The John Deere F911 deck belt part number found is M120381. The deck belt length found is 124.6 in (3,165 mm). The drive belt part number found is AM116304.
Deck belt part #M120381
Deck belt sizelength 124.6 in (3,165 mm)
Drive belt part #AM116304
John Deere F911 Belt Size and Part Numbers
Mower deck belt part number
M120381
Mower deck belt length
124.6 in (3,165 mm)
Drive belt part number
AM116304
Belt Size Comparison Chart
Belt length comparison
This model
125 in
Average
110 in
Low
75 in
High
155 in
John Deere F911 Belt Notes
Mower deck belt note
The John Deere F911 deck belt listing shows part number M120381 with length 124.6 in (3,165 mm). Use the listed value as a buying guide, not a blind substitute for the deck-specific parts diagram
Drive belt note
The John Deere F911 drive or transmission belt part number captured here is AM116304. This is separate from the mower deck belt
Fitment note
The blunt rule with the John Deere F911: part number beats guesswork. If the belt is off by even a small amount, it can slip, squeal, jump pulleys or wear fast
John Deere F911 Belt Size FAQ
Is a close belt length good enough for the John Deere F911 deck?
The deck belt length found is 124.6 in (3,165 mm). Close is not the same as correct. A belt that is slightly short can overload bearings, while one slightly long can slip or fail to engage the blades cleanly
How do you avoid mixing up the John Deere F911 deck and drive belts?
Use the belt position first: deck belt part number M120381 and drive belt part number AM116304. A deck belt number does not automatically fit the drive system, even when an aftermarket listing makes the cross-reference look close
What should you double-check with the John Deere F911 deck belt part number?
The captured deck belt number is M120381. Because the width is missing here, check the old belt label, deck tag or parts diagram before trusting a non-OEM cross-reference
Is the captured John Deere F911 drive belt part number enough to buy from?
The captured drive belt number is AM116304. 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
Official information note
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.
