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 (3 Pack)

What It Is

This is a three-pack of aftermarket idler pulleys (model GY22172) designed to replace worn or seized pulleys on the mower deck belt drive system. They keep belt tension correct for consistent blade engagement on select John Deere lawn tractors and zero-turn mowers.

Fitment & Compatibility

Check your mower deck model first. These pulleys fit John Deere models with 42-inch (L2048, L2548) and 48-inch decks, specifically the 100, D100, LA100, X100, and select 200 series. Compatible models include: 102, 105, 115, 125, D105, D110, D140, D150, D155, D160, LA145, LA155, LA165, X140, X165, L2048, L2548. They replace OEM part numbers GY20629, GY20067, GY20110, and GY22172. Measure your original pulley’s outside diameter (approx. 4 inches) and shaft bore size (typically 5/8-inch or 3/4-inch) to confirm fit. Not for older 300/400 series or commercial decks.

Key Things to Know

• Quality vs OEM: ILONPA pulleys are steel with sealed bearings—good for residential use. They may be slightly noisier than OEM but cost ~$8 per pulley vs. $20+ each for John Deere parts.
• Installation difficulty: Moderate. You’ll need a socket set, possibly a puller if the old pulley is seized. No special tools required, but belt routing diagrams help.
• Common gotcha: The 3-pack includes pulleys for both spindle and idler positions—verify you need three pulleys total. Some decks only use two idlers; the third can be a spare.
• Belt compatibility: Works with standard John Deere deck belts (e.g., GY20864 or GY21183). Check your belt width—these pulleys are 3/8-inch wide.

Should You Buy It

Buy this if you own one of the listed John Deere models and need to replace multiple idler pulleys at once (they often wear together). It’s a solid value for DIY homeowners who want to avoid dealer prices and don’t mind slightly higher noise levels. Skip it if you need a single pulley, prefer OEM exact-match fit, or have a commercial-grade mower.