917-05121 MTD Cub Cadet Craftsman PTO Clutch Replacement

This clutch is a high-quality replacement from the Rotary Corporation. This is Rotary Item #17681.

It is a direct replacement for Warner part numbers 5217-90 and 5217-77.

It is a more affordable replacement for MTD Cub Cadet part number 917-05121, which now replaces the old clutch part number 717-05121. 

Please refer to a parts diagram for your specific lawn mower's model and serial number to determine whether this clutch fits your mower.  It fits some, but not all, Craftsman models Z6000 and ZS6500.  Fits some, but not all, Cub Cadet models ZT1-42, RZT-L42, and RZT-S42.  It also fits some Yard Machines, Troy-Bilt, and other brands.

Replaces OEM Part Numbers:

• MTD 917-05121
• MTD 717-05121
• Cub Cadet 917-05121
• Cub Cadet 717-05121
• Troy-Bilt 917-05121
• Troy-Bilt 717-05121
• Craftsman 917-05121
• Craftsman 717-05121

Dimensions:

• Bore ID: 1"
• Rotation: CCW
• Torque: 80 lb-ft

The Warner sticker on your clutch should have Warner P/N 5217-90 (521790).  Warner 5217-90 now replaces Warner 5217-77.