Xtreme Outdoor Power Equipment X0391 PTO Clutch Compatible with/Replacement for Cub Cadet RZT Series, MTD ZT42, ZT50 and ZT5000, Troy-Bilt Mustang XP 2009 717-04183, 717-04622, 917-04183, 917-0462

What It Is

The Xtreme Outdoor Power Equipment X0391 is an aftermarket PTO (Power Take-Off) clutch that engages and disengages your mower deck blades. It’s designed for zero-turn and lawn tractors from Cub Cadet, MTD, and Troy-Bilt, primarily models with 42–50-inch decks.

Fitment & Compatibility

Before buying, verify three things:

• Model number: Directly replaces OEM part numbers 717-04183, 717-04622, 917-04183, and 917-04622.
• Machine compatibility: Fits Cub Cadet RZT series (RZT42, RZT50, RZT5000), MTD ZT42, ZT50, ZT5000, and Troy-Bilt Mustang XP 2009.
• Physical dimensions: This clutch has a 1-inch bore and 3-bolt mounting pattern. Measure your old clutch’s shaft diameter, bolt spacing, and overall height (approx. 3.5–4 inches) to confirm. Deck size alone isn’t enough—cross-check your mower’s model number against the list.

Key Things to Know

• Quality vs. OEM: Aftermarket, but rated 5.0 stars from 3 reviews. Expect comparable performance to OEM at a lower price, but lifespan may vary.
• Installation difficulty: Moderate. You’ll need basic mechanical skills, a puller for the old clutch, and a torque wrench (specs often 30–40 ft-lbs). Disconnect battery first.
• Common gotcha: The wiring harness plug may differ slightly from OEM. You may need to splice or replace connectors. Also, check the air gap (0.010–0.015 inches) after installation.
• No warranty details listed: Verify return policy before purchase, as aftermarket parts sometimes have shorter coverage.

Should You Buy It

Buy this if you need a cost-effective replacement for a failed PTO clutch on a compatible Cub Cadet, MTD, or Troy-Bilt zero-turn, and you’re comfortable with moderate DIY installation. Skip it if you prefer OEM for warranty simplicity or have a non-listed model—cross-reference your exact machine first.