[Grip120] 126-7443 Deck Belt | Fits 52" Deck Exmark Radius E S X Series RZE724GKC52300 RZE708GEM52300 | 163"
126-7443 green deck belt for Exmark Radius 52-inch mowers, packaged 5/8" x 163" replacement mower belt.
BlueStars 126-7443 lawn mower deck belt specifications chart showing 5/8 inch width and 163 inch outer length.
Comparison graphic showing BlueStars mower belt with 120-degree weave for superior grip versus worn, slipping standard belts.
BlueStars 126-7443 lawn mower belt performance comparison infographic showing durability and bonding strength specs.
Infographic showing 3-layer material construction of a green replacement drive belt with heat-resistant rubber and aramid cor
Green replacement mower deck belt for Exmark 126-7443 compatibility chart.
Instructional guide for identifying the correct 126-7443 deck belt for 52-inch lawn mower cutting decks.
BlueStars 126-7443 lawn mower deck belt replacement compatibility chart for Exmark Radius series mowers.
Green lawn mower deck belt shown with Exmark zero-turn mower to illustrate power transfer to blades.
Replacement green mower deck belt with easy installation instructions for Exmark zero-turn lawn mowers.
126-7443 green deck belt for Exmark Radius 52-inch mowers, packaged 5/8" x 163" replacement mower belt.
BlueStars 126-7443 lawn mower deck belt specifications chart showing 5/8 inch width and 163 inch outer length.
Comparison graphic showing BlueStars mower belt with 120-degree weave for superior grip versus worn, slipping standard belts.
BlueStars 126-7443 lawn mower belt performance comparison infographic showing durability and bonding strength specs.
Infographic showing 3-layer material construction of a green replacement drive belt with heat-resistant rubber and aramid cor
Green replacement mower deck belt for Exmark 126-7443 compatibility chart.
Instructional guide for identifying the correct 126-7443 deck belt for 52-inch lawn mower cutting decks.
BlueStars 126-7443 lawn mower deck belt replacement compatibility chart for Exmark Radius series mowers.
Green lawn mower deck belt shown with Exmark zero-turn mower to illustrate power transfer to blades.
Replacement green mower deck belt with easy installation instructions for Exmark zero-turn lawn mowers.
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[Grip120] 126-7443 Deck Belt | Fits 52" Deck Exmark Radius E S X Series RZE724GKC52300 RZE708GEM52300 | 163"

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126-7443 Deck Belt | 163"

Key Features

  • High-strength construction resistant to heat and oil.
  • Engineered for consistent tension and minimal stretch under load.
  • Designed for high-torque deck operation.
  • Wrapped cover for enhanced durability and wear resistance.
  • Dimensions: 5/8" width x 163" effective length.

Replaces / Cross-Reference Part Numbers

  • Exmark: 126-7443
  • Exmark: 126-7443-SL, 126-7443-SU

Compatibility & Fitment

  • Fits Exmark Radius E-Series: 52" Decks
  • Fits Exmark Radius S-Series: 52" Decks
  • Fits Exmark Radius X-Series: 52" Decks
  • Commonly fits models including RZE724GKC52300 and RZE708GEM52300.

When to Replace

  • Visible signs of fraying, cracking, or dry rot on the belt sidewalls.
  • Slippage occurring during heavy grass cutting or engagement.
  • Loss of tension resulting in poor blade speed or uneven cut quality.
  • Physical stretching that prevents the belt tensioner from functioning within its specified range.

Installation Tips

  • Ensure the engine is off and the spark plug wire is disconnected before service.
  • Release the deck tensioner spring completely to provide enough slack for removal.
  • Verify that all pulleys are free of debris and rotate smoothly before installing the new belt.
  • Ensure the belt is properly seated in the V-grooves of all pulleys, including the deck spindles and the electric clutch.
  • Cycle the blade engagement handle several times after installation to ensure proper belt seating.
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  • PART NUMBERS

    PART NUMBERS

    This Deck Belt replaces: Exmark 126-7443, 126-7443-SL, 126-7443-SU.
  • 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
Exmark Radius E-Series RAE708GEM52300, RZE708GEM52300, RZE724GKC52300
Exmark Radius S-Series RAS720GKC52300, RAS720CKC52300, RAS708GEM523C3, RAS691GKA523A3, RZS691GKA523A3
Exmark Radius X-Series RZX801GKA524A3, RAX691GKA524A3, RDX691GKA524A3

FAQ

This belt is designed for Exmark Radius E, S, and X-Series mowers equipped with a 52-inch cutting deck. It is compatible with specific models including RZE724GKC52300, RZE708GEM52300, RAE708GEM52300, RAS691KA523A3, and RAX691GKA524A3.
This is a 5/8" x 163" V-belt. It replaces OEM part numbers 126-7443 and 126-7443-SL.
You should inspect your belt if you notice uneven cutting, excessive vibration during deck engagement, or a burning rubber smell while mowing. Visible signs of failure include fraying along the edges, cracking on the underside (the side that contacts the pulleys), or if the belt has stretched to the point where the tensioner can no longer maintain a firm grip.
Before installing the new belt, inspect all deck pulleys and idlers for smooth rotation and check for debris buildup. If a pulley bearing feels gritty or has play, it should be replaced, as a seized pulley will destroy a new belt in minutes. Additionally, ensure the deck is clean of grass clippings, which can cause premature heat buildup.
Replacing the belt is a standard maintenance task that typically takes 30 to 60 minutes. You will need basic hand tools to release the tensioner—usually a long-handled ratchet or a dedicated belt tensioner tool. Always consult your owner's manual for the specific routing diagram, as improper routing will cause the belt to twist or slip immediately upon engagement.