ACEBRI PTO Clutch for John Deere STX38/STX46 and Toro (1" Shaft, 5.375" Pulley) High-Torque, CCW

ACEBRI PTO Clutch is a direct-fit electric mower clutch designed to replace worn or faulty PTO clutches on John Deere STX38/STX46 and many Toro TimeCutter/Zero-turn models.

This replacement ACEBRI clutch delivers the mounting pattern, pulley diameter, and CCW rotation required for a broad range of lawn tractor and zero-turn mower models. Built from heat-treated steel with manufacturing steps to increase initial torque and braking performance, it aims to restore deck engagement and reliable blade control without modifying your machine. Before ordering, check the fit list below against your machine's model and serial number to ensure compatibility.

What models and part numbers does this clutch fit?

ACEBRI provides a long compatibility list covering multiple brands and OEM numbers. It replaces several Toro, John Deere, Craftsman/Sears, Warner, Stens, AYP/Roper/Dixon/Husqvarna and Exmark part numbers, so verify your mower's part reference and serial range.

• Toro: 104-3334, 117-7468, 105-3462 and TimeCutter Z4200/Z4235/SS3200S/MX4260 serial ranges noted.
• John Deere: AM119683 for STX38 and STX46 models.
• Warner cross-references: 5217-series variations and Craftsman/Sears 532145028.
• Other cross-refs: STENS 255-511, Husqvarna 120756/539120756, Exmark applications listed.

How do the clutch specifications match my mower?

This clutch is specified for a 1" crankshaft with a 5.375" pulley diameter, counterclockwise rotation and rated torque appropriate for common residential mower decks. Confirm these physical specs on your original clutch or parts diagram before installing.

• Crankshaft bore: 1 inch.
• Pulley diameter: 5.375 inches.
• Rotation: counterclockwise (CCW).
• Rated starting torque designed for standard deck engagement.

What materials and performance features does ACEBRI use?

The ACEBRI clutch uses high-quality, heat-treated steel processed to withstand varying temperatures and deliver stronger initial torque and reliable braking compared with untreated components. Manufacturing steps focus on consistent material strength and assembly to reduce early wear.

• High-temperature steel processing for durability.
• Enhanced initial torque for positive blade engagement.
• Designed to maintain performance in hot and cold conditions.
• Same internal design across packaging variations.

How easy is installation and what should I watch for?

Installation is straightforward for mechanically skilled users with basic tools. Remove the old clutch, confirm the shaft size and keyway alignment, then mount and torque the new unit to factory specifications. If you’re unsure, a mower technician can complete the swap quickly.

• Prepare basic hand tools and service manual torque specs.
• Check keyway orientation and shaft seating before tightening.
• Test electrical engagement and safety interlocks after fitting.
• Contact ACEBRI support if fitment questions arise.

Who is this for? This ACEBRI PTO clutch is aimed at homeowners and small-tractor owners who need a reliable, budget-friendly replacement for a failed PTO clutch on John Deere STX38/STX46, Toro TimeCutter and many compatible models. It’s suitable for do-it-yourselfers comfortable with basic mechanical work, repair shops seeking a cross-referenced replacement, and anyone restoring safe blade engagement on their mower deck. Always confirm part numbers, shaft size, and rotation before purchase and follow safety procedures during installation.