Best Seller 109-9023 135-5777-SL Deck Belt - 72" Exmark Lazer Z X/Next Lazer Z - 219"
109-9023 replacement deck belt for Exmark zero-turn mowers in branded retail packaging.
BlueStars 109-9023 lawn mower deck belt specifications chart showing 5/8 inch width and 219 inch length.
Replacement mower deck belt 109-9023 for Exmark Lazer Z mowers with 72-inch deck.
Instructional guide for identifying the correct 109-9023 lawn mower deck belt and verifying compatibility.
BlueStars 109-9023 lawn mower deck belt replacement guide with compatibility chart for Exmark Lazer Z mowers.
Infographic showing BlueStars premium aramid mower belt construction with chloroprene rubber and fiber cord details.
BlueStars replacement lawn mower drive belt shown with a zero-turn mower to illustrate common repair symptoms.
BlueStars 109-9023 replacement mower belt showing performance comparison features and aramid cord construction.
BlueStars 109-9023 replacement belt installation guide showing pulley inspection tips.
Replacement mower deck belt shown with easy installation instructions for zero-turn lawn mowers.
109-9023 replacement deck belt for Exmark zero-turn mowers in branded retail packaging.
BlueStars 109-9023 lawn mower deck belt specifications chart showing 5/8 inch width and 219 inch length.
Replacement mower deck belt 109-9023 for Exmark Lazer Z mowers with 72-inch deck.
Instructional guide for identifying the correct 109-9023 lawn mower deck belt and verifying compatibility.
BlueStars 109-9023 lawn mower deck belt replacement guide with compatibility chart for Exmark Lazer Z mowers.
Infographic showing BlueStars premium aramid mower belt construction with chloroprene rubber and fiber cord details.
BlueStars replacement lawn mower drive belt shown with a zero-turn mower to illustrate common repair symptoms.
BlueStars 109-9023 replacement mower belt showing performance comparison features and aramid cord construction.
BlueStars 109-9023 replacement belt installation guide showing pulley inspection tips.
Replacement mower deck belt shown with easy installation instructions for zero-turn lawn mowers.

109-9023 135-5777-SL Deck Belt - 72" Exmark Lazer Z X/Next Lazer Z - 219"

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$43.19
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$43.19
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109-9023 Deck Belt | 219"

Key Features

  • Heavy-duty construction for high-torque lawn mower applications.
  • Heat and oil-resistant synthetic rubber compound.
  • High-strength tensile cords designed to minimize belt stretch.
  • Outer wrap fabric provides increased durability and reduced slippage.
  • Dimensions: 5/8 inch width x 219.25 inch effective length.

Replaces / Cross-Reference Part Numbers

  • 109-9023
  • 1099023
  • 109-9023-SL
  • 135-5777
  • 135-5777-SL
  • 14366
  • 265-166
  • B11099023
  • P-1099023
  • 810-CBL2489T

Compatibility & Fitment

  • Fits Exmark Lazer Z X-Series zero-turn mowers with 72-inch cutting decks.
  • Fits Exmark Next Lazer Z series zero-turn mowers with 72-inch cutting decks.
  • Verify deck size and part number against your owner's manual before purchase.

When to Replace

  • Visible fraying, cracks, or chunking along the belt edges.
  • Excessive slippage or squealing during deck engagement.
  • Significant thinning or elongation that prevents proper tensioning.
  • Evidence of hardening or glazing due to prolonged heat exposure.

Installation Tips

  • Lower the mower deck to the lowest position to improve access to pulleys.
  • Remove the belt shields/covers to clear debris and provide enough space for routing.
  • Release tension on the idler pulley assembly using a breaker bar or socket wrench.
  • Verify that the belt is correctly seated in all pulley grooves before applying full tension.
  • Cycle the deck engagement once and re-check tension to ensure the belt has seated properly.
109-9023 135-5777-SL Deck Belt - 72" Exmark Lazer Z X/Next Lazer Z - 219" 1
109-9023 135-5777-SL Deck Belt - 72" Exmark Lazer Z X/Next Lazer Z - 219" 2
109-9023 135-5777-SL Deck Belt - 72" Exmark Lazer Z X/Next Lazer Z - 219" 3
109-9023 135-5777-SL Deck Belt - 72" Exmark Lazer Z X/Next Lazer Z - 219" 4

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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FAQs

This belt is designed for Exmark Lazer Z, Next Lazer Z, and Lazer Z AS series mowers equipped with a 72-inch deck. It is compatible with various configurations, including air-cooled and propane models, specifically those with serial numbers 790,000 and higher.
This belt replaces Exmark and Toro OEM part numbers 109-9023, 135-5777, and 135-5777-SL. It also cross-references with Stens part number 265-166.
This is a heavy-duty V-belt measuring 5/8 inch in width and approximately 219 inches in length. It features aramid (Kevlar) cord construction, which provides superior resistance to stretching, heat, and the high-torque demands of a 72-inch mowing deck.
You should inspect your belt if you notice uneven cut quality, excessive vibration, or a squealing noise while the deck is engaged. Visible signs of wear include fraying edges, cracks along the inner V-groove, glazing (a shiny, hardened appearance), or if the belt has stretched to the point where the tensioner can no longer maintain proper grip.
Before installing the new belt, inspect all deck pulleys and the tensioner arm for smooth rotation and debris buildup. Ensure the tensioner spring is not fatigued, as a weak spring will cause the new belt to slip and fail prematurely. It is also a good practice to clean the pulley grooves of any dried grass or grease to ensure maximum surface contact.