The John Deere X120 deck belt part number found is M144202. The deck belt size found is 103 in (2,616 mm) long by 0.5 in (13 mm) wide. The drive belt part number found is GX20006.
John Deere X120 Belt Size and Part Numbers
| Mower deck belt part number | M144202 |
|---|---|
| Mower deck belt length | 103 in (2,616 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
| Drive belt part number | GX20006 |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere X120 Belt Notes
| Mower deck belt note | The John Deere X120 deck belt listing shows part number M144202, length 103 in (2,616 mm) and width 0.5 in (13 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Drive belt note | The John Deere X120 drive or transmission belt part number captured here is GX20006. Do not mix it up with the deck belt because the routing and job are different |
| Fitment note | For the John Deere X120, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or belt label before spending money |
John Deere X120 Belt Size FAQ
What should you watch when fitting a 103 in (2,616 mm) deck belt on the John Deere X120?
A 103 in (2,616 mm) deck belt leaves little room for sloppy routing. This is a longer mower belt run, so twist, idler alignment and the belt keeper positions matter. A belt can be the right length and still fail if it is routed wrong. Before blaming the new belt, compare the belt path to the routing decal and make sure it sits on the correct side of each.
Why does 0.5 in (13 mm) belt width matter on the John Deere X120?
The captured deck belt width is 0.5 in (13 mm). Pulley grooves are cut for a matching belt profile. Wrong width can cause squeal, heat, poor blade speed or fast belt wear
How do you avoid mixing up the John Deere X120 deck and drive belts?
Use the belt position first: deck belt part number M144202 and drive belt part number GX20006. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
Is the captured John Deere X120 drive belt part number enough to buy from?
The captured drive belt number is GX20006. That is useful for OEM lookup, but the drive belt length and width were not fully captured here. It is weak data for guessing an aftermarket belt by size alone
Mistakes do happen. Belt specs can change by year, mower deck, pulley layout, serial range and regional parts catalog. Please check the operator manual, belt routing decal, old belt label and official John Deere parts catalog before ordering a replacement belt.
