[Lifetime Warranty] 109-8073 Deck Belt Replacement for 60 inch Deck Exmark Lazer Z 135-5774-SL 135-5774 AS X E S Series Zero Turn Mower - Replaces 116-1985 146-0183 1098073 | 5/8" x 198.75"
BlueStars 109-8073 replacement deck belt for Exmark Lazer Z mowers in branded retail packaging.
Infographic showing specifications for 109-8073 replacement deck belt for Exmark Lazer Z mowers.
109-8073 replacement deck belt for 60-inch Exmark Lazer Z mowers, showing compatibility and part number reference chart.
Infographic guide for identifying the correct 109-8073 Exmark mower deck belt and checking parts labels.
Informational graphic showing 109-8073 deck belt compatibility chart for Exmark 60-inch zero turn mowers.
Infographic showing 109-8073 aramid mower deck belt features including chloroprene rubber and fiber cord construction.
109-8073 replacement deck belt for Exmark Lazer Z zero turn mower shown with troubleshooting symptoms infographic.
BlueStars 109-8073 replacement deck belt for Exmark Lazer Z mower, showing performance comparison infographic.
Infographic showing 109-8073 mower deck belt installation tips for Exmark Lazer Z zero turn mowers.
Replacement deck belt for Exmark Lazer Z mower with installation instructions and mechanic working on tractor.
BlueStars 109-8073 replacement deck belt for Exmark Lazer Z mowers in branded retail packaging.
Infographic showing specifications for 109-8073 replacement deck belt for Exmark Lazer Z mowers.
109-8073 replacement deck belt for 60-inch Exmark Lazer Z mowers, showing compatibility and part number reference chart.
Infographic guide for identifying the correct 109-8073 Exmark mower deck belt and checking parts labels.
Informational graphic showing 109-8073 deck belt compatibility chart for Exmark 60-inch zero turn mowers.
Infographic showing 109-8073 aramid mower deck belt features including chloroprene rubber and fiber cord construction.
109-8073 replacement deck belt for Exmark Lazer Z zero turn mower shown with troubleshooting symptoms infographic.
BlueStars 109-8073 replacement deck belt for Exmark Lazer Z mower, showing performance comparison infographic.
Infographic showing 109-8073 mower deck belt installation tips for Exmark Lazer Z zero turn mowers.
Replacement deck belt for Exmark Lazer Z mower with installation instructions and mechanic working on tractor.
Lifetime Warranty

[Lifetime Warranty] 109-8073 Deck Belt Replacement for 60 inch Deck Exmark Lazer Z 135-5774-SL 135-5774 AS X E S Series Zero Turn Mower - Replaces 116-1985 146-0183 1098073 | 5/8" x 198.75"

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109-8073 Deck Belt Replacement (5/8" x 198.75")

Key Features

  • Dimensions: 5/8 in. Width x 198.75 in. Outer Circumference
  • Belt Profile: 5V
  • Construction: Wrapped-molded with aramid fiber reinforcing cords
  • Material: Styrene-butadiene rubber (SBR) compound
  • Design: Double-cover for durability in clutching applications

Replaces / Cross-Reference Part Numbers

  • 135-5774
  • 135-5774-SL
  • 109-8073-SL
  • 116-1985
  • 265-164
  • 15-117
  • 810-CBL2473T
  • 14167
  • A-1098073

Compatibility & Fitment

  • Brand: Exmark
  • Model Line: Lazer Z
  • Series: Fits select AS, E, S, and X Series models
  • Deck Size: 60 inch
  • Note: Always verify the required part number from your equipment's manual before ordering.

When to Replace

  • Visible signs of wear such as cracking, fraying, glazing, or separation of layers.
  • Audible squealing or slipping during deck operation.
  • Noticeable decrease in blade speed or cutting performance.
  • Belt has stretched and can no longer be properly tensioned.

Installation Tips

  • Disconnect the spark plug wire and battery negative terminal for safety.
  • Document the old belt's routing path with a photograph or diagram.
  • Release the tensioner pulley to create slack for belt removal.
  • Route the new belt according to the manufacturer's specifications, ensuring it is centered in all pulley grooves.
  • Re-engage the tensioner and verify correct belt tension before operation.
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  • PART NUMBERS

