BOSFLAG mower spindle kit 3PK with belt — fits Toro SS/MX/ZS decks, sealed bearings, 1/2" x 142" belt

BOSFLAG 3PK 139-3214 is a three-spindle replacement kit that includes one 119-8820 deck belt, engineered to restore cutting performance on compatible Toro and Exmark decks.

Replace worn mower spindles and a stretched belt in one go with this value pack designed to fit a wide range of Toro SS, MX and ZS series decks plus selected Exmark models. Each spindle in the set is built with sealed bearings and a hardened housing to support smooth blade rotation under normal mowing loads. The included 119-8820 belt (1/2" x 142") matches common deck routing so you can complete a full deck service without hunting for parts.

Which mower models will this BOSFLAG kit fit?

This 3-pack targets many Toro TimeCutter, SS and MX series riding mowers and several Exmark Quest/CTS models. Use the parts cross-reference numbers to confirm compatibility with your deck model and serial ranges before purchasing.

• Replaces Toro spindle numbers 139-3214, 121-0751, 117-7439, 117-7267, 117-7268.
• Includes belt that replaces Toro 119-8820 (width 1/2", length 142").
• Listed fitment includes Toro ZS 5000, SS 5060/5035/5000, MX 5060/MX 5050/MX 5000 series and specific model numbers shown above.
• Compatible with selected Exmark Quest/CTS part numbers—verify your Exmark part code before install.

How does this kit improve deck performance?

Worn spindles and a stretched belt reduce cutting quality and can cause vibration or uneven blade speeds. Replacing all three spindles at once restores uniform blade rotation and the new belt keeps tension consistent across the pulleys for steady performance.

• Sealed bearings reduce contamination and help maintain smooth rotation.
• Matched belt length ensures correct deck tension and alignment.
• Three spindles allow full-deck overhaul for balanced cutting and less vibration.

What’s included and what tools do I need to install it?

The package supplies three complete spindle assemblies and one deck drive belt sized to replace Toro 119-8820. Basic hand tools and safety gear will handle most installs; professional help can be useful if pulleys or deck components need additional adjustment.

• Included: 3 spindle assemblies, 1 x 119-8820 replacement belt (1/2" x 142").
• Recommended tools: socket set, torque wrench, screwdrivers, jack or lift, and safety gloves/eye protection.
• Estimate: replace time varies by experience—plan for a few hours for a full deck swap.

Are these BOSFLAG spindles durable and reliable?

These spindle assemblies use sealed bearings and robust housings to withstand normal mowing conditions. While they are designed for durable everyday use, longevity depends on maintenance, cutting conditions and correct installation.

• Sealed bearings help limit dirt and moisture ingress for longer service life.
• Heavy-duty housing resists bending under typical load and impacts.
• Periodic lubrication and belt tension checks will prolong performance.

Who this is for: This BOSFLAG 3PK 139-3214 kit is ideal for owners or service shops maintaining Toro ZS, SS and MX series decks and compatible Exmark machines who want to replace all three deck spindles and the drive belt in one purchase. Choose this kit if you need a coordinated, cost-effective service solution for a full-deck refresh or to keep a spare set on hand for seasonal maintenance.