Youxmoto 50 inch Mower Deck Rebuild Kit Fit for Cub Cadet Troy Bilt RZT 50,ZT50,RZT-50, 3 Spindles 618-04125 618-04126, 3 Blade 742-04053A,3 Idler 756-04129,1 Belt 754-04044, 4 Deck Wheel 734-04155

What It Is

This is a complete 50-inch mower deck rebuild kit designed to replace worn spindles, blades, idler pulleys, belt, and deck wheels on Cub Cadet and Troy-Bilt zero-turn mowers with a 50-inch cutting deck. It’s meant for a full deck overhaul, not a single-part swap.

Fitment & Compatibility

Before buying, confirm your mower has a 50-inch deck—not 46 or 54 inches. The kit fits Cub Cadet RZT 50, ZT50, and RZT-50 models, plus Troy-Bilt equivalents. Check your deck’s OEM part numbers: spindles replace 618-04125 and 618-04126; blades replace 742-04053A; idlers replace 756-04129; belt replaces 754-04044; deck wheels replace 734-04155. If your machine uses different numbers, this kit won’t match. Measure your existing blade length (should be ~16.5 inches) and belt length (approx. 105 inches) to verify. This is an aftermarket kit, not OEM Cub Cadet—quality and tolerances can vary.

Key Things to Know

• Installation difficulty: Moderate. You’ll need basic tools (wrenches, sockets, a jack to lift the mower) and about 2–3 hours. Spindle removal may require a puller if rusted.
• Quality notes: Spindles and blades are functional but not premium—expect adequate life for residential use. The belt may be slightly stiff initially; run the deck for 5–10 minutes to seat it.
• Common gotcha: Deck wheels are plastic and may crack under heavy side-loading. Consider upgrading to steel wheels if you mow rough terrain.
• Check for missing hardware: Some kits ship without spindle bolts or lock washers—have replacements on hand (typically 5/16-18 x 1-inch bolts).

Should You Buy It

Buy this kit if your 50-inch Cub Cadet or Troy-Bilt deck has multiple worn components (wobbly spindles, dull blades, slipping belt) and you want a single-box solution for a full rebuild on a tight budget. Skip it if you need OEM-grade durability for commercial use or if your deck model uses different part numbers—then buy individual OEM replacements.