The John Deere F912 deck belt part number found is GX20072. The deck belt size found is 124.6 in (3,165 mm) long by 0.5 in (13 mm) wide.
John Deere F912 Belt Size and Part Numbers
| Mower deck belt part number | GX20072 |
|---|---|
| Mower deck belt length | 124.6 in (3,165 mm) |
| Mower deck belt width | 0.5 in (13 mm) |
Belt Size Comparison Chart
Belt length comparison
Belt width comparison
John Deere F912 Belt Notes
| Mower deck belt note | The John Deere F912 deck belt listing shows part number GX20072, length 124.6 in (3,165 mm) and width 0.5 in (13 mm). Match the old belt, deck size and routing before spending money |
|---|---|
| Fitment note | Before ordering a John Deere F912 belt, compare the old belt routing, pulley layout and deck size if available. A close-looking belt can still be wrong |
John Deere F912 Belt Size FAQ
What should you watch when fitting a 124.6 in (3,165 mm) deck belt on the John Deere F912?
A 124.6 in (3,165 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.
Why does 0.5 in (13 mm) belt width matter on the John Deere F912?
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
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.
