The ROP Shop Electric PTO Clutch Replacement for Warner 5219-51, 5219-79, 917-04174, 917-04174A

What It Is

This is an aftermarket electric PTO (power take-off) clutch that engages and disengages the mower deck blades on select lawn tractors. It directly replaces Warner part numbers 5219-51, 5219-79, and OEM numbers 917-04174 / 917-04174A.

Fitment & Compatibility

Before buying, confirm these three things:

• Measure the shaft diameter – must be 1" x 1" with a 3/16" keyway. Also check the shaft length (typically 1.5" to 2").
• Check your mower model – this fits many Husqvarna, Craftsman, Poulan, and AYP/Electrolux models from the early 2000s onward. Verify your specific model number (not just brand) against the ROP Shop fitment list.
• Wiring – it uses a standard two-wire connector (12V DC). If your original had a different plug, you may need to splice or adapt.

Key Things to Know

• Build quality – Generally good for the price, but some users report slightly more noise than OEM Warner units. It’s a budget-friendly alternative, not a premium upgrade.
• Installation difficulty – Moderate. You’ll need basic hand tools, a puller for the old clutch, and a torque wrench (spec is typically 35-45 ft-lbs on the center bolt).
• Common gotcha – The air gap between the clutch rotor and armature is pre-set, but check it (0.010"–0.015") after mounting. Too tight or too loose can cause engagement issues or rapid wear.
• Bearing longevity – The sealed ball bearing is decent, but if you mow in wet or dusty conditions, consider adding a bearing shield or regular cleaning.

Should You Buy It

If you need a reliable, cost-effective replacement for a failed Warner PTO clutch and your mower is in decent shape, this is a solid choice. It’s not for pros running commercial decks daily, but for homeowner or light-duty use, the 4.8-star rating and $160 price make it a smart buy over the $250+ OEM option.