ILONPA GY22172 Idler Pulley for GY20629 GY20067 GY20110 John Deere 102, 105, 115, 125 D105 D110 D140 D150 D155 D160 LA145 LA155 LA165 X140 X165 L2048 L2548 (2 Pack)

What It Is

The ILONPA GY22172 idler pulley is a replacement belt-tensioning pulley for select John Deere lawn tractors and zero-turn mowers. It keeps the mower deck belt tight during operation, preventing slipping and ensuring consistent blade engagement.

Fitment & Compatibility

Check these before buying:

• Model fit: Compatible with John Deere 102, 105, 115, 125, D105, D110, D140, D150, D155, D160, LA145, LA155, LA165, X140, X165, L2048, L2548. Also fits select 100 and X300 series with 42–54-inch decks.
• OEM cross: Replaces GY22172, GY20629, GY20067, GY20110. Compare your old pulley’s part number.
• Measurements: Outer diameter 4.0 in, inner bearing hole 0.5 in, overall height 1.0 in. Verify these match your deck’s pulley mount.
• Deck size: Use on 42-inch (D105, LA145) and 48/54-inch (D140, L2548) decks. Not for 38-inch or 60-inch decks.

Key Things to Know

• Quality: Metal pulley with sealed ball bearing. Some users report bearing noise after a season; inspect after heavy use.
• Installation: Direct bolt-on. You’ll need a socket and wrench to remove/replace the center bolt. No special tools required.
• 2-pack value: Comes as a pair—good if both pulleys are worn or for a spare. Single pulleys cost ~$12–15 each.
• Common gotcha: Make sure the belt is routed correctly after replacement. A misrouted belt can cause premature wear or slipping.

Should You Buy It

If you need a budget-friendly replacement for a worn idler pulley on a compatible John Deere lawn tractor, this 2-pack is a solid choice for DIY maintenance. It’s best for occasional residential mowing—not for heavy commercial use where premium bearings may last longer.