127783 V-Idler Pulley Deck Drive for Craftsman Husqvarna 532127783 139245 532139245 CT130, CT131, CT135, CT141 GT200 GT160 LT120 LT1538 YTH2042 YTH1746 YTH2448 (1 Pack)

What It Is

The 127783 V-Idler Pulley is a deck drive component that tensions the mower belt on select Craftsman and Husqvarna lawn tractors. It’s a plastic idler pulley with a metal bearing, designed to reduce vibration and keep the blade belt engaged during cutting.

Fitment & Compatibility

Before buying, verify your mower’s model number (not just the deck size) against the list: CT130, CT131, CT135, CT141, GT200, GT160, LT120, LT1538, YTH2042, YTH1746, YTH2448. This pulley replaces OEM part numbers 532127783, 127783, 139245, and 532139245. Measure the pulley’s outside diameter (3.5 inches) and bore size (0.5 inch) to match your original. Avoid assuming all 42-inch or 46-inch decks use this pulley—double-check your model’s deck diagram.

Key Things to Know

• Quality concerns: At $13.99, this is a budget aftermarket part. Some users report the plastic housing cracks under heavy use or the bearing wears out faster than OEM. Expect 1–2 seasons of moderate use.
• Installation difficulty: Easy—remove the old pulley’s bolt, swap the pulley, and re-torque to 20–25 ft-lbs. No special tools needed, but a socket wrench and a 5/8-inch socket are required.
• Common gotcha: The pulley may fit loosely on some spindles if the original was metal. Check for wobble after tightening; if present, add a washer or return the part.
• Bearing noise: A slight rattle at idle is normal for this grade, but loud grinding means immediate replacement.

Should You Buy It

Buy this if you need a quick, cheap fix for a worn or broken idler pulley on a listed Craftsman/Husqvarna model and don’t mind replacing it again in a year or two. It’s a decent value for light residential use, but for heavy mowing or commercial duty, spend more on a metal OEM pulley.