The GY20680 Master Mower Key – One Key for the Whole Shed

Lost the key to the ride-on and the grass is growing faster than a weed in a rainy week? The GY20680 (also known as the AM131946) is the universal soldier of the lawn care world. Designed for John Deere, but widely used across Cub Cadet, Husqvarna, and MTD machines, it’s the most common key you’ll ever need.

Why You Need This (Aside from Keeping the Missus Happy)

• Universal Compatibility: Fits John Deere 100 series, D-series, E-series, and even some X-series tractors.
• Multi-Brand Magic: Not just for the Green and Yellow—this also fits many Cub Cadet, Toro, Murray, and Husqvarna mowers.
• Solid & Reliable: Simple, all-metal construction with a plastic-moulded head for a better grip when the morning dew makes everything slippery.

Compatible Equipment

This key is a confirmed fit for a massive range of mowers, including:

• John Deere: 102, 115, 125, 135, 145, 155C, D100, D110, D130, D140, E100, L100, L110, LA100, LA120, X300, X320, X500, and many more.
• Cub Cadet: Many LTX and RZT series riders.
• Husqvarna: Fits several Husqvarna riders and tractors.
• Other Brands: Also fits selected Toro, MTD, Murray, Poulan, and Craftsman models.

Technical Specs

• Part Number: GY20680 / AM131946 / AM135345 / M153650
• Design: Standard 2-prong mower ignition profile.
• Application: Ignition Starter Switch.

Pro Tip: These keys are notorious for falling out while you're mowing the back paddock. Grab a couple of spares so you're not searching through the grass clippings for three hours!