GX20072 Deck Belt for John Deere 42 inch Husqvarna Lawn Mower Parts D100 D105 D110 D120 D125 D130 E100 E110 L100 L110 Series

What It Is

This GX20072 replacement deck belt drives the mower blades on 42-inch cutting decks for select John Deere and Husqvarna lawn tractors. It’s a standard V-belt designed for residential mowing, not heavy commercial use.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 42 inches (measured blade tip to blade tip). This belt fits John Deere D100, D105, D110, D120, D125, D130, E100, E110, L100, L110 series, plus Husqvarna models that use the same GX20072 OEM part number. Cross-reference your owner’s manual or old belt part number—aftermarket belts can vary in length by a few millimeters. Measure your old belt’s length (roughly 96.5 inches for this one) and width (1/2 inch). Not compatible with 46-inch or 48-inch decks.

Key Things to Know

• Quality: At $9.99, this is a budget aftermarket belt. Expect shorter lifespan than OEM (1-2 seasons vs. 3-4 with heavy use). Check for fraying after first few hours.
• Installation: Generally straightforward—route around pulleys and use the tensioner lever to slip it on. No special tools needed, but a belt diagram helps. Take a photo before removing the old belt.
• Common gotchas: The belt may feel slightly stiff out of the box; it will loosen after a mowing session. If it squeals or slips, re-check routing and tensioner spring condition. Deck spindles must spin freely—seized spindles will shred this belt quickly.
• OEM vs aftermarket: This is not a John Deere or Husqvarna branded belt. It’s a generic replacement that meets minimum specs. If you mow heavy grass often, consider spending more for a Kevlar-reinforced belt.

Should You Buy It

Buy this if you need a quick, cheap fix for a residential mower with a 42-inch deck and you’re comfortable replacing belts every season or two. Skip it if you mow large acres, hit thick wet grass, or want OEM durability—invest in a premium aftermarket or genuine belt instead.