The ROP Shop Electric Clutch Counter Clockwise with 1" Crankshaft, 7 3/4" Pulley Diameter

What It Is

This is an electric PTO clutch that engages the mower blades on zero-turn mowers and some lawn tractors. It rotates counterclockwise, has a 1-inch crankshaft bore, and a 7 3/4-inch pulley diameter. It’s designed for machines that require a right-hand (counterclockwise) rotation clutch.

Fitment & Compatibility

Before buying, verify these four things:

• Crankshaft bore: Must be exactly 1 inch. Measure your crankshaft diameter with calipers—most common on larger zero-turn mowers.
• Pulley diameter: Must be 7 3/4 inches. A different size changes belt tension and blade speed.
• Rotation direction: Counterclockwise (viewed from the top). If your original clutch is clockwise, this will not work.
• Mounting pattern: Not standardized. Measure bolt hole spacing and pattern on your machine’s PTO mounting plate. This clutch uses a typical 3-bolt pattern, but confirm your holes align.
• Electrical: Typically 12V DC with a two-wire connector. Check that your mower’s wiring harness matches the connector type.

This is an aftermarket part, not OEM. It replaces clutches on many Bad Boy, Hustler, Gravely, and some commercial zero-turn models. Always cross-reference your OEM part number before buying.

Key Things to Know

• Quality: Budget-friendly aftermarket clutch. Works well for most residential and light commercial use, but not as durable as premium OEM clutches under heavy daily use.
• Installation difficulty: Moderate. Requires removing the mower deck, disconnecting the belt, unbolting the old clutch, and wiring the new one. A puller tool is needed to remove the old clutch from the crankshaft. Do not hammer it off.
• Common gotcha: The air gap between the clutch rotor and armature must be set correctly (usually 0.010–0.015 inches) after installation. If it’s too tight, the clutch may drag or not engage fully.
• Warranty: Typically 1 year. Keep proof of purchase and check ROP’s return policy before ordering.

Should You Buy It

If you need a reliable, affordable replacement for a counterclockwise PTO clutch on a zero-turn mower with a 1-inch shaft and 7 3/4-inch pulley, this is a solid value. It’s best for homeowners or light commercial users who want to save money over OEM parts. Heavy-duty commercial operators should consider a premium brand for longer life under constant use.