925-3164A Lawn Mower Interlock Switch for Craftsman Husqvarna Snapper Lawn Mowers Replaces Parts 153664 22182 176138 – Lawn Mower Limit Safety Switch-2 Pack Review

Overview

The 925-3164A Lawn Mower Interlock Switch is a replacement safety component designed for Craftsman, Husqvarna, and Snapper walk-behind mowers. This two-pack of limit safety switches ensures your mower’s blade stops when you release the handle—a critical safety feature. It’s best for DIY homeowners who own compatible mowers and want to restore proper safety function without paying a dealer for labor.

Who Should Buy This

1. Homeowners with dead or intermittent safety switches – If your mower won’t start, or the blade keeps running when you let go of the handle, this switch is your fix. It’s a direct replacement for common part numbers 153664, 22182, and 176138.

2. Owners of Craftsman, Husqvarna, or Snapper mowers from the 2000s – These brands share similar interlock switch designs, and this two-pack covers most models with a dead-man’s lever. Check your mower’s part number to confirm.

3. Budget-conscious DIYers – At $16.99 for two switches, you’re saving roughly 40% compared to buying singles from a dealer. Plus, you get a spare for future use.

4. Frustrated with mower shutdowns – If your mower dies when you hit a bump or turn sharply, the switch may be failing. This replacement restores reliable contact.

Key Features Breakdown

• Replaces Multiple Part Numbers – Fits Craftsman 925-3164A, Husqvarna 153664, Snapper 22182, and 176138. This cross-compatibility saves you hunting for an exact match.

• Limit Safety Switch Design – It’s a mechanical switch that opens or closes a circuit when the handle is released. Simple, durable, and easy to test with a multimeter.

• Two-Pack – You get two switches for the price of one and a half. Use one now, keep the other for a backup or a second mower. Smart for anyone with multiple machines.

• Plastic Housing with Metal Contacts – The housing is tough enough for lawn debris, and the contacts are corrosion-resistant. Expect 3–5 years of typical use before replacement.

• Screw-On Mounting – Two small screws hold it in place (included with some mowers, but you may reuse originals). No special tools needed—just a screwdriver.

Pros

1. Restores safety function – The switch ensures the blade stops within seconds of releasing the handle. Critical for preventing accidents with kids or pets nearby.

2. Easy DIY install – Remove two screws, swap the old switch, reconnect the wires (usually spade connectors), and test. Takes about 10 minutes.

3. Cost-effective two-pack – At $8.50 per switch, you’re paying less than half of most dealer prices. Perfect if you have two mowers or want a spare.

4. Wide compatibility – Works with dozens of Craftsman, Husqvarna, and Snapper models from the 2000s–2010s. Check your mower’s part number, but odds are good it fits.

5. Reliable performance – Most users report the switch works immediately after install, with no intermittent failures or loose connections. Consistent contact is key.

6. No special tools – A Phillips screwdriver and maybe a small flathead for prying off old wires are all you need. No soldering or crimping required.

Cons

1. Not universal – Some newer Craftsman or Husqvarna models use a different switch design. Double-check your mower’s part number before ordering. Returns are a hassle.

2. Plastic can crack if overtightened – The screw holes are plastic. Use gentle pressure when installing, or you might strip the threads. Hand-tighten only.

3. Wires may need trimming – The included wire leads are about 4 inches long. If your mower’s wiring harness is far away, you’ll need to splice in extensions. Not a dealbreaker, but worth noting.

4. No installation guide included – The switch comes in a plain bag with no instructions. If you’re not comfortable with basic wiring, watch a YouTube video first. Most users figure it out, but it’s not plug-and-play for everyone.

Bottom Line

The 925-3164A two-pack is a solid, affordable fix for a common safety issue on Craftsman, Husqvarna, and Snapper mowers. If your mower won’t start, the blade won’t stop, or you’re dealing with intermittent stalling, this switch likely solves it. The price is right, the install is simple, and having a spare is a nice bonus. Just confirm your mower’s part number before buying, and don’t overtighten the screws. For the DIY homeowner who wants to keep a reliable mower running safely, this is a no-brainer purchase.

Frequently Asked Questions

Q: Will this switch work on my Husqvarna mower if the part number is slightly different?
A: It depends. The 925-3164A replaces 153664, 22182, and 176138 directly. If your mower uses a different number but has the same two-wire, normally-open design, it might still work. Measure the distance between mounting holes (about 1.5 inches) and check the wire configuration. When in doubt, compare photos of your old switch.

Q: How do I test if the old switch is bad?
A: Use a multimeter set to continuity (ohms). Disconnect the switch, touch the probes to the two terminals. When the plunger is pressed (simulating the handle engaged), you should get a reading near zero ohms. When released, it should show infinite resistance (open circuit). If it doesn’t change, the switch is dead.

Q: Can I bypass this switch to make my mower run without the safety feature?
A: Technically yes, but don’t. Bypassing the interlock switch disables the blade brake, which is dangerous. If you accidentally release the handle, the blade keeps spinning—a serious injury risk. Replace it properly. If you’re tempted to bypass, consider that it’s also a fire hazard if the engine runs without the brake engaged.