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Secondary Drive Belt

Part Number: 37X66MA
MurraySnapperBriggs and Stratton
Availability: 4 in stock
Price: $24.53
Ships within 1 business day

*This part replaces obsolete part #: 037X66MA and 720404.

Product Information
Manufacturer: Murray, Snapper, Briggs and Stratton
Product Number: 37X66MA
Classification: Part
Weight: 0.34 lbs.
Shipping: Ships Worldwide
Description:
This is a Genuine Manufacturer Approved replacement Belt used on Murray Lawn Tractors. This part is made out of Rubber and it is Sold Individually. This is the the Smaller Belt that drives Blades on your unit.

Clean pulleys before installing the new belt to ensure top performance and longevity with your new belt. Inspect belt periodically and replace it when worn or stretched to maintain peak performance.

You would need a Wrench set and Pliers to replace this belt.

• For your safety make sure to disconnect the spark plug wire.
• Fist you would need to lower the mower deck to the lowest position
• Then move the blade engagement lever to the Off position.
• Roll the belt off the engine pulley from between the belt guide and pulley.
• Remove mower deck by removing the bow-tie pins securing the left and right lift arms
• Disconnect the blade engagement cable from the mower deck
• Remove the bolts from the mower deck belt pulley covers and pull the covers off.
• Loosen but don’t remove the nuts on the top of the idler pulleys.
• Install the new mower deck belt through the belt guides and around the pulleys.
• Tighten the nuts on the top of the idler pulleys.
• Re-Assemble the Deck
Frequently Purchased With
Compatibility

This part is compatible with the following machines:

