Electric PTO Clutch Fits for Cub Cadet Troy Bilt 717-3403 917-3403 717-3403P Stens 255-419X, GT2186, GT2523, for MTD 1863, 1864, 2086, 2176, 2185 Lawn Mower

What It Is

This electric PTO (Power Take-Off) clutch engages and disengages the mower blades via an electromagnetic coil. It’s a direct replacement for the OEM part on Cub Cadet, Troy-Bilt, and MTD lawn tractors with 42–54-inch decks, commonly used for residential mowing.

Fitment & Compatibility

Before buying, verify these three things:

1. OEM part numbers: Fits 717-3403, 917-3403, and 717-3403P (original Cub Cadet/Troy-Bilt). Also cross-references Stens 255-419X.
2. Tractor models: Confirmed for Cub Cadet GT2186, GT2523, and MTD 1863, 1864, 2086, 2176, 2185. Check your model number under the seat or on the frame.
3. Physical dimensions: Measure your old clutch’s shaft diameter (typically 1” or 7/8”), mounting bolt pattern (3-bolt or 4-bolt), and overall thickness. This aftermarket unit matches OEM specs, but misalignment can cause vibration or failure.

Note: Not for zero-turn mowers or older mechanical PTO systems. If your deck is under 42” or over 54”, verify clearance.

Key Things to Know

• Quality: Aftermarket, not OEM. Reviewers note it’s durable for residential use but may not hold up as long under heavy commercial conditions.
• Installation difficulty: Moderate. You’ll need basic tools (wrenches, socket set) and a multimeter to test the coil resistance (expect ~2–4 ohms). A bad ground wire is a common installation mistake.
• Common gotchas:
  • The PTO switch must be disengaged before installation to avoid electrical shorts.
  • Air gap adjustment is critical—use a feeler gauge to set 0.010–0.015” gap between clutch and rotor.
  • Some users report the mounting bolts need thread-locker to prevent loosening during operation.
• Warranty: Usually 1 year (check seller). No return if installed and damaged.

Should You Buy It

If you need a budget-friendly replacement for a worn OEM clutch on a Cub Cadet, Troy-Bilt, or MTD lawn tractor (42–54” deck) and can handle a moderate DIY install, this is a solid choice. Avoid if you mow commercially or want a plug-and-play swap without adjusting the air gap—stick with OEM or a premium aftermarket brand.