117-7268 Spindle Assembly Fit for 42" 50" 54" Mower Deck Toro TimeCutter SS5000 MX3450 SS4200 Exmark Quest E S Series Lawn Mower Replaces OEM 117-0751, 117-7267, 117-7439 121-0751 117-7439

What It Is

This is a replacement spindle assembly for the cutting blades on select Toro TimeCutter and Exmark Quest zero-turn mowers with 42", 50", or 54" fabricated decks. It mounts the blade and houses the bearings that allow the blade to spin freely at high RPM.

Fitment & Compatibility

Before buying, confirm your deck size (42", 50", or 54") and verify your mower model is listed: Toro TimeCutter SS5000, MX3450, SS4200, or Exmark Quest E/S Series. This spindle replaces OEM numbers 117-0751, 117-7267, 117-7439, 121-0751, and 117-7439. Measure the mounting bolt pattern (typically 3-bolt) and the spindle shaft diameter (usually 5/8" or 3/4") to match your existing assembly. Check that your blade bolt threads match (often 5/8"-18 or 3/8"-24). If your deck uses a different pulley or belt routing, verify pulley height and diameter match the original.

Key Things to Know

• Quality: Aftermarket part; most users report it works as well as OEM, but some note bearing life may be shorter than genuine Toro spindles.
• Installation difficulty: Moderate. Requires removing the blade, pulley, and mounting bolts; a torque wrench is recommended (blade bolt torque typically 50-70 ft-lbs).
• Common gotchas: The spindle may not include the pulley or blade – reuse your existing ones. Ensure the spindle shaft is clean and free of debris before installing. Over-tightening the blade bolt can damage bearings.
• Check for play: Before installing, spin the spindle by hand; it should rotate smoothly with no wobble or grinding.

Should You Buy It

If you need a budget-friendly replacement for a worn or damaged spindle on a Toro TimeCutter or Exmark Quest with a fabricated deck, this is a solid choice. It’s best for DIY owners who don’t mind minor fitment checks and want to save over OEM pricing. For commercial use or if you need guaranteed long-term durability, consider OEM.