Murray
7800399 (ELT175460H) Lawn Tractor
7800400 (ELT12460H) Lawn Tractor
7800416 (EYK12460H) Lawn Tractor
7800494 (465624x108A) Lawn Tractor
7800495 (465625x108A) Lawn Tractor
7800192 (LT20460) Lawn Tractor
7800283 (465307x51) Lawn Tractor
7800306 (465624x78B) Lawn Tractor
7800311 (CLT20460) Lawn Tractor
465617x51A 46" Lawn Tractor
461004x92B 46" Lawn Tractor
461605x99A 46" Lawn Tractor
465306x8B 46" Lawn Tractor
465307x31A 46" Lawn Tractor
465600x48A 46" Lawn Tractor
465624x50A 46" Lawn Tractor
465624x78A 46" Lawn Tractor
468602x68A 46" Lawn Tractor
461004x92A 46" Lawn Tractor
461005x68A 46" Lawn Tractor
461604x99A 46" Lawn Tractor
465306x8A 46" Lawn Tractor
461000x8A 46" Lawn Tractor
461008x692A 46" Lawn Tractor
461008x92A 46" Lawn Tractor
461603x48A 46" Lawn Tractor
465600x31A (2003) 46" Lawn Tractor
465600x8A (2003) 46" Lawn Tractor
465601x50B (2003) 46" Lawn Tractor
465604x50A (2003) 46" Lawn Tractor
465605x48A (2003) 46" Lawn Tractor
465609x24A (2003) 46" Lawn Tractor
465610x99A (2003) 46" Lawn Tractor
465618x48A (2003) 46" Lawn Tractor
461001x68A (2002) 46" Lawn Tractor
461007x92B (2002) 46" Lawn Tractor
461018x99B (2002) 46" Lawn Tractor
46104x8D (2002) 46" Lawn Tractor
461000x71A (2001) 46" Lawn Tractor
461007x92A (2001) 46" Lawn Tractor
461018x99A (2001) 46" Lawn Tractor
46103x50C (2001) 46" Lawn Tractor
46104x8C (2001) 46" Lawn Tractor
465305x92A (2002) 46" Lawn Tractor
465305x92B (2002) 46" Lawn Tractor
465601x50A (2002) 46" Lawn Tractor
465602x31B (2002) 46" Lawn Tractor
465602x8D (2002) 46" Lawn Tractor
465603x92A (2002) 46" Lawn Tractor
465603x92B (2002) 46" Lawn Tractor
465616x6B (2002) 46" Lawn Tractor
465617A (2002) 46" Lawn Tractor
465621x89A (2002) 46" Lawn Tractor
465621x89B (2002) 46" Lawn Tractor
465622x99A (2002) 46" Lawn Tractor
46102x6B (2000) 46" Lawn Tractor
46107x92A (2000) 46" Lawn Tractor
46103B (2000) 46" Lawn Tractor
46108x89A (2000) 46" Lawn Tractor
46103x50B (2000) 46" Lawn Tractor
46104x14A (2000) 46" Lawn Tractor
46104x8B (2000) 46" Lawn Tractor
46106x89B (2000) 46" Lawn Tractor
46370x5C (1996) Garden Tractor
46376x65B (1996) Garden Tractor
46377x8A (1996) Garden Tractor
46378x62A (1996) Garden Tractor
46378x6A (1996) Garden Tractor
46379x192A (1996) Garden Tractor
46379x92A (1996) Garden Tractor
46400A (1996) Garden Tractor
46400x5A (1996) Garden Tractor
46400x65A (1996) Garden Tractor
46401x6A (1996) 46 Inch Cut Lawn Tractor
46404x21A (1996) 46 Inch Cut Lawn Tractor
46403x199A (1996) 46 Inch Cut Lawn Tractor
46403x30A (1996) 46 Inch Cut Lawn Tractor
46404x8A (1996) 46 Inch Cut Lawn Tractor
46403x8A (1996) 46 Inch Cut Lawn Tractor
46501x92A (2000) 46" Lawn Tractor
46577x6B (2000) 46" Lawn Tractor
46569x6C (2000) 46" Lawn Tractor
46581x92A (2000) 46" Lawn Tractor
46570x6C (2000) 46" Lawn Tractor
46570x92A (2000) 46" Lawn Tractor
46380x50B (1998) 46" Cut Garden Tractor
46401x30A (1998) 46" Cut Garden Tractor
46430x31A (1998) 46" Cut Garden Tractor
46379x71A (1998) 46" Cut Garden Tractor
46103A (1999) 46" Garden Tractor
46103x50A (1999) 46" Garden Tractor
46103x71A (1999) 46" Garden Tractor
46103x92A (1999) 46" Garden Tractor
46106x89A (1999) 46" Garden Tractor
46104x8A (1999) 46" Garden Tractor
46430x6A (1998) 46" Cut Garden Tractor
46431x92A (1998) 46" Cut Garden Tractor
46430x89A (1998) 46" Cut Garden Tractor
46430x8A (1998) 46" Cut Garden Tractor
46569x71B (1999) 46" Lawn Tractor
46102x6A (1999) 46" Lawn Tractor
46576x92A (1999) 46" Lawn Tractor
46569x82A (1999) 46" Lawn Tractor
46576x92B (1999) 46" Lawn Tractor
46500x92A (1999) 46" Lawn Tractor
46570x6B (1999) 46" Lawn Tractor
46577x4A (1999) 46" Lawn Tractor
46569x6B (1999) 46" Lawn Tractor
46570x71B (1999) 46" Lawn Tractor
46577x6A (1999) 46" Lawn Tractor
46379x30A (1998) 46" Lawn Tractor
46570x8B (1999) 46" Lawn Tractor
46577x71A (1999) 46" Lawn Tractor
46567x30A (1998) 46" Lawn Tractor
46569x71A (1998) 46" Lawn Tractor
46568x6A (1998) 46" Lawn Tractor
46569x92A (1998) 46" Lawn Tractor
46569x6A (1998) 46" Lawn Tractor
46569x9A (1998) 46" Lawn Tractor
46570x6A (1998) 46" Lawn Tractor
46570x8A (1998) 46" Lawn Tractor
46573x92A (1998) 46" Lawn Tractor
46570x71A (1998) 46" Lawn Tractor
46250x65C (1996) 46 Inch Cut Lawn Tractor
46254x15B (1996) 46 Inch Cut Lawn Tractor
46258x6A (1996) 46 Inch Cut Lawn Tractor
46250x30A (1996) 46 Inch Cut Lawn Tractor
46800B (1996) 46 Inch Cut Lawn Tractor
46804A (1996) 46 Inch Cut Lawn Tractor
46900B (1996) 46 Inch Cut Lawn Tractor
46901x192A (1996) 46 Inch Cut Lawn Tractor
46901x92B (1996) 46 Inch Cut Lawn Tractor
46906x199A (1996) 46 Inch Cut Lawn Tractor
46904x192A (1996) 46 Inch Cut Lawn Tractor
46906x199A (1996) 46 Inch Cut Lawn Tractor
46379x83A (1997) 46 Inch Cut Lawn Tractor
46378x6B (1996) 46 Inch Cut Lawn Tractor
46379x92B (1997) 46 Inch Cut Lawn Tractor
46379A (1996) 46 Inch Cut Lawn Tractor
46379x192B (1996) 46 Inch Cut Lawn Tractor
46380x50A (1997) 46 Inch Cut Lawn Tractor
46400x50A (1997) 46 Inch Cut Lawn Tractor
46404x89A (1997) 46 Inch Cut Lawn Tractor
46562x8B (1997) 46 Inch Cut Lawn Tractor
46560x92A (1997) 46 Inch Cut Lawn Tractor
46560x192A (1997) 46 Inch Cut Lawn Tractor
46562x8A (1997) 46 Inch Cut Lawn Tractor
46567x6A (1997) 46 Inch Cut Lawn Tractor
46567x6B (1997) 46 Inch Cut Lawn Tractor
46568A (1997) 46 Inch Cut Lawn Tractor
Expand the 150+ compatible machines
Products Compatibility

