Spindle Assembly 51510000 / 61543800 for Ariens Gravely Zoom ZT

Overview

This aftermarket 51510000 / 61543800 spindle assembly is a replacement-style mower deck spindle assembly for select Ariens and Gravely mower deck applications.

This listing is organized around the 51510000 / 61527600 / 61543800 spindle path. Optional package choices may include spindle pulleys, idler pulleys, mower blades, or a deck belt depending on the selected option. Match your original spindle number, mower model, deck size, pulley layout, blade path, and belt routing before ordering.

Key Features

• Aftermarket replacement-style mower deck spindle assembly
• Product Type: Spindle Assembly
• Lead Part Numbers: 51510000, 61543800
• Also Replaces: 61527600
• Common Deck References: 40 inch, 44 inch, and 52 inch deck paths appear across this spindle family
• Optional package variants may include spindle pulleys, idler pulleys, blades, or deck belt components
• Organized by spindle or mandrel part number first to reduce fitment confusion

Compatible Brands & Model Series

This 51510000 / 61543800 spindle assembly is used on select Ariens and Gravely Zoom, ZT, and related mower deck applications.

Supplier model references include:

• Ariens Zoom 52, model 915041, 22 HP Briggs & Stratton, serial 000101 and above
• Ariens Zoom 52, model 915059, 23 HP Kohler, serial 000101 and above
• Ariens Zoom 52, model 915083, 25 HP Kohler, serial 020000 to 024999
• Gravely ZT 2252, model 915040, 52-inch deck, serial 000101 and above
• Gravely ZT 2552, model 915082, 52-inch deck, serial 020000 to 034999
• Ariens / Gravely Zoom and ZT deck paths using the listed 51510000 spindle family

Verify your part numbers before ordering.

Replaces OEM Part Numbers

• Ariens / Gravely Spindle Numbers: 51510000, 61527600, 61543800

Aftermarket Cross-Reference Numbers

• Stens: 285-354
• Oregon: 82-040

Available Package Options

Select the package option that matches the parts needed for your repair. Not every package includes every component listed below.

• Spindle with Pulley and Belt Package: includes 3 spindle assemblies, 3 spindle pulleys, additional idler pulleys, and 1 deck belt.
• Spindle with Pulley and Blade Package: includes 3 spindle assemblies, 3 spindle pulleys, and 3 mower blades.

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: 51510000, 61527600, 61543800
• Aftermarket Spindle Cross-References: 285-354, 82-040
• Spindle Pulley Numbers: 01593700
• Idler Pulley Numbers: 07300101, 07312500, 07312559, 07300028
• Blade Numbers: 00273100, 00450300, 03253800, 03399704, 04916400, 04917900, 1521227, 1521227S, 5021227, A48185, FR5101756, AM104490, PT8721, 1756152AYP, 355-061, 038-3000-00, 112111-02, 12111-02, 32022A, 32022HD, WM132022, 1-303146, 1-303495, 1-303527, 303527, 633482, 633484
• Deck Belt Number: 07242900

Commonly associated belt listing: Deck Belt 07242900

Single Spindle Specifications

• Spindle Part Number: 51510000
• Also Replaces: 61527600, 61543800
• Aftermarket Cross-References: 285-354, 82-040
• Spindle Width: 107 mm / 4.21 inches
• Mounting Hole Distance: 88 mm / 3.46 inches
• Height Reference: 4-1/4 inches
• Hardware Note: Blade mounting hardware is not included unless shown in the selected package option or product image

Optional Package Component Specifications

Spindle Pulley Specifications

• Spindle Pulley Quantity: 3 when included in selected package
• Spindle Pulley Number: 01593700
• Pulley Width: 26.1 mm / 1.02 inches
• Inner Diameter: 25.0 mm / 0.98 inch
• Outer Diameter: 121.5 mm / 4.78 inches

Idler Pulley Specifications

• Idler Pulley Numbers: 07300101, 07312500, 07312559
• Quantity: 1 when included in selected package
• Pulley Width: 26 mm / 1.02 inches
• Inner Diameter: 9.5 mm / 0.37 inch
• Outer Diameter: 114.5 mm / 4.50 inches

Secondary Idler Pulley Specifications

• Secondary Idler Pulley Number: 07300028
• Quantity: 2 when included in selected package
• Pulley Width: 35.6 mm / 1.40 inches
• Inner Diameter: 9.85 mm / 0.38 inch
• Outer Diameter: 102.5 mm / 4.03 inches

Blade Specifications

• Blade Quantity: 3 when included in selected package
• Blade Length: 454 mm / 17.8 inches
• Blade Width: 63.25 mm / 2.49 inches
• Blade Thickness: 5.1 mm / 0.20 inch
• Center Hole: 16.22 mm / 0.64 inch

Deck Belt Specifications

• Deck Belt Quantity: 1 when included in selected package
• Deck Belt Number: 07242900
• Belt Length: 3321.05 mm / 130.75 inches
• Belt Width: 1/2 inch
• Belt Height: 10.0 mm / 0.39 inch

What’s Included

• Spindle with Pulley and Belt Package: 3 spindle assemblies, 3 spindle pulleys, 1 idler pulley, 2 secondary idler pulleys, and 1 deck belt
• Spindle with Pulley and Blade Package: 3 spindle assemblies, 3 spindle pulleys, and 3 mower blades
• Use the selected variant title and product images to confirm exact package contents before checkout

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
• Pulleys are worn, bent, noisy, or no longer tracking the belt correctly
• Blades are bent, worn, dull, or cutting unevenly
• Deck belt is cracked, glazed, stretched, or jumping off the pulleys
• Original part numbers match the listed spindle, pulley, blade, or belt paths

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 replacement part-number path
• Clear spindle, pulley, blade, and belt references for package variants
• 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 Ariens / Gravely spindle assembly?

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

What are the lead part numbers for this listing?

The lead spindle numbers are 51510000 and 61543800. This listing also references 61527600, 285-354, and 82-040 in the same spindle replacement path.

Do all package options include blades and a belt?

No. Package contents vary by selected option. One package path includes pulleys and a belt, while another package path includes pulleys and blades. Review the selected variant title and product images before checkout.

Is 01593700 a spindle number?

No. 01593700 is a spindle pulley number used in some package options for this spindle path.

Is 07242900 a spindle number?

No. 07242900 is a deck belt number and should stay in the belt bucket.

Can I order by deck size only?

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