This Ox Clutch replacement for the Troy-Bilt 917-05121 PTO clutch is built for strength and dependable performance. Designed to match the original 917-05121 fitment, it installs easily and delivers smooth operation, steady torque transfer, and lasting reliability..

Because equipment diagrams can list multiple part numbers for the same mower model, always confirm the number printed on your original clutch before ordering. Doing so ensures you receive the correct replacement and the reliable performance Ox Clutch is known for.

Ox Clutch Takes the Electric PTO Clutch to the Next Level!

 Our 917-05121 clutches are designed with durability in mind

• Replaceable Wire Harness - CLICK HERE TO ORDER ADDITIONAL WIRE HARNESS
• Industrial/Commercial grade clutch
• Ultra Cool Bearing & Coil Technology
• State-of-the-Art Pulley Construction = 50% efficiency gain!
• Advanced Braking System = 20% faster stop time!
• Stainless Steel Construction
• High-Torque Capacity
• Trivalent Chromium Zinc Plating
• Lifetime Discount Program plus One Year Warranty!

CLICK HERE FOR MORE DETAILS ON WHAT MAKES OX CLUTCH SPECIAL

See our FAQ page for warranty and shipping details, or visit our YouTube channel for installation and troubleshooting tips.

ID: 1" 
Pulley Diameter: 6" 
Rotation: CCW

TO ENSURE YOU ARE ORDERING ACCURATELY, USE THE PART NUMBER THAT IS OFF OF THE ORIGINAL CLUTCH THAT WAS PHYSICALLY ON YOUR EQUIPMENT