This item works with the following types of products:

  • • Lawn Tractor
Questions & Answers

No questions have been asked yet
Repair Instructions: Submitted by Customers Like You
3 of 3 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Secondary Drive Belt - 37X66MA
Repair Difficulty:
Hard
Time Spent Repairing:
1-2 hours
Tools Used:
Socket set, Wrench Set, Nutdriver
Secondary belt broke.
Removed the mower deck. Removed covers from belts. Pulled off primary driver belt. Replaced secondary belt, then primary driver belt. replace covers for belts and then deck.

Next time.
Replace all belts since the main belt has to be removed anyway.
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Tool Type:
Lawn Tractor
Parts Used:
Idler Pulley - 690387MA
Primary Belt - 37X89MA
Pulley, Idler, Right - 690549MA
Secondary Drive Belt - 37X66MA
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set
Old tractor, pulleys just worn out and belts needed replacing
Dropped mower deck, replaced pulleys and belts and reassembled
Did you find this story helpful?
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Tool Type:
Lawn Tractor
Parts Used:
Spring - 165X138MA
Secondary Drive Belt - 37X66MA
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Socket set, Wrench Set
One of the deck belts was cracked to the point of needing replacement and the drive belt idler pulley tension spring was broken.
My big problem was that the old idler spring was just lying on the deck and I had no idea where it went. I knew the short end hooked to the idler pulley arm but nothing else seemed like an appropriate place to hook the other end to.

This is more or less how it went:
I removed the mower deck, marking the various arms and mounting pins so I knew where everything when. I dragged the deck away from the tractor, cleaned it thoroughly, primed the bad spots, and repainted the deck with matching paint. I masked all of the decals so they still looked sharp when I pulled off the tape.

I replaced the secondary drive belt and the primary belt. Once it was roughly in place, I fooled around with the spring until I found a place that would hold it under tension and seemed far enough to stretch it.

I hooked one end to the bracket and using a tool I made of a thick piece of wood and a piece of 550 cord, I stretched the spring until I could hook the other end. (Be careful not to aim the spring at your head in the event it comes loose.) I had no problem slipping the 550 cord from behind the spring.

I double checked the operation of the spring and pushed the deck back under the tractor and placed the drive belt around the drive pulley. As I had marked the deck supporting locations, I had no trouble putting it back on the tractor.

Once the deck was back under the tractor, I leveled it while it was parked on my driveway.

I think removing the deck was the simplest thing to do; I might have been able to do everything with the deck on the tractor (I don't know) but this way everything was free and clear and I could repaint the rusty spots.
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Thanks for voting and helping fellow customers!
0 of 1 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
V-Belt, Drive - 37X106MA
Primary Belt - 37X89MA
Secondary Drive Belt - 37X66MA
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Socket set, Wrench Set
Our belts were cracked and breaking
Remove the deck
Take a picture of the belt routing and install the belts
Then install the primary belt above the chassis
Replace the deck
Did you find this story helpful?
Thanks for voting and helping fellow customers!
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  • Secondary Drive Belt
    These are very good replacement belts
    Guest - January 26, 2022 Verified Purchase
    The belt fit perfectly and was moderately easy to install
    I'm amazed at how quickly ereplacement parts responds to a need. I recently ordered 2 pulleys for my older Allis Chalmers lawn tractor. The pulleys arrived, but they were both the same. I needed one larger than the other. BINGO! They quickly located a supplier and made sure it got to me immediately. I have deleted all other parts suppliers from my laptop and will rely exclusively on ereplacementparts. They are really good - fast, efficient and totally customer oriented.
    Guest - October 21, 2020 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    Product Information
    Manufacturer: Murray, Snapper, Briggs and Stratton
    Product Number: 37X66MA
    Classification: Part
    Weight: 0.34 lbs.
    Shipping: Ships Worldwide

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