[Lifetime Warranty] 041-6400-00 Pump Belt Replacement - Fits Bad Boy MZ Magnum ZT Elite ZT Avenger CZT Outlaw Stand-On Compact Outlaw 041640000 Mower Drive Belt | 1/2" x 66.25"
041-6400-00 replacement pump drive belt for Bad Boy mowers in branded retail packaging.
Specification chart for 041-6400-00 mower drive belt showing dimensions and compatibility details.
041-6400-00 mower pump drive belt compatibility chart for Bad Boy ZT, MZ, and Outlaw series mowers.
Infographic guide for identifying the correct 041-6400-00 mower drive belt application and compatibility.
041-6400-00 mower drive belt replacement with compatibility chart for Bad Boy MZ, ZT Elite, and Avenger mowers.
Infographic showing 041-6400-00 mower pump belt construction with aramid fiber cords and chloroprene rubber.
041-6400-00 replacement mower drive belt for Bad Boy mowers, shown with symptoms of a worn belt.
BlueStars 041-6400-00 mower pump belt replacement comparison chart showing performance benefits and specifications.
Informational graphic for 041-6400-00 mower drive belt replacement with installation tips for Bad Boy mowers.
041-6400-00 pump belt replacement for Bad Boy mowers with easy installation instructions and visual guide.
041-6400-00 replacement pump drive belt for Bad Boy mowers in branded retail packaging.
Specification chart for 041-6400-00 mower drive belt showing dimensions and compatibility details.
041-6400-00 mower pump drive belt compatibility chart for Bad Boy ZT, MZ, and Outlaw series mowers.
Infographic guide for identifying the correct 041-6400-00 mower drive belt application and compatibility.
041-6400-00 mower drive belt replacement with compatibility chart for Bad Boy MZ, ZT Elite, and Avenger mowers.
Infographic showing 041-6400-00 mower pump belt construction with aramid fiber cords and chloroprene rubber.
041-6400-00 replacement mower drive belt for Bad Boy mowers, shown with symptoms of a worn belt.
BlueStars 041-6400-00 mower pump belt replacement comparison chart showing performance benefits and specifications.
Informational graphic for 041-6400-00 mower drive belt replacement with installation tips for Bad Boy mowers.
041-6400-00 pump belt replacement for Bad Boy mowers with easy installation instructions and visual guide.
Lifetime Warranty

[Lifetime Warranty] 041-6400-00 Pump Belt Replacement - Fits Bad Boy MZ Magnum ZT Elite ZT Avenger CZT Outlaw Stand-On Compact Outlaw 041640000 Mower Drive Belt | 1/2" x 66.25"

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041-6400-00 Pump Belt Replacement (1/2" x 66.25")

Key Features

  • Type: Pump Drive Belt
  • Width: 1/2 inch (0.5 in)
  • Outer Circumference: 66.25 inches
  • Engineered for direct-fit replacement
  • Constructed for durability and consistent power transmission

Replaces / Cross-Reference Part Numbers

  • 041-6400-00
  • 041640000
  • 266-164
  • 15-244
  • 0416400

Compatibility & Fitment

  • Fits select Bad Boy Mowers models, including but not limited to:
    • MZ Magnum
    • ZT Elite
    • ZT Avenger
    • CZT
    • Outlaw
    • Stand-On
    • Compact Outlaw
  • Note: Always verify the part number from your owner's manual to ensure correct fitment.

When to Replace

  • Loss of hydraulic power to drive wheels
  • Visible signs of wear such as cracking, fraying, or glazing
  • Audible squealing or slipping during operation
  • Belt is broken or stretched beyond tensioner adjustment range

Installation Tips

  • Disconnect the spark plug wire and ensure the mower is on a level surface before starting work.
  • Refer to your mower's service manual for the correct belt routing diagram and tensioning specifications.
  • Inspect pulleys and tensioner for wear, damage, or misalignment before installing the new belt.
  • Ensure the belt is properly seated in all pulley grooves.
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  • PART NUMBERS

    PART NUMBERS

    This Drive Belt replaces part numbers: Toro 120-9470
  • 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.
FIT BAD BOY

FIT BAD BOY

ZT (2007-2012) ZT Elite (2013-2025) ZT Elite Limited (2023) ZT Avenger (2020-2025) | MZ (2010-2016, 2018) MZ & MZ Magnum (2017, 2019-2022) MZ Magnum (2013-2016, 2023-2025) MZ Rambler (2023-2025) | CZT (2010-2013) CZT Elite (2014-2015) | Stand-On (2012-2017) Compact Outlaw (2016-2021) Walk Behind (2017)

FAQ

This pump belt is commonly associated with several Bad Boy zero-turn and stand-on mower lines, including MZ, MZ Magnum, ZT, ZT Elite, ZT Avenger, CZT, Outlaw Stand-On, and Compact Outlaw. Some listings also reference certain year ranges within those families. Because Bad Boy used different belt setups across decks, drive systems, and production years, the safest match is to confirm your mower's model and the belt number on the original belt or parts diagram before ordering.
Known replacement and reference numbers for this belt include 041-6400-00, 041640000, 041-6400, 0416400, and A-041-6400-00. Matching one of these numbers to your original belt or your mower's parts lookup is the best way to verify fit.
The pump belt transfers power from the engine to the hydro pump drive system. If this belt slips, stretches, frays, or breaks, the mower may lose or weaken ground drive, move inconsistently, or stop driving altogether even though the engine still runs normally.
Typical symptoms include reduced drive power, weak uphill performance, intermittent movement, squealing from the drive area, visible cracking or fraying, glazing on the belt sides, or a belt that has become loose enough to slip. In severe cases, the mower may not move forward or reverse at all.
On most Bad Boy zero-turns, pump belt replacement is a moderate repair. It usually involves safely lifting or accessing the rear drive area, removing belt guards or covers, relieving idler tension, and routing the new belt exactly as the original. Common tools are socket and wrench sets, pliers, and possibly a breaker bar for the tensioner. For someone familiar with mower service, the job often takes about 30 to 90 minutes depending on model access.
Inspect the idler pulley, tensioner arm, pulley alignment, belt guides, and hydro pump pulleys before installation. A new belt can fail early if a pulley bearing is rough, a tension spring is weak, or the belt path is misaligned. Also clean packed grass and debris from the belt area so heat and slippage are less likely.
The most common causes are normal wear, heat buildup, misalignment, weak tensioners, seized or rough pulleys, and contamination from oil or debris. Repeated shock loads from abrupt direction changes, heavy towing, or operating on steep terrain can also shorten belt life. If the old belt failed suddenly, it is worth checking for a pulley or tensioner problem rather than replacing the belt alone.