The ROP Shop | Ignition Key Switch & Keys fits John Deere 300 312 314 316 317 400 Lawn Mowers

What It Is

The ROP Shop Ignition Key Switch & Keys is an aftermarket replacement part for the ignition system on John Deere 300, 312, 314, 316, 317, and 400 series lawn and garden tractors. It replaces a worn or broken key switch so you can start and stop the engine reliably.

Fitment & Compatibility

Before buying, confirm your tractor is one of these models: 300, 312, 314, 316, 317, or 400. This switch is not universal—it’s specific to these older John Deere series. Check your original switch’s connector type (blade or pin) and number of terminals (typically 5 or 6). Measure the panel hole diameter; this switch fits a standard 3/4-inch hole. It replaces OEM part numbers AM34287, AM37644, and AM102868. If your tractor uses a different switch design (e.g., 318 or 420 series), this won’t work.

Key Things to Know

• Quality vs. OEM: This is an aftermarket part, not genuine John Deere. The plastic housing and key feel may be slightly less robust, but it functions correctly for most users at a fraction of the OEM price.
• Installation difficulty: Easy—disconnect battery, unplug old switch, remove retaining nut, install new switch, reconnect wires. No wiring modifications needed if terminals match.
• Common gotcha: The included keys are metal, but some users report they can stick or feel loose in the cylinder. If you need a tighter fit, consider using original keys if they still work in the new switch.
• Returns: Check the seller’s return policy; electrical parts often have limited return windows.

Should You Buy It

Buy this if you have a compatible John Deere 300–400 series tractor and want a quick, low-cost fix for a dead or intermittent key switch. It’s ideal for budget-conscious owners who don’t mind a non-OEM part and can handle a 10-minute swap. If you prioritize long-term durability or need exact OEM feel, spend more on a genuine John Deere switch.