Garden Parts [Lifetime Warranty] GX21395 Mower Deck Belt - Compatible with John Deere 54" Deck E180 D170 LA150 LA175 G110 S180 190C LA150 | 161.4" x 5/8"
BlueStars GX21395 mower deck belt for John Deere 54-inch decks in branded packaging.
GX21395 mower deck belt for John Deere 54-inch decks shown in a promotional lifestyle graphic.
GX21395 mower deck belt specifications chart showing 161.4-inch length and 0.66-inch width for John Deere mowers.
GX21395 mower deck belt for John Deere 54-inch deck lawn tractors shown on product information graphic.
GX21395 mower deck belt features and construction diagram showing aramid fiber cords and chloroprene rubber composition.
GX21395 mower deck belt for John Deere 54-inch decks, shown with a lawn tractor and common mower symptom icons.
Installation guide for GX21395 mower deck belt showing maintenance tips for pulleys and tensioner springs.
Instructional graphic showing how to install a GX21395 mower deck belt on a John Deere lawn mower.
BlueStars GX21395 mower deck belt for John Deere 54-inch decks, coiled view with brand and size labeling.
BlueStars GX21395 mower deck belt for John Deere 54-inch decks in branded packaging.
GX21395 mower deck belt for John Deere 54-inch decks shown in a promotional lifestyle graphic.
GX21395 mower deck belt specifications chart showing 161.4-inch length and 0.66-inch width for John Deere mowers.
GX21395 mower deck belt for John Deere 54-inch deck lawn tractors shown on product information graphic.
GX21395 mower deck belt features and construction diagram showing aramid fiber cords and chloroprene rubber composition.
GX21395 mower deck belt for John Deere 54-inch decks, shown with a lawn tractor and common mower symptom icons.
Installation guide for GX21395 mower deck belt showing maintenance tips for pulleys and tensioner springs.
Instructional graphic showing how to install a GX21395 mower deck belt on a John Deere lawn mower.
BlueStars GX21395 mower deck belt for John Deere 54-inch decks, coiled view with brand and size labeling.
Lifetime Warranty

[Lifetime Warranty] GX21395 Mower Deck Belt - Compatible with John Deere 54" Deck E180 D170 LA150 LA175 G110 S180 190C LA150 | 161.4" x 5/8"

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GX21395 Mower Deck Belt

Key Features

  • Type: Mower Deck Drive Flat Belt
  • Length: 161.4 in (4099.6 mm)
  • Width: 5/8 in
  • Material: Aramid cord construction for strength and to prevent stretching
  • Function: Transfers power from the engine to the mower deck blades

Replaces / Cross-Reference Part Numbers

  • John Deere: GX21395
  • John Deere: GY20671

Compatibility & Fitment

  • Deck Size: Fits 54-inch mower decks
  • John Deere Models: 190C, D170, E180, G110, LA150, LA175, S180
  • John Deere Scotts Models: S1642, S1742, S2046, S2546

When to Replace

  • Visible signs of wear such as cracking, fraying, glazing, or missing sections
  • Noticeable decrease in blade speed or cutting performance
  • Audible squealing or slipping during mower deck engagement
  • Belt has become stretched, loose, or broken

Installation Tips

  • Disconnect the spark plug wire before servicing the mower deck
  • Refer to your mower's operator manual for the specific belt routing diagram
  • Ensure all pulleys are clean, spin freely, and are in good condition
  • Verify correct belt tension after installation to prevent slippage or premature wear
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  • PART NUMBERS

    PART NUMBERS

    This Lawn Mower Deck Belt replaces part numbers: J-Deere GX21395, GY20671; Oregon 75-799; Stens 265-302
  • 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
  • CHECK BEFORE INSTALLING

    CHECK BEFORE INSTALLING

    Check the Pulley Bearings, Edges, Grooves, and Tensioner Spring to ensure your belt maintains optimal performance
  • 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.
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#1 SOURCE OF HIGH-QUALITY REPLACEMENT PARTS

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FAQ

GX21395 is used on John Deere lawn tractors equipped with a 54-inch mower deck. Models referenced for this belt include E180, D170, LA150, LA175, G110, and 190C. Compatibility depends on the deck size and routing, so the safest check is to confirm your mower uses a 54-inch deck and matches part number GX21395 or the cross-reference number GY20671.
Yes. Based on available cross-reference information, this belt is associated with John Deere part number GX21395 and is also referenced as GY20671. Match the part number from your tractor or deck tag before ordering.
Typical symptoms include the blades not engaging properly, weak or uneven cutting, squealing when the deck is turned on, visible cracking or fraying, glazing on the belt surface, or the belt repeatedly slipping off the pulleys. A stretched belt can also cause poor blade speed even if it is not completely broken.
For most owners, this is a moderate repair. Expect about 30 to 90 minutes depending on deck access and whether the mower deck is removed. Common tools include a socket set, wrench set, pliers, and work gloves. On many 54-inch John Deere decks, installation is easier with the deck lowered or removed so you can route the belt correctly around the spindle pulleys, idlers, and PTO drive pulley.
The most common causes are normal wear, heat buildup, misrouted installation, worn idler pulleys, weak tensioners, seized spindle bearings, and debris packed around pulleys. If a new belt burns, twists, or jumps off quickly, inspect the idler bearings, spring tension, pulley alignment, and spindle condition before assuming the belt itself is the only problem.
Inspect all deck pulleys for wobble or rough bearings, make sure the idler arm moves freely, verify the tension spring is intact, and clean built-up grass from the pulley grooves and belt guards. It also helps to compare the old belt routing with the deck routing diagram before removal so the new belt is installed in the correct path.