ACEBRI PTO Clutch for Cub Cadet for Troy-Bilt for Craftsman: 917-1709 717-1709, 1706692SM, for Troy-Bilt for Cub Cadet RZT50 ZT50 RZT17 RZT22 RZT42 Z-Force 15 18 42 44 48 Clutch, 1" Crank

What It Is

This is an aftermarket PTO (Power Take-Off) clutch that engages and disengages your mower blades. It’s designed for select Cub Cadet, Troy-Bilt, and Craftsman zero-turn and lawn tractors with a 1-inch crankshaft, typically on 42- to 50-inch decks.

Fitment & Compatibility

Before buying, confirm all three of these:

• Crankshaft diameter: Must be exactly 1 inch. Measure yours with calipers—don’t guess.
• OEM cross-reference: Replaces Cub Cadet/Troy-Bilt part numbers 917-1709, 717-1709, and 1706692SM. Verify your original part number.
• Model fit: Commonly fits Cub Cadet RZT50, ZT50, RZT17, RZT22, RZT42, and Z-Force 15/18/42/44/48 series. Also fits select Troy-Bilt and Craftsman models with same PTO. Check your mower’s model number against the seller’s fitment list—deck size alone isn’t enough.

Important: This is an aftermarket clutch, not OEM. It may differ slightly in appearance, but it’s built to the same specs. If you have a different crankshaft size (e.g., 7/8-inch or 1-1/8-inch), this won’t fit.

Key Things to Know

• Installation difficulty: Moderate. You’ll need basic tools (wrenches, socket set) and mechanical comfort. Expect 1–2 hours. The hardest part is often removing the old clutch from a stuck shaft.
• Air gap adjustment: After installation, you must set the air gap between the rotor and armature (typically 0.010–0.015 inches). This is critical for proper engagement and clutch life.
• Wiring: Most units use a two-wire connector. If your mower has a different plug, you may need to splice or replace connectors. Match wire colors (usually black/ground, red/hot).
• Quality note: With a 4.4/5 rating from 16 reviews, most buyers report it works well, but a few mention shorter lifespan vs. OEM. It’s a solid budget option, not a premium part.

Should You Buy It

Buy this if you need a reliable, affordable replacement for a failed PTO clutch on a Cub Cadet, Troy-Bilt, or Craftsman with a 1-inch crank and you’re comfortable with basic mechanical work and air gap adjustment. Skip it if you want OEM longevity or need a clutch for a different crankshaft size.