[Lifetime Warranty] 2 Pcs 173437 532173437 Flat Idler Pulley

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.