Electric PTO Clutch for Cub Cadet LT1045 RZT50 Troy-Bilt Big Red GT54 MTD White Warner Replacement Part Number 5219-51 717-04174 917-04174 5219-64

What It Is

This is an electric PTO (power take-off) clutch that engages and disengages the mower deck blades on select Cub Cadet, Troy-Bilt, MTD, and White lawn tractors. It replaces OEM part numbers 5219-51, 717-04174, 917-04174, and 5219-64, and is a direct fit for models like the Cub Cadet LT1045, RZT50, Troy-Bilt Big Red GT54, and similar MTD-platform machines.

Fitment & Compatibility

Before buying, confirm your mower’s model number and deck size—this clutch is designed for 42- to 54-inch decks on these brands. Check the OEM part number on your old clutch (stamped on the side) against the listed replacements. Measure the shaft diameter (typically 1 inch) and bolt pattern (usually 3-bolt, 2.5-inch circle). Also verify the electrical connector type—most use a 2-pin flat connector. This clutch is an aftermarket replacement, not OEM, so double-check that your mower’s mounting bracket and pulley alignment match the dimensions (approx. 4.5-inch OD pulley).

Key Things to Know

• Quality: Aftermarket, but rated 4.8/5 from 33 reviews—users report it’s reliable and quieter than some OEM clutches. Expect a 1-year warranty.
• Installation Difficulty: Moderate. You’ll need basic tools (wrenches, socket set, puller for the old clutch). Disconnect the battery and remove the mower deck for access. Allow 1-2 hours.
• Common Gotchas: The air gap between the clutch and rotor must be set to 0.010-0.015 inches using a feeler gauge—too tight or loose causes slipping or noise. Also, the wiring harness may need slight modification if your mower uses a different connector (check polarity).
• Testing: After install, run the engine at full throttle and engage the PTO—listen for grinding or failure to engage. If it doesn’t work, recheck the air gap and wiring.

Should You Buy It

If you need a cost-effective replacement for a worn or failed PTO clutch on a Cub Cadet, Troy-Bilt, or MTD tractor with a 42-54-inch deck, this is a solid choice with strong user reviews. It’s not for zero-turn mowers with different shaft sizes or unusual bolt patterns—confirm fitment first. For DIYers, it’s a good value; for pros, it’s a reliable backup.