Electric PTO Clutch SCITOO 717-05121 Electric PTO Lawn Mower Clutch Compatible for Bolens, for Cub Cadet, for Huskee, for MTD, for Sears Craftsman, for Troy Bilt, for White Outdoor

What It Is

The SCITOO 717-05121 is an aftermarket electric PTO (power take-off) clutch that engages and disengages the mower blades on lawn tractors and zero-turn mowers. It’s designed for residential use on models from Bolens, Cub Cadet, Huskee, MTD, Sears Craftsman, Troy-Bilt, and White Outdoor that originally used the OEM 717-05121 clutch.

Fitment & Compatibility

Before buying, verify these three things:

• OEM Part Number: This replaces OEM 717-05121. Check your current clutch for a stamped number or look up your mower’s model number (not serial) on a parts diagram to confirm.
• Shaft Size & Bolt Pattern: The clutch fits a 1-inch diameter crankshaft with a 3-bolt mounting pattern (holes spaced 2.5 inches apart). Measure your existing clutch’s center hole and bolt circle.
• Electrical Connector: It uses a 2-pin flat connector. If your mower has a different plug (e.g., round or 3-pin), you’ll need to splice wires or buy an adapter.
• Deck Size & Mower Series: Commonly fits 42-inch to 54-inch decks on MTD-based tractors (e.g., Cub Cadet LTX1040, Troy-Bilt Pony, Craftsman T110). Always double-check your model’s parts list – not all “compatible” brands use the same clutch.

Key Things to Know

• Build Quality: Aftermarket clutch, not OEM. Some users report shorter lifespan (2-3 seasons vs. 5+ for OEM) under heavy use. Acceptable for light residential mowing.
• Installation Difficulty: Moderate. You’ll need basic tools (socket set, puller for the old clutch). Expect 1-2 hours. The hardest part is often removing the stuck old clutch – use a puller, not a hammer.
• Common Gotcha: The air gap between the clutch and rotor is factory-set. If the clutch chatters or fails to engage after install, check the gap (0.010–0.015 inches) with a feeler gauge.
• Wiring Polarity: Reversing the two wires won’t damage the clutch, but the engagement may be weak. If it slips, swap the wires.

Should You Buy It

Buy this if you need a budget-friendly replacement for a residential mower with moderate use (1-2 acres weekly) and are comfortable with basic mechanical work. Skip it if you mow commercially, have a heavy-duty zero-turn, or want OEM reliability – invest in an OEM Cub Cadet or MTD clutch instead.