Bularie Flat Idler Pulley Kit - 3-Pack Replacement for 32-54 in Mower Decks, Heavy-Duty Metal with Mounting Hardware

Bularie flat idler pulley 3-pack is a direct-fit replacement pulley kit designed to restore correct V-belt tension and reliable deck drive performance on many 32"–54" mower decks.

When a worn idler pulley causes belt slip, noise, or uneven blade engagement, the right replacement part saves time and prevents further damage. This Bularie kit replaces common OEM numbers including Toro 106-2175 and Exmark 132-9420, and includes three pulleys plus the mounting hardware you need for a quick service. The components are machined to precise dimensions and built from heavy-duty metal to stand up to lawn mower duty.

Which machines and deck sizes will this kit fit?

This pulley assembly is compatible with multiple makes and models of zero-turns and riding mowers. It’s specified for several Toro TimeCutter and MX series machines, Exmark Quest models, and select Lawn-Boy Precision Z series tractors, covering typical 32", 38", 42", 50" and 54" deck applications. Always cross-check the OEM number on your original pulley before ordering to ensure proper fitment.

• Works with Toro TimeCutter SS5000, SS5035, SS4225, SS4235, SS5060 and MX/MX4 series
• Fits Exmark Quest E-Series & S-Series with 42", 50" and 54" decks
• Compatible with Lawn-Boy Precision Z310, Z320 H and Z330 Lx zero-turns
• Intended for 32"–54" cutting decks — verify OEM part numbers before purchase

How does this pulley kit improve deck belt performance?

Replacing a worn or damaged idler pulley restores consistent belt tension and reduces slippage, which helps maintain blade speed and smooth engagement. The included hardware ensures the pulley is mounted correctly so the belt tracks properly, minimizing wear on both belt and spindle sheaves. Improved belt control also reduces vibration and operational noise.

• Applies stable tension to the V-belt to reduce slipping
• Prevents premature belt and component wear through better alignment
• Heavy-duty metal construction for long-lasting operation
• Included lock nuts and washers secure the pulley under load

What are the pulley dimensions and mounting details?

The pulleys are manufactured to match common OEM dimensions so they sit properly in factory idler brackets. Each pulley has a 3/8" inner bore and a 4 1/8" outer diameter with a height of 1 7/16", allowing a compatible V-belt profile and clearance. The kit includes 3/8" hardware sized to standard mower idler threads for immediate installation.

• Inner diameter (bore): 3/8" for standard idler bolts
• Outer diameter: 4 1/8" to match V-belt contact surface
• Height: 1 7/16" for correct belt wrap and clearance
• Hardware: 3 bolts, 3 washers, 3 flanged nylon lock nuts included

What comes in the package and how easy is installation?

The box contains three flat idler pulleys and a full mounting hardware kit, making it suitable for servicing multiple pulleys or keeping spares on hand. Installation is straightforward for anyone familiar with deck belt replacement: remove the old pulley, reposition the bracket, and secure the new pulley with the supplied hardware. No specialty tools are required beyond standard sockets and wrenches.

• 3 x flat idler pulleys plus mounting kit included
• Mounting kit: 3/8"-16 x 1-3/4" hex bolts, washers, flanged nylon lock nuts
• Packaged securely for safe delivery and storage
• Simple bolt-on replacement — basic hand tools needed

Who is this for: This Bularie 3PK flat idler pulley kit is for homeowners, landscapers, and service technicians who maintain Toro, Exmark, Lawn-Boy and similar zero-turn and riding mowers. It’s ideal if you need a direct OEM-number replacement, want spare pulleys for routine maintenance, or prefer a complete kit with hardware to finish repairs quickly and keep your deck running efficiently.