116-1620 Electric PTO Clutch Fits for Exmark Toro 109-9282, 116-1947, 116-1604, 116-4477, 5218-54, 109-9275, 717-04967, E-Series Lazer Z Series S-Series Lawn Mower

What It Is

This is an electric PTO clutch that engages and disengages the mower blades on zero-turn mowers. It’s designed for Exmark and Toro commercial and residential models (E-Series, Lazer Z, S-Series) and replaces a wide range of OEM part numbers.

Fitment & Compatibility

Before buying, check these three things:

• OEM cross-reference: Confirmed fits Exmark 109-9282, 116-1947, 116-1604, 116-4477, 5218-54, 109-9275, and Toro 717-04967. Verify your mower’s specific part number against this list.
• Physical measurements: This clutch has a 1-inch bore, 3.25-inch shaft length, and 4.5-inch OD. Measure your old clutch or shaft to confirm these specs.
• Deck size and model series: Works on 48–72 inch decks with standard PTO drive. Not compatible with older mechanical or manual PTO systems. Cross-check your mower’s serial number with Exmark/Toro compatibility charts if unsure.
• Electrical connector: Typically uses a 2-pin flat connector. If your mower has a different plug, you may need a pigtail adapter.

Key Things to Know

• Quality: Aftermarket replacement, not OEM. At 4.9 stars (13 reviews), it’s well-rated, but inspect for smooth bearing rotation and no play in the pulley before installation.
• Installation difficulty: Moderate. Requires removing the mower deck, disconnecting the old clutch (puller tool recommended), and torquing the center bolt to 45–55 ft-lbs. No special wiring skills needed.
• Common gotchas: The air gap between the armature and rotor must be set to 0.010–0.020 inches with a feeler gauge. Too tight or loose causes slipping or drag. Also, check your battery voltage (12V minimum) – low voltage can prevent engagement.
• Warranty: Usually 1-year limited. Confirm with seller before purchase.

Should You Buy It

If you own an Exmark or Toro zero-turn with a failed electric PTO and want a budget-friendly alternative to OEM (which often costs $200+), this is a solid choice. It’s best for DIYers comfortable with basic mechanical work and deck removal. Avoid if you need a quick swap without adjusting the air gap, or if your mower uses a different shaft diameter or connector.