PetMigo Deck Spindle Assembly for Bad Boy MZ/MZ Magnum & 2016–2017 Stand-On — 3-Pack, OEM 037-2000-00/037-2050-00, Aluminum Housin

PetMigo Deck Spindle Assembly 037-2000-00 / 037-2050-00 is a direct-fit replacement spindle pack (three pieces) designed for Bad Boy MZ, MZ Magnum decks and select 2016–2017 Stand-On models.

If your mower deck is showing vibration, uneven cut, or a failing spindle, these PetMigo replacement spindles offer a cost-effective way to restore deck stability and cutting performance. Each assembly matches factory mounting points and dimensions so installation is straightforward for anyone familiar with basic lawn tractor maintenance. The package includes three complete spindle assemblies and comes with a one-year warranty for added confidence.

Which mower models and deck sizes will these spindles fit?

These spindles are made to replace OEM part numbers 037-2000-00 and 037-2050-00 and fit several Bad Boy mower decks. Confirm model compatibility before purchase by matching part numbers or measuring your spindle housing and bolt pattern.

• Fits Bad Boy MZ 42" decks and MZ Magnum 48" and 54" decks.
• Compatible with 2016–2017 Stand-On models for the 36" deck configuration only.
• Direct replacement for OEM 037-2000-00 and 037-2050-00 part numbers.

What are the spindle dimensions and construction details?

The 037-2050-00 spindle has specific measurements and a durable housing material built to handle common mowing stresses. Knowing these specs helps ensure the part matches the original unit and maintains blade alignment.

• 037-2050-00 spindle height: 5 2/3" (approx.).
• Outer diameter (OD): approximately 5 1/4" for the housing flange.
• Aluminum housing for reduced weight and corrosion resistance.

What comes in the package and what warranty is included?

This listing delivers three complete spindle assemblies so you can replace all spindles on many decks in a single job. PetMigo backs the product with a seller warranty to help address manufacturing issues discovered after installation.

• Package contains three spindle assemblies (3-pack), matching 037-2000-00 / 037-2050-00.
• Ships as complete assemblies—no separate purchase of housings or housings bearings required if replacing like-for-like.
• Includes a one-year warranty; contact PetMigo directly for returns or warranty claims.

How easy is installation and what should I check during replacement?

Installation is straightforward for anyone with basic mechanical skills and common shop tools. Take care to torque mounting hardware to factory specs and inspect blades and belts while the deck is disassembled.

• Compare bolt pattern and housing dimensions to your old spindle before installation.
• Replace blades and belts if they show excessive wear when spindles are removed.
• Use correct torque values and thread locker where recommended by the mower manufacturer.

Who this is for: PetMigo's 3-pack spindle assemblies are ideal for homeowners, landscapers, and small commercial operators who maintain Bad Boy MZ or MZ Magnum zero-turn mowers and need a reliable, budget-friendly replacement. Choose this kit if you prefer replacing multiple spindles at once to minimize downtime, want aluminum housings for corrosion resilience, and value a one-year seller warranty for peace of mind.