MTD Snowblower Gearbox Worm Gear 917-05019

Basic information

• Part name: Snowblower gearbox worm gear
• Manufacturer: MTD
• Category: Snowblower drivetrain and gearbox components
• Primary function: Transfers rotational motion through the gearbox to change speed or direction of rotation

Installation & compatibility

• Compatible models: Fits select MTD and Craftsman snowblowers; confirm compatibility using your models parts diagrams
• Installation difficulty: Medium; requires accessing the gearbox assembly and positioning the worm gear correctly
• Tools required: Wrench set, socket set, pliers

Additional information

This snowblower gearbox worm gear, part number 917-05019, installs inside the gearbox and meshes with other gears to transfer motion within the drivetrain. Worm gear designs help manage rotational direction and speed while maintaining controlled engagement between moving components.

If the worm gear threads wear, chip, or become damaged, the gearbox may not transfer motion smoothly. You might notice grinding noises, vibration, resistance, or inconsistent operation in the drive or chute rotation system if the gear does not mesh correctly.

Disconnect the spark plug wire before starting the repair to prevent accidental startup. Gearbox components can have sharp edges, so wearing work gloves can help protect your hands during installation. Make sure the worm gear is fully seated and meshes cleanly with mating components before returning the snowblower to service.