replaced.
Installation is a simple to moderate repair that typically takes 15 to 30 minutes on most snow blowers. You will need needle-nose pliers, a screwdriver, and potentially side cutters or a pick to remove the old fuel line. We recommend noting or photographing the hose routing before removal to ensure the new line is installed correctly.
Failure is commonly caused by age, cold-weather hardening, vibration, and prolonged fuel exposure. Ethanol-blended fuels can cause rubber components to stiffen or dry out, resulting in cracks, air leaks, and poor priming. If the machine has been stored with old fuel, we recommend inspecting the fuel line, tank grommets, and carburetor inlet area, as these parts often deteriorate at the same rate.