ACEBRI PTO Clutch for Hustler 601311 — 1 1/8" Shaft, CW Rotation, 200 in‑lb Torque

ACEBRI PTO Clutch: a heavy-duty, high-torque PTO clutch designed to replace Hustler 601311, Warner 5218-series, Grass-Hopper GH 388740 and many similar mower clutches.

This ACEBRI PTO clutch is engineered for commercial-style zero-turn and walk-behind mowers that need reliable blade engagement and consistent braking. Built from heat-treated steel and calibrated for a clockwise rotation, it fits a 1 1/8" crankshaft and pairs with 1/2" or 5/8" belts. The clutch offers up to 200 in-lb of engagement torque and is compatible with a broad list of OEM part numbers, making it a direct-fit replacement for many Hustler, Warner, Exmark, Toro, John Deere and Grass-Hopper applications.

Which mower models and OEM part numbers does this clutch replace?

This clutch covers numerous popular replacements across several brands for straightforward sourcing and repair.

• Direct Hustler fitment: 601311, 601311K (Mini Z and Super Mini Z series).
• Warner replacements: 5218-222, 5218-110 and other 5218-series numbers.
• Cross-references include Oregon 33-155, Exmark 631732/103-0501, Toro 631645/633099, John Deere TCA12522 and Grass-Hopper GH 388740.

How do I know this clutch will work on my machine?

Confirm three key measurements: crankshaft diameter, pulley diameter and belt width. The ACEBRI clutch is made for a 1 1/8" crankshaft, a 6.375" pulley and accepts 1/2" or 5/8" belts with clockwise rotation.

• Check your current clutch for the listed OEM numbers or measure shaft and pulley size.
• Verify belt width and rotation direction (CW) before purchase.
• Compare physical mounting holes and bolt pattern to ensure bolt-on compatibility.

What are the build and performance highlights of this ACEBRI clutch?

Manufactured from high-quality, heat-treated steel, this clutch emphasizes durability, consistent initial torque and dependable braking under load. It’s optimized to operate across wide temperature ranges for outdoor use.

• Heat-treated steel construction for wear resistance and long life.
• Higher initial torque design for positive blade engagement.
• Rated torque around 200 in-lb for common mower blade loads.

How difficult is installation and what should I expect during replacement?

Installation is a standard clutch swap for someone comfortable with small-engine repairs. Basic hand tools and routine safety precautions are all that’s needed; many users can complete the job in under an hour.

• Disconnect battery and remove belt before starting work.
• Unbolt the old clutch, align the new unit on the 1 1/8" crankshaft, and torque mounting bolts to spec.
• Reinstall belt, check pulley alignment and test blade engagement at low speed first.

Who this is for: This ACEBRI PTO clutch is aimed at landscapers, fleet managers and serious homeowners who maintain Hustler, Warner, Exmark, Toro, John Deere, Grass-Hopper and similar mowers. Choose it when you need a durable, cross-referenced replacement that restores consistent blade engagement and braking without sourcing hard-to-find OEM parts.