Garden Parts [Lifetime Warranty] 954-05078 Deck Belt Replacement for Cub Cadet 50-inch Deck ZT1 50 RZT 490-501-C070 Troy Bilt Mustang 754-05078 490-501-M070 Craftsman Z550 Z5600 Zero-Turn Mowers | 5/8" x 143.5"
954-05078 replacement deck belt for 50-inch zero-turn mowers in BlueStars branded packaging.
Specification chart for 954-05078 deck belt showing dimensions, material, and compatibility for zero-turn mowers.
Compatibility chart for 954-05078 deck belt showing fit models for Cub Cadet, Troy Bilt, and Craftsman mowers.
Infographic guide for identifying the correct 954-05078 deck belt for zero-turn lawn mowers.
Informational chart for 954-05078 deck belt compatibility with Cub Cadet, Troy Bilt, and Craftsman zero-turn mowers.
Infographic showing 954-05078 mower deck belt construction with aramid fiber cords and chloroprene rubber details.
954-05078 replacement deck belt for zero-turn mowers shown with lawn mower troubleshooting guide.
BlueStars 954-05078 replacement deck belt for 50-inch zero-turn mowers showing performance comparison infographic.
Informational graphic for 954-05078 deck belt installation tips and pulley maintenance checklist.
954-05078 replacement deck belt for zero-turn mowers with easy installation instructions graphic.
954-05078 replacement deck belt for 50-inch zero-turn mowers in BlueStars branded packaging.
Specification chart for 954-05078 deck belt showing dimensions, material, and compatibility for zero-turn mowers.
Compatibility chart for 954-05078 deck belt showing fit models for Cub Cadet, Troy Bilt, and Craftsman mowers.
Infographic guide for identifying the correct 954-05078 deck belt for zero-turn lawn mowers.
Informational chart for 954-05078 deck belt compatibility with Cub Cadet, Troy Bilt, and Craftsman zero-turn mowers.
Infographic showing 954-05078 mower deck belt construction with aramid fiber cords and chloroprene rubber details.
954-05078 replacement deck belt for zero-turn mowers shown with lawn mower troubleshooting guide.
BlueStars 954-05078 replacement deck belt for 50-inch zero-turn mowers showing performance comparison infographic.
Informational graphic for 954-05078 deck belt installation tips and pulley maintenance checklist.
954-05078 replacement deck belt for zero-turn mowers with easy installation instructions graphic.
Lifetime Warranty

[Lifetime Warranty] 954-05078 Deck Belt Replacement for Cub Cadet 50-inch Deck ZT1 50 RZT 490-501-C070 Troy Bilt Mustang 754-05078 490-501-M070 Craftsman Z550 Z5600 Zero-Turn Mowers | 5/8" x 143.5"

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954-05078 Deck Belt Replacement (5/8" x 143.5")

Key Features

  • Application: Mower Deck Drive Belt
  • Type: V-Belt
  • Width: 5/8 in (0.625 in)
  • Outside Length: 143.5 in
  • Material: Engineered for durability and consistent power transfer to the mower blades.

Replaces / Cross-Reference Part Numbers

  • 954-05078
  • 754-05078
  • 490-501-C070
  • 490-501-M070
  • CMXGZAM501083
  • 266-247

Compatibility & Fitment

  • Designed for specific 50-inch deck zero-turn mowers.
  • Cub Cadet Models:
    • Ultima Series: ZT1-50, ZT1-50 KH, ZT1-50 KW, ZT2-50 KW
    • RZT Series: RZT-L50, RZT-L50 KH, RZT-S50, RZT 50
  • Troy-Bilt Models:
    • Mustang XP 50
    • Mustang Z50
  • Craftsman Models:
    • Z550
    • Z5600
    • Z5650
    • ZS6700

When to Replace

  • Visible signs of wear such as cracking, glazing, fraying, or separation.
  • Audible squealing or slipping during mower deck operation.
  • Noticeable decrease in blade speed or cutting performance.
  • Belt becomes stretched, loose, or fails to stay on pulleys.
  • Uneven or poor quality of cut.

Installation Tips

  • Before installation, disconnect the spark plug wire and engage the parking brake for safety.
  • Refer to your mower's owner's manual for the specific belt routing diagram and replacement procedure.
  • Ensure all pulleys are clean, free from debris, and spin without obstruction.
  • Inspect pulleys for damage or excessive wear and replace if necessary.
  • Confirm proper belt tension after installation according to manufacturer specifications.
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  • PART NUMBERS

    PART NUMBERS

    This Belt replaces: MTD / Troy Blit / Cub Cadet 954-05078, 754-05078, 490-501-C070, 490-501-M070, CMXGZAM501083; Husqvarna 574845603; Exmark 1-413308
  • SAVING SOLUTION

    SAVING SOLUTION

    Enjoy the great feeling when your mower is repaired and works like before - BlueStars brings DIY solutions to help you deal with any trouble
  • FIX MOWER'S SYMPTOMS

    FIX MOWER'S SYMPTOMS

    Uneven Grass Cutting, Loud or Unusual Noises, Excessive Vibration, Burning Smell, Slipping or Stalling Blades
  • IMPORTANT NOTE

    IMPORTANT NOTE

    This is a replacement part designed to be compatible with certain appliances. Any brand names mentioned are used solely to indicate compatibility.
CHECK BEFORE INSTALLING

