[Lifetime Warranty] GY22172 Flat Idler Pulley - Compatible with John Deere L120 L130 2002 2003 2004 GY20996 GY20050 GX20305 Lawn Tractors with 42" 48" Deck - Replaces GY22172 GY20067 280-085 - Pack of 2
Set of two GY22172 flat idler pulleys for John Deere lawn tractor mower decks.
Single GY22172 flat idler pulley for John Deere lawn tractor mower decks.
Dimensional diagram of GY22172 flat idler pulley for John Deere lawn tractor mower decks.
Close-up detail of GY22172 flat idler pulley showing steel construction, sealed bearing, and zinc-coated finish.
GY22172 flat idler pulley for John Deere lawn mowers shown with repair symptoms infographic.
Instructional graphic showing 5-minute installation steps for GY22172 flat idler pulley on a John Deere lawn tractor.
Flat idler pulley replacement part for Craftsman, Husqvarna, and AYP lawn mower decks.
Compatibility chart for GY22172 flat idler pulley listing Husqvarna and Poulan lawn tractor models.
Compatibility chart for GY22172 flat idler pulley listing Poulan, Craftsman, and Weed Eater lawn tractor models.
Set of two GY22172 flat idler pulleys for John Deere lawn tractor mower decks.
Single GY22172 flat idler pulley for John Deere lawn tractor mower decks.
Dimensional diagram of GY22172 flat idler pulley for John Deere lawn tractor mower decks.
Close-up detail of GY22172 flat idler pulley showing steel construction, sealed bearing, and zinc-coated finish.
GY22172 flat idler pulley for John Deere lawn mowers shown with repair symptoms infographic.
Instructional graphic showing 5-minute installation steps for GY22172 flat idler pulley on a John Deere lawn tractor.
Flat idler pulley replacement part for Craftsman, Husqvarna, and AYP lawn mower decks.
Compatibility chart for GY22172 flat idler pulley listing Husqvarna and Poulan lawn tractor models.
Compatibility chart for GY22172 flat idler pulley listing Poulan, Craftsman, and Weed Eater lawn tractor models.
Lifetime Warranty

[Lifetime Warranty] GY22172 Flat Idler Pulley - Compatible with John Deere L120 L130 2002 2003 2004 GY20996 GY20050 GX20305 Lawn Tractors with 42" 48" Deck - Replaces GY22172 GY20067 280-085 - Pack of 2

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2 Pcs 173437 532173437 Flat Idler Pulley

Key Features

  • Package contains: 2 flat idler pulleys
  • Durable steel construction for longevity
  • Maintains proper tension on the mower deck belt
  • Inside Diameter: 3/8 inch
  • Outside Diameter: 3-5/8 inch
  • Height: 1-1/8 inch

Replaces / Cross-Reference Part Numbers

  • AYP / Roper / Sears: 165888, 173437, 532165888, 532173437
  • Husqvarna: 532 16 58-88, 532 17 34-37
  • John Deere: AM103287
  • Oregon: 78-021
  • Stens: 280-022

Compatibility & Fitment

  • Fits many 42-inch mower decks manufactured from 2000 onwards
  • Compatible with models from brands including Husqvarna, Poulan, Poulan Pro, Roper, Sears, and Craftsman

When to Replace

  • Pulley is seized, wobbles, or does not spin freely
  • Excessive noise (squealing or grinding) during mower operation
  • Visible damage such as cracks, chips, or a warped surface
  • Frequent belt slippage or derailing

Installation Tips

  • Before starting, disconnect the spark plug wire and engage the parking brake for safety.
  • Take a photo or make a diagram of the current belt routing for reference.
  • Release tension from the deck belt before removing the old pulley.
  • Ensure the new pulley is correctly aligned with the belt path before applying tension.
  • Confirm the mounting bolt is torqued to the manufacturer's specification.
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  • EXACT REPLACEMENT

    EXACT REPLACEMENT

    532173437 Idler Pulley is compatible with Craftsman, Husqvarna, Oregon, AYP, Poulan with many models
  • PREMIUM QUALITY

    PREMIUM QUALITY

    BlueStars's Lawn Mower Idler Pulley is constructed from top-grade materials, including durable metals and oxide coating for reduced corrosion
  • SAVING SOLUTION

    SAVING SOLUTION

    Enjoy the great feeling when your engine is repaired and works properly like before - BlueStars brings DIY solutions to help you deal with any trouble
  • SIMPLE INSTALLATION

    SIMPLE INSTALLATION

    The installation of idler pulley just takes a few minutes and will save you at least a hundred bucks in labor
RUGGED BUILT FOR LONG-LASTING DURABILITY

RUGGED BUILT FOR LONG-LASTING DURABILITY

BlueStars Idler Pulley's sturdy appearance and construction ensure long-lasting durability
MAXIMUM PERFORMANCE

MAXIMUM PERFORMANCE

532173437 Idler Pulleys (2 Packs) are the best replacement parts for your lawnmower with the highest level of precision
FRESH GARDEN, MEMORABLE MOMENTS!

FRESH GARDEN, MEMORABLE MOMENTS!

FAQ

This pulley is compatible with a wide range of John Deere lawn tractors, including the L100, L110, L111, L118, L120, L130, LA100, LA105, LA110, LA115, LA120, LA125, LA130, LA135, LA140, LA145, LA155, LA165, D100, D105, D110, D120, D125, D130, D140, D150, D155, D160, S100, S110, S120, S130, S140, S160, S170, S220, S240, X105, X106, X107, X110, X120, X125, X126, X127, X140, X145, X165, X166, and X167 series, as well as various Scotts models like the L2048 and L2548.
This part replaces OEM numbers GY22172 and GY20067. It also cross-references with GY20996, GY20050, GX20305, and 280-085.
Common symptoms of a failing idler pulley include a high-pitched squealing or grinding noise while the mower deck is engaged, excessive vibration, or the mower belt frequently slipping or jumping off the pulleys. If you notice the pulley wobbling on its shaft or feel resistance/grittiness when spinning it by hand, the bearings are likely worn and the unit should be replaced.
Whenever you replace an idler pulley, it is best practice to inspect your mower belt for cracks, glazing, or stretching. If the belt shows signs of wear, replace it at the same time to ensure proper tension and prevent premature failure of the new pulley. Additionally, clean any debris or grass buildup from the deck area before installing the new parts.
Replacing the idler pulley is a straightforward task that typically takes 30 to 60 minutes. You will generally need a socket set and a wrench to remove the deck belt tension. It is helpful to take a photo of the belt routing before removal to ensure you can reinstall the belt correctly afterward. Always ensure the engine is off and the spark plug wire is disconnected for safety before beginning work.