OCPTY 917-05121 PTO Clutch Replacement for Warner: 5217-53/44,for Cub Cadet/Mtd/Troy Bilt/White: 717-05121 917-05121 717/917-04376, for Cub Cadet RZT-L42, RZT-S42(2013 and 2014 MDS) Mower Clutch

What It Is

This is a replacement PTO (power take-off) electric clutch that engages and disengages the mower blades on select Cub Cadet, MTD, Troy-Bilt, and White zero-turn and lawn tractors. It’s designed for models using the OEM part numbers 717-05121, 917-05121, or 717/917-04376, and directly replaces the Warner 5217-53/44 clutch.

Fitment & Compatibility

Before buying, check these specifics:

• Confirmed models: Cub Cadet RZT-L42 and RZT-S42 (2013 and 2014 MDS builds). Also fits many MTD, Troy-Bilt, and White tractors with the same clutch part numbers.
• Measurements: This clutch has a 1-inch bore shaft, 3 mounting holes on 3.25-inch centers, and an overall diameter of approximately 4.5 inches. Measure your old clutch to confirm.
• OEM vs. aftermarket: This is an aftermarket replacement, not genuine Cub Cadet. It matches the OEM fit but may have slight differences in wire length or connector style. Verify your existing connector type (typically a 2-pin flat or round plug) and that the wire length (roughly 10 inches) reaches your harness.
• Cross-check your deck: Works with 42-inch and similar decks on the listed models. If you have a different deck size or model year outside 2013-2014, double-check your original part number against the list above.

Key Things to Know

• Quality: Rated 4.3/5 from 54 reviews. Most users report a direct bolt-on fit, but a few note the engagement is slightly noisier than OEM. It’s a budget-friendly alternative to a $150+ genuine part.
• Installation difficulty: Moderate. You’ll need basic hand tools (sockets, wrenches) and a torque wrench. The clutch bolts to the engine crankshaft and the wiring plugs into the harness. Plan 1-2 hours.
• Common gotchas: The air gap (between clutch rotor and armature) may need adjustment after installation—usually 0.010–0.015 inches. If the blades don’t engage or slip, check this first. Also, ensure the keyway on the crankshaft aligns with the clutch’s key slot; a missing key can cause failure.
• Wiring note: If your original connector is damaged, you may need to splice the new clutch’s wires. Use heat-shrink connectors for a weatherproof seal.

Should You Buy It

If you own a 2013-2014 Cub Cadet RZT-L42 or RZT-S42 (or a compatible MTD/Troy-Bilt/White model) and need a reliable, cost-effective replacement for a worn or failed PTO clutch, this is a solid choice. It’s not a premium OEM part, but for the price, it delivers dependable performance for most homeowners and light commercial use. Avoid if you need exact OEM fitment or have a unique deck setup not listed.