3 Pack 131494 Idler Pulley Craftsman Replaces 165888 Idler Pulley Craftsman Pulley Idler Flat 165888, 165888, 532165888, 532173437, 173437 Pulley, 532173438 Idler Pulley Craftsman, 597025001

What It Is

This 3-pack of idler pulleys (Craftsman part 131494, replacing 165888 and others) routes and tensions the drive belt on Craftsman lawn tractors and zero-turn mowers, keeping the blade or drive system engaged smoothly. It’s a common wear item for residential mowing decks from 42 to 54 inches.

Fitment & Compatibility

Before buying, check your mower’s model number (e.g., 917.xxxxx) and deck size. This pulley fits many Craftsman, Husqvarna, and Poulan Pro tractors with 42", 46", 48", 50", or 54" decks from the 2000s onward. Measure your old pulley: outer diameter should be 4.00", bore diameter 0.625" (5/8"), and width 0.75". It replaces OEM part numbers 131494, 165888, 532165888, 532173437, 173437, 532173438, and 597025001. Verify belt routing and deck spindle spacing—these pulleys are not universal for all brands (e.g., John Deere, MTD). If your deck uses a different belt path or a spring-loaded tensioner, this may not fit.

Key Things to Know

• Quality vs. OEM: This 3-pack is aftermarket, typically with metal construction and sealed bearings. It’s a solid value, but bearing life may be shorter than genuine Craftsman parts under heavy use.
• Installation: Moderate difficulty—requires removing the deck or belt guard, a socket set, and possibly a puller for stuck pulleys. Expect 30–60 minutes per pulley.
• Common gotchas: Check for deck damage or bent spindles before replacing pulleys—worn bearings often result from misalignment. Also, the 3-pack may include pulleys that differ slightly in finish (painted vs. bare metal), but dimensions match.
• Belt compatibility: Ensure your belt is routed correctly over the new pulley’s flat face—this is a flat idler, not a grooved one. Using it on a grooved belt path will cause slipping and rapid wear.

Should You Buy It

If you’re maintaining a Craftsman or compatible lawn tractor and need a cost-effective replacement for worn idler pulleys, this 3-pack saves money over buying singles. It’s ideal for DIYers with moderate mechanical skills who want to keep a spare on hand. Avoid if your mower uses a different bore size, or if you need heavy-duty commercial-grade parts—OEM or premium aftermarket pulleys last longer under frequent, rough use.