    PART NUMBERS

    This Deck Belt replaces part numbers: 109-8073, 135-5774-SL, 135-5774, 116-1985, 146-0183
  • 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 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!)
Exmark Lazer Z AS 60 Inch LZA20KAS484 (850000 - 919999), LZA20KAX484 (850000 - 919999), LZA20KAX524 (850000 - 919999), LZA27KC604 (820000 - 919999), LZAS20BV484 (790000 - 849999), LZAS20KC484 (790000 - 849999), LZAS22KA484 (850000 - 919999), LZAS22KA484CA (850000 - 919999), LZAS23KC524 (790000 - 849999; 850000 - 919999), LZAS25KC604 (790000 - 849999; 850000 - 919999), LZAS26LKA604 (790000 - 849999; 850000 - 919999), LZAS27KC524 (790000 - 849999; 850000 - 919999), LZAS27KC524CA (850000 - 919999), LZAS27KC604 (790000 - 849999; 850000 - 919999), LZAS27KC604CA (820000 - 919999), LZAS29KA604LP (850000 - 919999), LZAS29KA724 (790000 - 849999; 850000 - 919999), LZAS29KA724LP (850000 - 919999)
Lazer Z E-Series 60 Inch LZE730GKA604A3 (315000000 - 315999999; 316000000 - 399999999), LZE730GKA604B3 (315000000 - 315999999), LZE730KA604 (313000000 - 313999999; 314000000 - 314999999), LZE730KA604SS (314000000 - 314999999), LZE740EKC604 (312000000 - 312999999; 313000000 - 313999999; 314000000 - 314999999), LZE740EKC60400 (315000000 - 315999999; 316000000 - 399999999; 400000000 - 402082299; 402082300 - 404314158), LZE740EKC604A3 (315000000 - 315999999), LZE740KC604 (312000000 - 312999999; 313000000 - 313999999), LZE740KC604L (312000000 - 312999999), LZE742GKC60400 (315000000 - 315999999), LZE742GKC60403 (315000000 - 315999999), LZE742GKC604A3 (315000000 - 315999999; 316000000 - 399999999; 400000000 - 402082299; 402082300 - 404314158), LZE742GKC604B1 (316000000 - 399999999), LZE742GKC604C1 (400000000 - 402082299), LZE742KC604 (314000000 - 314999999), LZE751CKA604A1 (400000000 - 402082299; 402082300 - 404314158), LZE751GKA604A1 (400000000 - 402082299; 402082300 - 404314158), LZE751GKA604C1 (400000000 - 402082299; 402082300 - 404314158), LZE801GKA604A3 (316000000 - 399999999), LZE801GKA604B1 (316000000 - 399999999), LZE801GKA604C1 (400000000 - 402082299)
Lazer Z S-Series 60 Inch LZS25EKC604 (920000 - 999999), LZS25KC604 (920000 - 999999), LZS27KC604 (920000 - 999999), LZS27KC604CA (920000 - 999999), LZS27KC604SS (920000 - 999999), LZS29PKA604 (920000 - 999999), LZS730EKC604 (312000000 - 312999999), LZS740KC604 (312000000 - 312999999; 313000000 - 313999999), LZS740KC604CA (312000000 - 312999999), LZS740PKC604 (313000000 - 313999999; 314000000 - 314999999), LZS740PKC60400 (315000000 - 315999999; 316000000 - 316999999; 400000000 - 402082299; 402082300 - 404314158), LZS742CKC60400 (315000000 - 315999999), LZS742KC604 (314000000 - 314999999), LZS749AKC604A1 (316000000 - 316999999; 400000000 - 402082299; 402082300 - 404314158), LZS749EKC604 (313000000 - 313999999; 314000000 - 314999999), LZS749EKC60400 (315000000 - 315999999), LZS749EKC604A1 (315000000 - 315999999), LZS749EKC604SS (312000000 - 312999999; 314000000 - 314999999), LZS801GKA60400 (315000000 - 315999999), LZS801GKA604A1 (315000000 - 315999999; 316000000 - 316999999; 400000000 - 402082299; 402082300 - 404314158; 404314159 - 406294344), LZS801KA604 (313000000 - 313999999; 314000000 - 314999999), LZS801KA604SS (312000000 - 312999999, 314000000 - 314999999), LZS801PKA604 (312000000 - 312999999), LZS850EKA604W0 (402082300 - 404314158)
Lazer Z X-Series 60 Inch LZX27KC606 (920000 - 999999), LZX27KC606CA (920000 - 999999), LZX29EKC606 (920000 - 999999), LZX29EKC606CA (920000 - 999999), LZX29EKC606SS (920000 - 999999), LZX29KA606 (920000 - 999999), LZX29KA606SS (920000 - 999999), LZX29PKA606 (920000 - 999999), LZX34KC606 (920000 - 999999), LZX34KC606SS (920000 - 999999), LZX38KC606 (920000 - 999999), LZX38KC606CA (920000 - 999999), LZX38KC606SS (920000 - 999999), LZX740KC606 (312000000 - 312999999), LZX740KC606CA (312000000 - 312999999), LZX749EKC606 (312000000 - 312999999), LZX801CKA60600 (400000000 - 402082299; 402082300 - 404314158), LZX801CKA606C1 (400000000 - 402082299; 402082300 - 404314158; 404314159 - 406294344), LZX801GKA60600 (315000000 - 315999999; 316000000 - 399999999; 400000000 - 402082299; 402082300 - 404314158; 404314159 - 406294344), LZX801GKA606B1 (315000000 - 315999999; 316000000 - 399999999), LZX801GKA606C1 (400000000 - 402082299), LZX801KA606 (312000000 - 312999999; 313000000 - 313999999; 314000000 - 314999999), LZX801KA606SS (312000000 - 312999999), LZX921GKA60600 (315000000 - 315999999; 316000000 - 399999999; 400000000 - 402082299; 402082300 - 404314158), LZX921KA606 (314000000 - 314999999), LZX940AKC606T0 (315000000 - 315999999), LZX940EKC606 (313000000 - 313999999; 314000000 - 314999999), LZX940EKC60600 (316000000 - 399999999; 400000000 - 402082299), LZX940EKC606T0 (315000000 - 315999999; 316000000 - 399999999; 400000000 - 402082299), LZX940EKC606W0 (400000000 - 402082299; 402082300 - 404314158; 404314159 - 406294344), LZX940KC606 (312000000 - 312999999), LZX980KC606 (312000000 - 312999999; 313000000 - 313999999), LZX993EBV606X1 (411294212 - 413950473; 413950474), LZZ23KA526 (790000 - 849999), LZZ23KC486 (790000 - 849999; 850000 - 919999), LZZ23KC526 (790000 - 849999; 850000 - 919999), LZZ24KA526 (850000 - 919999), LZZ24KA526CA (850000 - 919999), LZZ27KC526 (790000 - 849999; 850000 - 919999), LZZ27KC526CA (850000 - 919999), LZZ27KC606 (790000 - 849999; 850000 - 919999), LZZ27KC606CA (850000 - 919999), LZZ29KA606 (790000 - 849999; 850000 - 919999), LZZ29KA606LP (850000 - 919999), LZZ29KCE606 (850000 - 919999), LZZ34KA606 (790000 - 849999; 850000 - 919999), LZZ34KA726 (790000 - 849999; 850000 - 919999), LZZ34KC606 (850000 - 919999), LZZ34KC726 (850000 - 919999), LZZ38KC606 (850000 - 919999), LZZ38KC726 (850000 - 919999)

