50 inch Mower Deck Rebuild Kit Fit for Cub Cadet ZT1-50 XT1-GT50 XT2-ST54 RZT 50 MTD G8200 G8300 Troy-Bilt Mustang XP 50 Lawn Mower Includes (3)Spindle 618-06980(3)Blade 942-05052A(1)Belt 954-04077A

What It Is

This is a complete 50-inch mower deck rebuild kit for select Cub Cadet, MTD, and Troy-Bilt zero-turn and garden tractors. It includes three spindle assemblies (part 618-06980), three blades (942-05052A), and one drive belt (954-04077A) to refresh a worn or damaged cutting deck.

Fitment & Compatibility

Before buying, confirm your mower has a 50-inch stamped steel deck (not fabricated). This kit fits Cub Cadet ZT1-50, XT1-GT50, XT2-ST54, RZT 50, plus MTD G8200/G8300 and Troy-Bilt Mustang XP 50. The spindle part number (618-06980) must match your existing spindles—check yours by removing a blade and looking for the stamped number on the spindle housing. The belt (954-04077A) is specific to 50-inch decks with a 7/8-inch width and 153-inch length; measure your old belt or confirm your model’s belt part. The blades (942-05052A) are 17.5 inches long with a 1-inch center hole and 5-point star drive—measure your current blades to verify.

Key Things to Know

• Aftermarket quality varies: These are non-OEM parts. Some users report spindles with slightly looser bearings or thinner housings than original Cub Cadet parts. Check reviews for recent batch quality.
• Installation is moderate: You’ll need a jack or ramps to access the deck underside, plus basic hand tools (socket set, wrench). Plan 1–2 hours for the full rebuild.
• Check deck condition first: If your deck shell is rusted or cracked, new spindles won’t fix structural issues. Inspect the deck mounting brackets and belt guides for wear.
• Blade bolt torque: Tighten blade bolts to 70–90 ft-lbs (check your manual). Over-tightening can strip the spindle threads.

Should You Buy It

If your 50-inch Cub Cadet or compatible MTD/Troy-Bilt mower has noisy spindles, dull blades, or a slipping belt, this kit offers a cost-effective one-stop refresh. It’s best for DIY owners comfortable with moderate mechanical work who want to avoid buying OEM parts individually (which often costs more). Skip it if you need exact OEM quality or if your deck has structural damage.