8TEN Gen 3 Electric PTO Clutch for Warner 5218-220 5218-134 Bad Boy 070-1000-00 Ferris 5100084 5105090 255-775 82-501

What It Is

The 8TEN Gen 3 Electric PTO Clutch engages and disengages your mower deck blades electrically—it’s a direct replacement for Warner 5218-220 and 5218-134 units, and fits specific Bad Boy, Ferris, and other zero-turn mowers with 15-amp electrical systems.

Fitment & Compatibility

Before buying, confirm these three things:

• Physical measurements: The clutch has a 1-inch bore, 4.5-inch outer diameter, and 3-bolt mounting pattern (holes spaced 2.75 inches apart on a 3.5-inch bolt circle). Measure your old unit to match.
• Model cross-reference: Directly replaces Bad Boy 070-1000-00, Ferris 5100084 and 5105090, and part numbers 255-775 and 82-501. It also fits many Gravely, Hustler, and Snapper Pro models that use the Warner 5218 series. Check your mower’s parts diagram for the exact OEM number.
• Electrical and pulley: Requires a 15-amp fused circuit (common on most zero-turns). The pulley is 3.5 inches in diameter—verify your belt routing and clearance to the frame or deck.

Key Things to Know

• Quality vs. OEM: Build quality is good for the price, but the bearing and coil may not last as long as a genuine Warner unit under heavy commercial use. Fine for homeowner or light commercial.
• Installation difficulty: Moderate. You’ll need a puller to remove the old clutch (do not hammer it off) and a torque wrench to tighten the center bolt to 35-45 ft-lbs. The wiring is plug-and-play if your mower uses the standard 2-pin flat connector.
• Common gotchas: The clutch may come with the wrong bolt length—check your old bolt and reuse it if needed. Also, the air gap is pre-set, but if it slips, adjust it to 0.010-0.015 inches using feeler gauges.
• Noise: Some users report a slight whine during engagement; this is normal for aftermarket clutches and doesn’t affect function.

Should You Buy It

If you need a budget-friendly replacement for a residential or light commercial mower and your old clutch is a Warner 5218 series, this is a solid choice. Skip it if you run a commercial fleet daily—spend more for a genuine Warner unit to avoid downtime.