Replacement Lawn Mower Blade Brake Ignition Switch 117-5975 Fits 10605 10658 20047 20658 20976 21199 etc 22" & 30" Mowers

What It Is

This is a replacement blade brake ignition switch (part 117-5975) for walk-behind mowers—it kills the engine when the blade brake is released, acting as a safety interlock. It’s designed for select Craftsman, Husqvarna, and other-brand 22" and 30" mowers.

Fitment & Compatibility

Before buying, verify your mower’s model number against the listed fits: 10605, 10658, 20047, 20658, 20976, 21199, and others in that series. This switch is a direct OEM replacement for Craftsman/Husqvarna part 117-5975. Check the switch body shape—it has a rectangular housing with two spade terminals. Measure the mounting hole spacing (roughly 1.5" center-to-center) and the plunger length (around 0.75"). It only works with mowers that have a blade brake cable (not electric start or battery-powered models). If your mower deck is 22" or 30" and uses a cable-operated blade brake, this likely fits.

Key Things to Know

• Quality: Aftermarket but well-reviewed (4.8 stars); it’s a simple mechanical switch—no electronics to fail.
• Installation: Easy swap—unplug the old switch, remove one screw, install the new one, and reconnect the wire leads. No special tools needed.
• Common gotcha: The plunger must align with the blade brake lever; if the lever is bent or worn, the switch won’t engage properly—inspect the lever before buying.
• Fitment nuance: Not compatible with mowers with a separate ignition key or push-button start—only those with a blade brake cable.

Should You Buy It

If your mower is in the listed model range and you need a reliable, low-cost fix for a failed safety switch, this is a solid choice. It’s easy to install and has strong user feedback. Avoid if your mower uses a different switch shape or has an electric start system.