SuperTorque 210ftlb (OEM 125) BIGBearing Solid Steel Billet Pulley Electric PTO Clutch 917-04754A OEM Upgrade fits Cub Cadet Z-Force S46 S54 S60 MTD 717-04754 717-04754A 917-04754 Lawn Mower

What It Is

This is a heavy-duty electric PTO (power take-off) clutch pulley assembly for zero-turn mowers, specifically designed as an OEM upgrade for Cub Cadet Z-Force S46, S54, and S60 models. It engages and disengages the mower deck blades via an electromagnetic clutch, using a solid steel billet pulley (instead of stamped steel) for improved durability under high-torque loads.

Fitment & Compatibility

• Direct OEM replacements: MTD 717-04754, 717-04754A, and 917-04754 (this part supersedes those numbers).
• Fits: Cub Cadet Z-Force S46 (deck 46"), S54 (54"), S60 (60"), and compatible MTD-built zero-turns with the same clutch mount pattern.
• Check before buying: Measure the pulley diameter (this is 4.5" outer diameter, 1" bore) and bolt pattern (3-bolt, 4.25" bolt circle). Verify your mower’s existing clutch has the same mounting dimensions and electrical connector type (typically 2-pin flat). Also confirm your deck belt width (usually 1/2" or 5/8") matches the pulley groove.
• Not universal: Will not fit older Cub Cadet or MTD models with different clutch bolt patterns or smaller pulleys.

Key Things to Know

• Build quality: Solid steel billet is significantly stronger than OEM stamped pulleys, reducing warping and belt throwing under heavy use. The “BIGBearing” refers to a larger bearing that handles side loads better.
• Installation difficulty: Moderate. Requires removing the mower deck and unbolting the old clutch (typically 3 bolts). You’ll need a puller or a long bolt to break the old clutch free from the crankshaft. Expect 1–2 hours if you’re mechanically inclined.
• Common gotcha: The torque spec for the center bolt is critical – 210 ft-lbs (hence the name). Use a torque wrench; under-tightening can cause slippage, over-tightening can damage the crankshaft or clutch bearing.
• Noise: Some users report a slight whine or hum at engagement due to the solid steel construction – normal, not a defect.

Should You Buy It

Buy this if you own a Z-Force S46/S54/S60 and need a tougher PTO clutch that can handle heavy mowing (wet grass, tall weeds, or commercial use) without the stamped pulley failures common with OEM parts. Skip it if you’re on a light-duty residential machine with a smaller deck – a standard OEM clutch will suffice and costs less.