Xtreme Outdoor Power Equipment X0401 PTO Clutch Compatible with/Replacement for Cub Cadet RZT-L42 and RZT-S42 2013-2014, MTD Z6000, ZT42 and ZT-L42, Troy-Bilt Mustang 42 XP 2013-2014 717-05121

What It Is

The Xtreme Outdoor Power Equipment X0401 is an aftermarket PTO (power take-off) clutch that engages and disengages the mower blades on select zero-turn and lawn tractors. It’s designed for residential/commercial mowing on 42-inch deck models from Cub Cadet, MTD, and Troy-Bilt.

Fitment & Compatibility

Before buying, verify your mower’s model and year. This clutch replaces OEM part 717-05121 and fits:

• Cub Cadet RZT-L42 and RZT-S42 (2013–2014 only)
• MTD Z6000, ZT42, and ZT-L42 (check year)
• Troy-Bilt Mustang 42 XP (2013–2014 only)

Measure your existing clutch: shaft diameter (typically 1 inch), bolt pattern (three-bolt or four-bolt), and overall thickness. The X0401 matches the OEM 717-05121 dimensions, but if your mower has a different deck size (e.g., 46-inch or 50-inch) or an older model year, it won’t fit. Always cross-reference your mower’s serial number with the compatibility list.

Key Things to Know

• Quality vs. OEM: Xtreme Outdoor is a reputable aftermarket brand, but some users report slightly shorter lifespan than OEM (Cub Cadet/MTD) clutches, especially in heavy commercial use.
• Installation difficulty: Moderate. You’ll need basic mechanical skills—disconnect battery, remove belt, unbolt old clutch, install new one, and align belt. Wiring is plug-and-play if your mower’s connector matches.
• Common gotchas: The clutch may require a 0.010–0.020-inch air gap adjustment after installation (use feeler gauges). Also, ensure the belt is routed correctly; a misaligned belt can cause premature wear.
• Warranty: Typically 1-year limited warranty (check seller). OEM clutches often have 2-year coverage.

Should You Buy It

If you need a cost-effective replacement for a 2013–2014 Cub Cadet, MTD, or Troy-Bilt 42-inch zero-turn and don’t mind a slightly lower durability than OEM, the X0401 is a solid choice. It’s best for residential or light commercial use—skip it for heavy daily commercial mowing where OEM reliability is critical.