Murray X99B Belt Size Guide - TractorCharts.com

The Murray X99B lawn tractor uses three published belt sizes: 1/2" Wide x 95 3/32" O.D. for the transmission / motion drive belt, 7/16" Wide x 45" O.D. for the 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 X99B belt size & replacement chart

OEM references, belt positions and published dimensions for this lawn tractor.

Equipment: Lawn TractorBelt applications: 3OEM references: 8Sizes listed: 3

Distinct belts3

OEM references8

Belt functions2

Published sizes3

Replacement lookup

Murray X99B belt chart

Match the belt function first, then confirm the OEM number and size.

Belt application	OEM / replacement number	Published size	Listing SKU
Transmission / motion Transmission / Motion Drive Belt	37X61, 037X61, 710531	1/2" Wide x 95 3/32" O.D.	BEL37X61
Mower deck Cutter Deck Belt	37X111, 37X111MA	7/16" Wide x 45" O.D.	BEL37X111
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 X99B belt do you need?

Transmission / Motion Drive Belt

Recorded OEM references: 37X61, 037X61, 710531. Published size: 1/2" Wide x 95 3/32" O.D.

Cutter Deck Belt

Recorded OEM references: 37X111, 37X111MA. Published size: 7/16" Wide x 45" O.D.

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 X99B belt FAQ

What belt does the Murray X99B use?

The listed belt applications are Transmission / Motion Drive Belt, Cutter Deck Belt, and Cutter Deck Belt / Secondary Belt / Blade to Blade Belt. Recorded OEM references: 37X61, 037X61, 710531, 37X111, 37X111MA, 37X66, 037X66, and 037X66MA.

What are the Murray X99B belt part numbers?

The recorded OEM references are 37X61, 037X61, 710531, 37X111, 37X111MA, 37X66, 037X66, and 037X66MA. Match each number to the correct belt position before ordering.

What belt sizes does the Murray X99B use?

Transmission / Motion Drive Belt: 1/2" Wide x 95 3/32" O.D., Cutter Deck Belt: 7/16" Wide x 45" O.D., 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 X99B?

This machine has 3 recorded belt applications. Different belts can operate the mower deck, transmission, PTO, clutch or other drive components.

Can I match the Murray X99B 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.