GX20006 Drive Belt 1/2" x 89" Replacement for John Deere 100 Series D E L LA X100 Lawn Tractors, Replaces Murray 037X81MA 37X81MA 037X88 37X88MA 710213

What It Is

This is a 1/2" wide by 89" long drive belt for John Deere 100 Series lawn tractors (D, E, L, LA, X100 models). It transfers power from the engine pulley to the mower deck blades. It also replaces several Murray/MTD belts (037X81MA, 37X81MA, 037X88, 37X88MA, 710213).

Fitment & Compatibility

• Measure your old belt first: Verify length (89") and width (1/2"). A 1/2" x 89" belt is common, but some John Deere decks use 3/8" or 92" belts.
• Check deck size: Fits 42", 46", and 48" decks on John Deere 100 Series (e.g., D100, D105, D110, D125, D130, D140, D150, D155, D160, D170; E100, E110, E120, E130, E140, E150, E160, E170; L100, L107, L108, L110, L111, L118, L120, L130; LA100, LA105, LA110, LA115, LA120, LA125, LA130, LA140, LA145, LA150, LA155, LA165, LA175; X100, X102, X104, X106, X110, X114, X120, X124, X126, X140, X145, X150, X155, X160, X165, X170, X175, X180, X185, X190, X195).
• OEM vs aftermarket: This is a non-OEM replacement. It should match OEM part numbers GX20006, GX20006, GY20006, GY21131, GY21132, GY21133, GY21134, GY21135, GY21136, GY21137, GY21138, GY21139.
• Warranty check: Using a non-OEM belt may void your deck warranty. Confirm before buying if your tractor is still under warranty.

Key Things to Know

• Quality: At $11.19, this is a budget belt. It works for light-to-moderate use but may wear faster than OEM (John Deere GY20006) on heavy or frequent mowing.
• Installation difficulty: Moderate. You’ll need to remove the mower deck, release the idler pulley spring tension, and route the belt around all pulleys. A belt routing diagram is helpful—check your owner’s manual or online.
• Common gotcha: The idler pulley spring is strong. Use a wrench or belt tool to relieve tension safely. Pinch hazard.
• Length variance: Some users report the 89" length is slightly tight on certain decks. If your old belt was exactly 89", this should fit. If it was 89.5", consider a 90" belt instead.

Should You Buy It

Buy this belt if you need a quick, inexpensive replacement for a John Deere 100 Series or compatible Murray/MTD deck, and you mow a standard lawn (not commercial or heavy