99078 PTO Clutch Replacement for Bush Hog ZT Series | Replaces 5218-46 & More

Overview

This Bush Hog PTO clutch 99078 replacement is designed as a direct OEM-spec replacement for Bush Hog zero-turn mower platforms. This electric PTO clutch restores smooth blade engagement, consistent torque transfer, and reliable long-term mowing performance.

Commonly used on Bush Hog and Rhino zero-turn mowers, this clutch is built for high torque output and dependable PTO engagement in commercial and heavy-duty residential applications.

Built with a 4.88-inch pulley, 1-1/8 inch crankshaft bore, CCW rotation, and a 370°F thermal cutoff, this clutch is engineered for reliable operation at speeds up to 3600 RPM. Encapsulated coils and high-temperature bearings ensure consistent engagement and long service life.

Key Features

• Direct OEM replacement electric PTO clutch assembly
• Pulley Diameter: 4.88 inches
• Crankshaft Size: 1-1/8 inch
• Rotation: CCW (counter-clockwise)
• Operating Speed: Up to 3600 RPM
• 370°F Thermal Cutoff to protect against overheating
• Encapsulated electromagnetic coil for reliable engagement
• High-temperature bearings for consistent performance
• Enhanced torque output for improved blade engagement
• Fully assembled and ready to install

Compatible With These Brands & Model Series

This PTO clutch fits Bush Hog and Rhino zero-turn mower platforms using the same specification.

• Bush Hog Zero-Turn Mowers: ZT18, ZT180, ZT22, ZT220, ZT230, ZT25, ZT250
• Rhino Zero-Turn Mowers: Compatible models using OEM part number 99078

Fitment can vary by model and year. Always confirm your part number matches one of the numbers listed below.

Replaces OEM Part Numbers

• Bush Hog: 99078

Aftermarket Cross-Reference Numbers

• Warner: 5218-46
• Xtreme: X0298, X0298-K

What’s Included

• Complete electric PTO clutch assembly
• Factory-balanced 4.88" pulley
• Pre-installed high-temperature bearings
• Encapsulated electromagnetic coil
• Plug-and-play wiring connector

Why Buy From PTO Direct USA?

• Fast USA shipping
• OEM-spec fitment guarantee
• 1-year warranty
• Premium PTO Direct USA product images for easy identification
• Trusted replacement supplier for commercial operators and professionals

Need a different fitment? Browse the full electric PTO clutch catalog to find the correct replacement.