CHECK BEFORE INSTALLING

Pulley Bearings: Make sure they spin freely, as damaged bearings can increase friction and wear | Pulleys Edges: Rust or sharp edges can cause belt damage | Pulley Grooves: Clean debris from the pulley grooves | Tensioner Spring: A weak spring can lead to belt slippage and increased friction
4 SIMPLE STEPS

4 SIMPLE STEPS

1. Remove key & disconnect spark plug wire(s) to prevent start; let engine cool | 2. Raise & secure deck, remove belt covers | 3. Release tension, remove old belt (note/take photos of routing) | 4. Install new belt, rotate blades/spindle to check alignment & operation.
Brand Model Number
NOTE Please use "Ctrl + F" on desktop or the "Find in Page" function (via Rufus) on mobile to quickly check your compatible model. (This is not an exhaustive list. You can send us your appliance model and we will help you!)
Cub Cadet Ultima 50" Deck ZT1-50 KW FAB (17AIEACL010, 17TIEACLA10, 17RIEACZ010, 17RIEACL010, 17AIEACZ010, 17AIEACLA10), ZT1-50 KH FAB (17AREACLA10), ZT2-50 KW FAB (17RIEACO010, 17RIEAC2010, 17AIEAC2A10, 17AIEAC2010, 17TIEAC2010), ZTS1-50 KH FAB (17ARGBYLA10), ZTS2-50 KH FAB (17ASGGY2A10) Ultima Zero-Turn Mowers
Troy-Bilt 50" Zero-Turn Mowers Mustang 50" Z50 (17ARFACQA66, 17ARFACQ066, 17AAFACQ066), Mustang XP 50" (17ARCACQ211, 17ARCACQ011, 17ANCACZ066, 17AKCACZ066), RZT-S50 (17WRCBDQ010, 17ARCBDQ010), RZT-S50 KH (17WRCBDQ010, 17ARCBDQ056, 17ARCBDQ010), RZT-L50 KH (17BRCACQ056, 17ARCACQ056, 17ARCACQ010), RZT-SX 50 KH FAB (17RRCBYZ010, 17ARCBYZ056), RZT-SX 50 EFI FAB (17RWCBYZ010, 17AWCBYZ010), RZT-LX 50 KW FAB (17RICAXZ010, 17AICAXZ010) Zero-Turn Mowers
Craftsman Z550 (17ADFACQ093), Z5600 (17ARFACQ093), Z5650 (7ARFACQ091), ZS6700 (247.204100 17ARCBDQ099)
Columbia Zero-Turn Mowers CZTL50 (17ADFACQ897), ZT-L50 KH (17BRCACQ897), ZT-L50 KH FAB (17ARCACZ897) Zero-Turn Mowers
Husqvarna Lawn Tractors (52" Series) GT 52XLS, GT 48XLSI, GTH 2752TF, GTH 24V52LS, GTH 26V52LS, GTH 3052TDF, GTH 3052TF, GTH 52XLS, TS 352 series Lawn Tractors

FAQ

This belt fits 50-inch deck zero-turn mowers from Cub Cadet, Troy-Bilt, Craftsman, and MTD. Compatible models include Cub Cadet RZT-L50, RZT-L50 KH, RZT-S50, RZT-S50 KH, RZT-LX 50 KW, RZT-SX 50 EFI, ZT1-50, ZT1-50 KW, ZT1-50 KH, ZT2-50, and ZT2-50 KW; Troy-Bilt Mustang 50 XP; and Craftsman Z550, Z5600, Z5650, ZS6700, ZTS1-50 Fab, and ZTS2-50 Fab. Because zero-turn decks can vary by serial range, match the belt part number from your mower's model/serial tag before ordering.
This belt replaces OEM part numbers 954-05078, 754-05078, 490-501-C070, 490-501-M070, CMXGZAM501083, 954-05078A, and 754-05078A. Always verify the exact part number originally fitted to your mower.
This is a PTO/deck belt for 50-inch decks measuring approximately 5/8 inch by 143.5 inches. The top width is approximately .656 inch, which is standard for the 5/8-inch class used on these mower decks.
Common signs include the blades not engaging, weak or uneven cutting, a squealing belt noise when the PTO is turned on, visible cracking or glazing, belt fraying, or the belt repeatedly jumping off the pulleys. On zero-turn 50-inch decks, a worn deck belt can also cause poor discharge and uncut strips because blade speed drops under load.
For most 50-inch zero-turn decks, this is a moderate repair. Expect to spend about 30 to 90 minutes depending on deck access and whether you choose to remove the deck. Common tools required include socket wrenches, a breaker bar or ratchet for spring-tension idlers, work gloves, and a phone to photograph the belt routing before removal. If the old belt came off shredded, inspect every pulley groove before installing the new one.
Inspect the idler pulleys for rough bearings, check that the tension arm moves freely, and ensure the spindle pulleys are not bent or packed with grass. Also, verify that the belt guides are not bent into the belt path. A new belt can fail early if a pulley bearing is seized, the deck is packed with debris, or the belt is routed incorrectly around the PTO and idlers.
The most common causes are heat buildup from slipping, weak spring tension, worn idler bearings, misaligned pulleys, and debris packed around the deck. Mowing tall or wet grass regularly can overload the belt, and engaging the PTO at full engine speed can increase shock load. If you are replacing the belt frequently, the problem is often elsewhere in the deck drive system rather than the belt itself.