2 Pack 131494 Idler Pulley Replaces 532131494 532165888 532173437 532173438 597025001 532155191 165888 173437 173438 155191 for Craftsman 42" LT1000, Husqvarna YTH18542 LT16542 LT18542 Mowers

What It Is

This 2-pack of 131494 idler pulleys replaces the OEM part that guides and tensions the drive belt on select Craftsman and Husqvarna lawn mowers. Designed for 42-inch cutting decks, it keeps the belt aligned to prevent slipping or premature wear.

Fitment & Compatibility

Before buying, check three things:

• Deck size: Confirmed fit for 42-inch decks only (e.g., Craftsman LT1000, Husqvarna YTH18542, LT16542, LT18542). Will not work on 46- or 54-inch decks.
• Model numbers: Cross-references OEM part #532131494, 532165888, 532173437, 532173438, 597025001, 532155191. If your mower’s parts diagram lists any of these, it’s a match.
• Physical measurements: 3-inch outer diameter, 5/8-inch bore, flat flange. Measure your old pulley to confirm—some aftermarket pulleys vary slightly in thickness or bearing depth.

Note: This is an aftermarket replacement, not OEM. Quality is generally fine, but inspect the bearing smoothness before installation.

Key Things to Know

• Installation difficulty: Easy. Requires a socket or wrench to remove one bolt, swap the pulley, and re-tension the belt. No special tools needed.
• Common gotcha: The pulley may come with a protective coating or light rust. Wipe it clean and spin it by hand—if it’s gritty or stiff, return it.
• Durability: Sealed ball bearings hold up well for residential use (1-2 seasons). Not ideal for commercial mowing or heavy dust/debris conditions.
• Belt alignment: If your new pulley wobbles or the belt rides off, double-check the belt tension and deck leveling. A misaligned deck will wear any pulley faster.

Should You Buy It

If you own a 42-inch Craftsman or Husqvarna with a failing idler pulley, this 2-pack is a solid value. It’s an easy DIY fix that restores belt tension and stops squeaking or slipping. Skip it if you need OEM precision for a commercial mower or if your deck size isn’t 42 inches.