787366 / 787366K PTO Clutch Replacement for Hustler Super Z & Hustler Z | Warner 5218-219
787366 / 787366K PTO Clutch Replacement for Hustler Super Z & Hustler Z | Warner 5218-219
Overview
This 787366 PTO clutch replacement is an aftermarket electric clutch for select Hustler Super Z and Hustler Z commercial zero-turn mowers, including supported XR-7 deck configurations. It is also offered for related 787366K applications and cross-references Warner 5218-219.
The assembly features a 1-1/8-inch crankshaft bore, single-groove pulley measuring approximately 6-1/8 inches outside diameter, clockwise rotation viewed from the pulley side, and a reverse-mount configuration.
Key Features
- Aftermarket electric PTO clutch replacement for supported Hustler and Big Dog applications
- Primary OEM Reference: Hustler 787366
- Related Kit Reference: 787366K
- Manufacturer Cross-Reference: Warner 5218-219
- Crankshaft Bore: 1-1/8 inches / 1.125 inches
- Measured Pulley Outside Diameter: approximately 6-1/8 inches / 6.125 inches
- Pulley Type: single-groove V-belt pulley
- Belt Width: 5/8-inch belt on supported applications; use the OEM-specified belt for your mower
- Rotation: clockwise (CW), viewed from the pulley side
- Mounting Style: reverse mount
- Voltage: 12V DC
- Connector: flat side-by-side at clutch or optional wire harness to extend to T-plug
- Integrated electromagnetic clutch and brake assembly
Compatible Hustler & Big Dog Applications
This replacement is intended for select mower configurations specifying 787366, 787366K, or the corresponding Warner clutch configuration.
Hustler Applications
- Hustler Super Z: select legacy applications, including supported XR-7 deck configurations
- Hustler Z: select legacy applications, including supported XR-7 deck configurations
- Hustler Super Mini Z: select legacy applications using 787366
- Hustler TrimStar 48: select model 927129 applications
- Hustler TrimStar 54: select model 927137 applications
- Hustler ATZ, Z4, and X-ONE: select configurations specifying the listed clutch numbers
Big Dog Applications
- Select Big Dog mower configurations referencing 787366 or 787366K
Fitment varies by mower model, serial number, engine package, and deck configuration. Confirm the original clutch number or consult the parts diagram for your exact mower before ordering.
OEM Part Number References
- Hustler / Excel: 787366, 787366K
- Big Dog: 787366, 787366K
Manufacturer Cross-Reference
- Warner Electric: 5218-219
- Warner Electric: 5218219
- Earlier Warner Electric: 5218-110
- Earlier Warner Electric: 5218110
Warner identifies 5218-219 as the replacement for 5218-110 and lists 787366 among its manufacturer part-number references.
Aftermarket Cross-Reference
- Xtreme: X0246
Before You Order
Compare your original clutch with the product photos and confirm:
- The original clutch number matches a supported reference listed above
- The crankshaft requires a 1-1/8-inch bore
- The bore, drive bushing, and key arrangement match the required installation
- The mower uses a single-groove, reverse-mount clutch
- Rotation is CW when viewed from the pulley side
- The belt groove, pulley offset, and mounting height suit your mower
- The electrical connector, required wiring components, and anti-rotation connection match the installation
- The correct mounting hardware and spacer arrangement are available
Some legacy Hustler applications use a separate mower-side diode harness. Follow the mower’s wiring diagram and retain any specified circuit protection when replacing the clutch.
Need help comparing your clutch? Send us the mower model, serial number, original clutch number, and clear photos before ordering.
What’s Included
- Complete aftermarket electric PTO clutch assembly
- Integrated single-groove pulley
- Pre-installed bearing assembly
- Electromagnetic coil and brake assembly
- Flat side-by-side clutch connector
- Optional wire harness extension
Why Buy From PTO Direct USA?
- Fast USA shipping
- Fitment Guarantee
- Fitment support before and after purchase
- Clear product photos for easier clutch identification
- Support for homeowners, commercial operators, and mower repair professionals
FAQ
Does this PTO clutch replace Hustler 787366?
Yes. This aftermarket clutch is offered as a replacement for Hustler 787366 on supported applications. Match your original clutch number and physical configuration before ordering.
Does this cover 787366K applications?
The 787366K kit reference is included in the supported replacement references. Compare any required wiring and mounting accessories with the What’s Included section and product photos.
What Warner number corresponds to Hustler 787366?
Warner directly lists 787366 under 5218-219. Warner also identifies 5218-219 as the replacement for the earlier 5218-110 clutch.
Does this fit every Hustler Super Z or Hustler Z?
No. These mower families use multiple clutch configurations. Confirm the original clutch number and the parts diagram for your complete mower model and serial number. The XR-7 deck name alone does not determine clutch fitment.
Does this fit a Hustler TrimStar?
It is listed for select TrimStar 48 model 927129 and TrimStar 54 model 927137 applications. Confirm the engine package and original clutch number before ordering.
Why do some reference specifications list a 6.3-inch pulley?
Warner lists a 6.31-inch outside diameter for its 5218-219 clutch. The aftermarket unit offered here has a measured outside diameter of approximately 6.125 inches.
Outside diameter and the working diameter where the belt rides are different measurements. For belt speed, the critical measurement is that working diameter—not the outer flange edge. This aftermarket clutch is designed to replace the OEM and manufacturer part numbers listed here.
Is this a reverse-mount clutch?
Yes. This replacement uses a reverse-mount configuration. Follow the mounting orientation, drive-bushing arrangement, and spacer placement specified for your mower. Product-photo orientation is not an installation diagram.
What connector does this clutch use?
The clutch has a flat side-by-side connector, with an optional wire harness extension to a T-plug. Compare your mower’s wiring connection before selecting the harness option.
Is the optional extension the same as a mower-side diode harness?
They serve different purposes. The optional extension provides additional reach and the T-plug connection. If your mower requires a separate diode harness, confirm that requirement against its wiring diagram; connector shape alone does not confirm the required circuit protection.
What belt should I use?
Use the OEM-specified belt for your exact mower and deck configuration. Belt width, length, and profile must suit the complete drive system.
Can PTO Direct USA help confirm fitment?
Yes. We provide fitment support before and after purchase. Email support@ptodirectusa.com with your mower model, serial number, engine information, and original clutch number. Photos of the clutch label, bore, drive bushing, pulley, connector, and anti-rotation connection help us compare the installation.