20A Upgrade Blade Clutch PTO Switch for John Deere S130 S140 S160 S170 S180 Garden Tractors Lawn Mowers

What It Is

This is an aftermarket PTO (Power Take-Off) blade engagement switch, designed to replace the original switch on John Deere S100-series garden tractors. It controls the electric clutch that engages and disengages the mower blades.

Fitment & Compatibility

• Direct fit for: John Deere S130, S140, S160, S170, S180 (gas models only, not electric).
• OEM replacement: Replaces John Deere part numbers AM137410, AM137411, AM140761, AM140762. Cross-check your tractor’s PTO switch connector shape (square or rectangular) before ordering.
• Deck size: Works with 42”, 48”, and 54” decks on these models.
• What to check: Verify your original switch has 2 or 3 terminals (this upgrade switch typically fits both, but confirm terminal count matches your wiring harness). Measure the switch hole diameter (standard 1.125” or 1.25”) to ensure a snug fit.

Key Things to Know

• Installation difficulty: Easy—disconnect battery, remove old switch (usually two screws), unplug wiring, plug in new switch, and reinstall. No special tools needed.
• Quality: Aftermarket; reported to feel slightly lighter than OEM but works reliably. Some users note the plastic housing is less robust—handle with care during installation.
• Common gotcha: The switch may click differently than OEM when pressed. This is normal and does not affect function.
• Warranty: Typically 90-day limited; check seller’s return policy before buying.

Should You Buy It

If your S100-series tractor’s PTO switch is worn, sticking, or dead, this $17 upgrade is a practical, budget-friendly fix. It’s best for DIY owners who want a direct replacement without paying $40+ for OEM. Skip it if you need a heavy-duty switch for commercial use or if your tractor has a different connector type—verify fitment first.