FAQ

This belt is used on Exmark Lazer Z zero-turn mowers with a 60-inch deck. Based on the available fitment references, it is associated with Lazer Z AS, AC, E-Series, S-Series, X-Series, ASX, and Z-Series 60-inch deck applications. Because Exmark fitment can vary by sub-model, serial number, and deck configuration, the safest match is to confirm your original belt number before ordering.
Known replacement and cross-reference numbers for this belt include 109-8073, 1098073, 109-8073-SL, 135-5774, 135-5774-SL, 116-1985, and 146-0183.
First, verify that your mower is an Exmark Lazer Z with a 60-inch deck. Then compare the belt number from your old belt, deck decal, or parts manual against these numbers: 109-8073, 1098073, 109-8073-SL, 135-5774, 135-5774-SL, 116-1985, and 146-0183. If your mower has had a deck swap or pulley changes, checking the model and serial number in the parts lookup is especially important.
Typical symptoms include the mower deck not engaging properly, blades slowing down in heavy grass, squealing during startup, burning-rubber smell, visible cracking or glazing on the belt, frayed belt edges, or repeated belt rolling off the pulleys. Uneven cut quality can also point to a worn deck belt or a tensioning problem.
For most owners or technicians, this is a moderate repair. Expect roughly 30 to 60 minutes if the pulleys and guards are accessible and not seized. Common tools include socket wrenches, a breaker bar or ratchet for releasing belt tension, and possibly pliers for belt covers or retainers. Before removing the old belt, it helps to photograph the routing so the new belt follows the same path.
Check all spindle pulleys, idler pulleys, spring-loaded tensioners, belt keepers, and spindle bearings. A new belt can fail quickly if an idler bearing is rough, a pulley is bent, a keeper is too close or too far from the belt, or the tension spring is weak. Also clean packed grass from the deck and confirm the pulley grooves are not worn or full of debris.
The most common causes are worn idler bearings, weak belt tension, misaligned pulleys, overheated belt surfaces from slipping, and debris buildup under the deck. On zero-turn mowers, repeated shock loads from engaging the PTO at high throttle or mowing in very heavy material can also shorten belt life. If the old belt shredded or jumped off, inspect the deck hardware closely instead of replacing only the belt.