GELASKA 3 Pack 539112170 Spindle Assembly with 539113300 Spindle Pulley Replaces 5391121-70 for Husqvarna MZ61, MZ6125, MZD61, EZ6124, FD61M, MZ 28 ZT BF, MZ6125C, MZ6128BF, MZ61 EZ5224 Mowers

What It Is

This is a 3-pack of spindle assemblies (each includes pulley) that drives the mower blades on Husqvarna zero-turn mowers. Designed for commercial-grade 60-61 inch cutting decks, it replaces OEM part 539112170 and includes the 539113300 pulley.

Fitment & Compatibility

Critical check: This fits Husqvarna models with a 60” or 61” fabricated deck using the 539112170 spindle. Compatible models include MZ61, MZ6125, MZD61, EZ6124, FD61M, MZ28ZTBF, MZ6125C, MZ6128BF, MZ61, and EZ5224.

Before buying:

• Measure your existing spindle housing diameter (should be ~3.5” at the base) and shaft length (~3.75”).
• Confirm your deck uses a 3-spindle setup (not 2).
• Verify the pulley diameter matches your current one (usually 4.5” or 5”).
• This is an aftermarket replacement, not OEM Husqvarna—check that your deck’s bolt pattern aligns (4-bolt pattern, 3.5” center-to-center).

Key Things to Know

• Quality: Users report these are heavier-duty than OEM, with thicker steel housings and sealed bearings. Good for commercial use.
• Installation: Moderate difficulty. Requires removing the deck, unbolting the old spindle (3 bolts), and transferring the old pulley if not included. Torque to 30-40 ft-lbs.
• Gotcha: The spindle shaft is 1” diameter with a 1/4” keyway—ensure your blade adapter matches. Some users needed to reuse the original pulley if the included one’s offset differs.
• Warranty: No manufacturer warranty listed; check return policy before buying.

Should You Buy It

Buy this if you have a compatible Husqvarna zero-turn with a 60-61” deck and want a cost-effective, durable replacement for worn spindles. It’s a good value for commercial mowing or heavy residential use, but verify your existing pulley and shaft specs first—especially on older decks.