PTO Clutch 717-04174, 917-04174 for Cub Cadet MTD LT1042 LT1045 SLT1550 SLTX1054 LTG1054 LTG1050 GT54 GT50 Big Red Horse Horse Series, Warner 5219-64 5219-79 717-04552A

What It Is

This is an electric PTO (power take-off) clutch that engages and disengages the mower deck blades. It fits Cub Cadet, MTD, and Horse series lawn tractors from the early 2000s to mid-2010s, including popular models like the LT1042, LT1045, SLT1550, and GT54.

Fitment & Compatibility

Before buying, verify three things:

1. Model & deck size: This clutch fits tractors with 42–54 inch decks. Check your model tag (under seat or on frame) for exact numbers like LT1042, SLTX1054, or GT50.
2. OEM cross-references: Replaces OEM numbers 717-04174, 917-04174, and 717-04552A. Also compatible with Warner 5219-64 and 5219-79.
3. Physical measurements: Clutch OD is 4.5 inches, shaft bore is 1 inch (25.4mm), engagement voltage is 12V DC. Measure your existing clutch and shaft to confirm fit—early models may differ slightly.

Common gotcha: The LT1042 uses this clutch only with the 42-inch deck. If your tractor has a 46-inch or larger deck, it may require a different clutch (e.g., 717-04175). Always double-check your deck size and model number.

Key Things to Know

• Quality: Aftermarket unit with solid reviews (4.6/5). Most users report it matches OEM performance, but inspect the wiring harness connector—some aftermarket versions use a slightly different plug that may require splicing.
• Installation difficulty: Moderate. Requires removing the mower deck, disconnecting the wiring harness, and unbolting the old clutch (usually 3 bolts). You’ll need a puller to remove the old clutch from the crankshaft—don’t try to pry it off.
• Common gotchas:
  • The air gap (0.010–0.020 inches) must be reset after installation. If the clutch doesn’t engage, the gap is too wide.
  • If your old clutch failed due to a seized bearing, inspect the crankshaft for damage or wobble before installing the new one.
  • The wiring harness may be short; route it carefully to avoid rubbing against the belt or pulleys.

Should You Buy It

If you own a Cub Cadet or MTD lawn tractor from the LT or GT series with a 42–54 inch deck and your PTO clutch is slipping, making grinding noises, or not engaging, this is a reliable, cost-effective replacement. It’s not a genuine OEM part, but the build quality and warranty (usually 1 year) make it a solid choice for DIY repairs. Skip it if you need a clutch for a zero-turn or a commercial-duty mower—those require heavier-duty units.