Spindle Assembly 037-6015-00 for Husqvarna Bad Boy 61-Inch / 60-Inch / 72-Inch Deck

Overview

This aftermarket 037-6015-00 / 037-6015-50 spindle assembly is a replacement-style mower deck spindle assembly for select Bad Boy mower deck applications.

Choose the package option that matches your repair. Match your original spindle number, pulley number, and blade number before ordering.

Key Features

• Aftermarket replacement-style Bad Boy mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Spindle Numbers: 037-6015-00, 037-6015-50
• Available Package Options: single spindle assembly or 72-inch spindle, pulley, blade, and hardware kit
• 72-Inch Pulley Path: 033-7203-00
• 72-Inch Blade Path: 038-7230-00
• Hardware References: 018-6021-00, 018-6020-00
• Built around Bad Boy spindle part numbers first to reduce fitment confusion

Compatible Brands & Model Series

This 037-6015-00 / 037-6015-50 spindle assembly is associated with select Bad Boy mower deck applications using the listed spindle replacement path.

Single spindle supplier references include:

• Bad Boy Revolt 48-inch deck reference
• Bad Boy Revolt 54-inch deck reference
• Bad Boy Revolt 61-inch deck reference

72-inch spindle, pulley, and blade kit references include:

• Bad Boy Pup 72-inch, 2007
• Bad Boy AOS 72-inch, 2007 through 2008
• Bad Boy AOS Diesel 72-inch, 2007 through 2009
• Bad Boy Pup and Lightning 72-inch, 2008 through 2009

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• Bad Boy Spindle Assembly Numbers: 037-6015-00, 037-6015-50
• Bad Boy 72-Inch Spindle Pulley Number: 033-7203-00
• Bad Boy 72-Inch High-Lift Blade Number: 038-7230-00
• Blade Hardware References: 018-6021-00, 018-6020-00

Optional Package Part Number Breakdown

Part numbers below may apply to available package options. Not every package includes every component listed. Select the option that matches the parts needed for your repair.

• Spindle / Mandrel Numbers: 037-6015-00, 037601500, 037-6015-50, 037601550
• 72-Inch Spindle Pulley Numbers: 033-7203-00, 033720300
• Additional Pulley Reference Found in Supplier Data: 033-6003-00, 033600300
• 72-Inch High-Lift Blade Numbers: 038-7230-00, 038723000
• Blade Hardware / Small Parts: 018-6021-00, 018602100, 018-6020-00, 018602000, M16X1

Spindle Specifications

• Spindle Numbers: 037-6015-00, 037-6015-50
• Single Spindle Item Length Reference: 193.6 mm / 7.62 inches
• Single Spindle Width Reference: 133.6 mm / 5.26 inches
• Single Spindle Height Reference: 133.6 mm / 5.26 inches
• Single Spindle Mounting Hole Distance: 114.3 mm / 4.50 inches
• Pulley Thread Size Reference: M16-1.5
• Deck References: 48 inch, 54 inch, 61 inch, and 72 inch paths depending on selected package and mower model
• Application Note: Confirm spindle height, mounting pattern, pulley thread, shaft setup, blade hardware, and belt routing before ordering

Pulley Specifications

• 72-Inch Pulley Number: 033-7203-00
• Pulley Type: 7-inch spindle deck pulley
• Deck Reference: 72 inch
• Additional Pulley Reference Found in Supplier Data: 033-6003-00
• Pulley Note: Use 033-7203-00 for the 72-inch kit path. Use 033-6003-00 only when the selected package or product image confirms that pulley path.

Blade Specifications

• Blade Number: 038-7230-00
• Blade Style: High-lift Fusion blade
• Deck Reference: 72 inch
• Blade Note: This blade is only included with the selected 72-inch spindle, pulley, blade, and hardware kit.

Hardware References

• Blade Hardware References: 018-6021-00, 018-6020-00
• Thread Reference: M16X1
• Hardware Note: Hardware is only included when shown in the selected package option or product image.

Need the Complete 60-Inch Deck Kit?

This listing is for the 037-6015-00 / 037-6015-50 spindle assembly path. If your Bad Boy ZT, CZT, Pup, or Pup Lightning 60-inch deck also needs blades and a deck belt, see the 60-inch deck rebuild kit for Bad Boy ZT, CZT, Pup, and Pup Lightning mowers.

Common Symptoms / When to Replace

• Mower deck spindle is noisy, loose, seized, or wobbling
• Blade has excessive play at the spindle shaft
• Deck vibration increases during blade engagement
• Spindle pulley is worn, damaged, bent, or no longer tracking the belt correctly
• Blade is bent, worn, dull, or no longer cutting evenly
• Original spindle, pulley, blade, or hardware number matches the listed Bad Boy replacement path

Quick Ship Fulfillment

This item may ship directly from one of our trusted U.S. distribution partners to help reduce transit time. Packaging, labeling, or warehouse origin may vary, but the part will match the replacement numbers, fitment notes, and specifications shown in this listing.

Why Buy From PTO Direct USA

• Fitment-first product organization by Bad Boy spindle part-number path
• Clear separation between spindle, pulley, blade, and hardware references
• Single spindle and 72-inch kit package options in one clean listing
• U.S.-focused fulfillment options for faster delivery when available

Need a Custom Package?

Need a different combination of parts? Email us the part type and part numbers you need, such as spindle assemblies, blades, belts, pulleys, reinforcement rings, bearings, or hardware. We can review the part-number path and quote a custom package when available.

FAQ

Is this an OEM Bad Boy spindle assembly?

No. This is an aftermarket replacement-style spindle assembly package intended to replace the listed Bad Boy part-number path when the physical fitment details match.

What are the lead spindle numbers for this listing?

The lead spindle numbers are 037-6015-00 and 037-6015-50.

Is 033-6003-00 a spindle number?

No. 033-6003-00 is a pulley reference and should not be listed as a spindle assembly number.

Is 033-7203-00 a spindle number?

No. 033-7203-00 is the spindle pulley number for the 72-inch package path.

Is 038-7230-00 a pulley number?

No. 038-7230-00 is a 72-inch high-lift Fusion blade number and should stay in the blade bucket.

Do all package options include the blade and hardware?

No. The single spindle assembly option does not include the blade or hardware. The 72-inch kit option includes the spindle, pulley, blade, and hardware references when selected.

Does this fit Bad Boy Revolt 48, 54, and 61-inch decks?

The single spindle assembly option is associated with Bad Boy Revolt 48, 54, and 61-inch deck references. Match your original spindle number before ordering.

Does this fit Bad Boy 72-inch decks?

The 72-inch kit option is associated with select Bad Boy Pup, AOS, AOS Diesel, Pup, and Lightning 72-inch deck references. Match your original spindle, pulley, and blade numbers before ordering.

Can I order by deck size only?

No. Deck size alone is not enough. Match the original spindle number first, then confirm pulley number, blade number, hardware requirements, mower model, deck layout, mounting pattern, and belt routing before ordering.