FEXON 51528000 Lawn Mower Deck Spindle - Compatible with Ariens Ikon-X/XD/XL 52 & Edge 52 & Gravely ZTX/ZT XL 52 Zero-Turn Mower with 52" Decks Replaces 51537200

What It Is

The FEXON 51528000 is an aftermarket lawn mower deck spindle assembly designed to replace a worn or failed spindle on zero-turn mowers with a 52-inch deck. It drives the mower blade, and this specific model fits select Ariens Ikon-X/XD/XL and Gravely ZTX/ZT XL models.

Fitment & Compatibility

Check your deck size first. This spindle is for 52-inch decks only – not 48, 54, or 60 inches. It replaces OEM part numbers 51537200 and 51528000.

Confirmed compatible mowers:

• Ariens Ikon-X 52, Ikon-XD 52, Ikon-XL 52
• Ariens Edge 52
• Gravely ZTX 52, ZT XL 52

Before buying, verify:

• Your mower model number and deck size (stamped on the deck or frame)
• The spindle mounting hole pattern (4-bolt square pattern, 2.5" center-to-center)
• Spindle shaft diameter (5/8" with a keyway)
• Bearing type (sealed, pre-lubricated – no grease fitting)

Note: This is an aftermarket part, not OEM. It should fit, but minor differences in casting or finish are possible.

Key Things to Know

• Quality: Sealed bearings are pre-lubricated and should last 2-3 seasons with normal use. Not serviceable – replace when worn.
• Installation difficulty: Moderate. Requires removing the deck, belt, blade, and retaining hardware. A socket set, wrench, and torque wrench (for blade nut) are needed.
• Common gotchas: The spindle housing may be slightly taller or shorter than OEM – check blade clearance under your deck before tightening everything. Also, ensure the pulley key aligns properly with the shaft keyway.
• Warranty: FEXON typically offers 1-year replacement coverage. Keep your receipt.

Should You Buy It

If you own one of the listed Ariens or Gravely zero-turns with a 52" deck and need a reliable, budget-friendly spindle replacement, this is a solid pick. It’s not for heavy commercial use, but for residential or light commercial mowing, it offers good value at half the OEM price. Just double-check your deck size and model number before ordering.