46 Inch Deck Spindle Blade Set Fits for Cub Cadet RZT-L46, RZT-S46, Z6400, for Troy Bilt Mustang 46 XP, Spindle 618-05078, 618-05078A, 918-05078, 918-05078A,Blade 742-04244, 742-04244A, 742-04290

What It Is

This is a complete 46-inch deck spindle and blade set for zero-turn mowers, specifically designed to replace both the spindle assembly and blades on Cub Cadet RZT and Troy Bilt Mustang 46 XP models. It’s a direct swap for worn or damaged spindles and blades on residential/commercial 46-inch fabricated decks.

Fitment & Compatibility

Before buying, verify your mower’s model and deck size. This set fits:

• Cub Cadet: RZT-L46, RZT-S46, Z6400 (46-inch deck)
• Troy Bilt: Mustang 46 XP (46-inch deck)

Check your existing spindle part numbers: 618-05078, 618-05078A, 918-05078, or 918-05078A. For blades, confirm you need 742-04244, 742-04244A, or 742-04290. Measure your blade length—must be 18 inches (standard for 46-inch decks). OEM replacements, but aftermarket compatible if the dimensions match exactly. Not for 42-inch or 54-inch decks.

Key Things to Know

• Quality: Cast iron spindle housing and hardened steel blades—durable for heavy use. Expect 2-3 seasons of residential cutting before blade replacement.
• Installation: Moderate difficulty. Requires removing the deck, unbolting the old spindle (3 bolts), and transferring the pulley and bearing. Have a socket set, torque wrench (40-50 ft-lbs on spindle bolts), and penetrating oil for rusted fasteners.
• Common gotcha: The blade set includes three blades—ensure your deck uses a triple-blade setup (most 46-inch zero-turns do). Single-blade decks won’t work.
• No extra hardware: You’ll reuse your existing pulley, bolts, and spacers. Inspect them for wear before reassembly.

Should You Buy It

Yes, if you own a compatible Cub Cadet or Troy Bilt zero-turn with a 46-inch deck and need a reliable, all-in-one spindle and blade replacement. It’s a solid value for DIYers who want OEM-quality fit without separate part sourcing. Skip if your deck is smaller or you need only blades or spindles individually.