The Murray X6B lawn tractor uses two published belt sizes: 1/2" Wide x 80 3/8" for the engine to deck belt / primary cutter deck belt and 1/2" Wide x 47" O.D. for the cutter deck belt / secondary belt / blade to blade belt. Match each belt to its correct position and OEM reference before ordering.
Belt replacement guide
Murray X6B belt size & replacement chart
OEM references, belt positions and published dimensions for this lawn tractor.
Match the belt function first, then confirm the OEM number and size.
Belt application
OEM / replacement number
Published size
Listing SKU
Mower deck Engine to Deck Belt / Primary Cutter Deck Belt
37X69, 037X69, 037X69MA
1/2" Wide x 80 3/8"
BEL37X69
Mower deck Cutter Deck Belt / Secondary Belt / Blade to Blade Belt
37X66, 037X66, 037X66MA
1/2" Wide x 47" O.D.
BEL37X66
Application details
Which Murray X6B belt do you need?
Engine to Deck Belt / Primary Cutter Deck Belt
Recorded OEM references: 37X69, 037X69, 037X69MA. Published size: 1/2" Wide x 80 3/8"
Cutter Deck Belt / Secondary Belt / Blade to Blade Belt
Recorded OEM references: 37X66, 037X66, 037X66MA. Published size: 1/2" Wide x 47" O.D.
Important: Confirm the belt position, deck size, serial range and machine configuration before ordering. Belts with the same length can use different widths or profiles.
Common questions
Murray X6B belt FAQ
What belt does the Murray X6B use?
The listed belt applications are Engine to Deck Belt / Primary Cutter Deck Belt and Cutter Deck Belt / Secondary Belt / Blade to Blade Belt. Recorded OEM references: 37X69, 037X69, 037X69MA, 37X66, 037X66, and 037X66MA.
What are the Murray X6B belt part numbers?
The recorded OEM references are 37X69, 037X69, 037X69MA, 37X66, 037X66, and 037X66MA. Match each number to the correct belt position before ordering.
What belt sizes does the Murray X6B use?
Engine to Deck Belt / Primary Cutter Deck Belt: 1/2" Wide x 80 3/8" and Cutter Deck Belt / Secondary Belt / Blade to Blade Belt: 1/2" Wide x 47" O.D.
Why are multiple belts listed for the Murray X6B?
This machine has 2 recorded belt applications. Different belts can operate the mower deck, transmission, PTO, clutch or other drive components.
Can I match the Murray X6B belt by length alone?
No. Width, profile, inside or outside circumference, belt position and OEM reference can all affect fitment. Match the belt function and OEM number first, then use the dimensions as a final check.
