144200 Mower Deck Drive Belt 1/2" x 88" for AYP Craftsman 144200 419271 Husqvarna 531007562 532131290 532144200 Simplicity 1721130 MTD 754-0291A 754-0443, for 532178138 126520X 105380X 121979X

What It Is

This is a replacement mower deck drive belt (1/2" wide x 88" long) that transfers power from the engine pulley to the blade spindles on 42-46 inch cutting decks. It’s designed for AYP (American Yard Products) Craftsman, Husqvarna, Simplicity, and MTD lawn tractors with a 7/16" top width belt profile.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: This belt fits 42" to 46" decks (not 48"+). Measure your old belt’s length end-to-end—it must be exactly 88 inches.
• Cross-reference: Compatible with OEM part numbers: AYP/Craftsman 144200, 419271, 532144200; Husqvarna 531007562, 532131290; Simplicity 1721130; MTD 754-0291A, 754-0443. Also replaces 532178138, 126520X, 105380X, 121979X.
• Belt width: The belt is 1/2" wide (top width). Measure your old belt’s width—if it’s 3/8" or 5/8", this won’t fit. Check your deck’s pulley groove depth; a 1/2" belt needs a matching groove.

Pro tip: If your mower has a 42" deck with a single blade spindle, this belt won’t work—it’s for dual-spindle (two-blade) decks.

Key Things to Know

• Quality: Aftermarket belt (likely a Kevlar/cogged type). 4.6 stars from 290 reviews suggests good durability, but some users report slight stretch after 20-30 hours—re-tension after first use.
• Installation: Moderate difficulty. You’ll need to remove the deck, route the belt around pulleys (including a tensioner), and release tension with a breaker bar or wrench. Watch a video for your specific model—routing varies by deck.
• Common gotcha: The belt may seem too tight or too loose if your tensioner spring is worn. Replace the spring if the belt slips under load.
• Not for zero-turn mowers: This is for lawn tractors with a front-engine, not zero-turn or walk-behind mowers.

Should You Buy It

If you need a direct replacement for a 1/2" x 88" deck drive belt on a 42-46" Craftsman, Husqvarna, or MTD lawn tractor, this is a solid budget pick with strong reviews. It won’t match OEM durability in heavy commercial use, but for home/residential mowing, it’s reliable and easy to find. Just double-check your old belt’s length and width before ordering.