Ready to mow, but your Black and Decker lawn mower won’t turn on—no click, no hum, just silence? Don’t worry! Most Black & Decker electric and battery mowers are easy to diagnose and fix at home. Here’s how to quickly troubleshoot and get your mower running again, step by step.
Quick Picks: Most Common Reasons a Black & Decker Mower Won’t Turn On
- Dead or Disconnected Battery: Battery-powered mowers won’t start if the battery is discharged, not seated, or has a loose connection.
- Tripped Breaker or No Power at Outlet (Corded): If using a corded model, the outlet may be dead or the breaker tripped.
- Faulty Power Cord or Extension Cord: A cut, frayed, or damaged cord can stop power flow completely.
- Safety Key Missing: Many Black & Decker models use a removable safety key—without it, the mower will not turn on.
- Handle Lever or Bail Bar Not Fully Engaged: The “dead man’s” lever (bar you hold down to mow) must be fully pressed for the mower to operate.
- Faulty Start Switch: The start button or lever can wear out over time.
- Obstructed Blade or Deck: Grass, debris, or sticks can jam the blade and prevent the motor from running.
- Internal Fuse or Overload Protection: Some models have a fuse or reset button that may need attention if overloaded.
Buyer’s Guide: What to Check & What You Might Need
- Fully charged battery (or spare, for battery models)
- Heavy-duty extension cord (for corded models, rated for outdoor use)
- Multimeter or outlet tester (to check for power)
- Replacement start switch or safety key
- Small screwdriver (for battery contacts or switch access)
- Work gloves (when inspecting under the deck or blade)
Step-by-Step: How to Fix a Black & Decker Mower That Won’t Turn On
1. Check Battery and Connections (Battery Models)
- Ensure the battery is fully charged. Try a second battery if available.
- Remove and reseat the battery—make sure it “clicks” into place securely.
- Clean the battery contacts if dirty or corroded.
- If the battery shows no lights or won’t charge, replace it with a new one.
2. Confirm Power Supply and Cords (Corded Models)
- Plug another device (lamp or tool) into your outlet to verify it’s working.
- Check and reset your circuit breaker or replace a blown fuse if needed.
- Inspect your extension cord for cuts, damage, or loose connections—replace if worn.
3. Insert the Safety Key
- Find the removable safety key—usually orange or red plastic—and insert it fully into the slot near the handle or battery bay.
- No key, no start! Order a replacement if lost.
4. Engage the Handle Lever/Bail Bar
- Hold down the bail bar or handle lever completely before pressing the start button or pulling the trigger.
- If the lever feels loose or doesn’t click, the safety switch inside may be faulty or disconnected.
5. Inspect the Start Switch
- If all other steps check out, the start button or trigger switch may have failed.
- Test with a multimeter for continuity, or consult a technician for replacement.
6. Check the Blade and Deck for Obstructions
- Unplug or remove the battery before inspecting underneath!
- Clear any grass, sticks, or debris that could jam the blade.
- Spin the blade by hand (wear gloves)—it should move freely.
7. Look for Fuse or Reset Button
- Some Black & Decker models have a built-in fuse or resettable overload button near the battery compartment or motor. Press to reset if tripped.
Comparison Table: Black & Decker Mower Won’t Start – Causes & Solutions
| Problem | Solution | Difficulty | Parts Needed |
|---|---|---|---|
| Dead Battery | Charge or replace battery | Easy | Battery |
| No Power at Outlet | Reset breaker/fuse | Easy | — |
| Bad Power Cord | Replace cord | Easy | Extension cord |
| Missing Safety Key | Insert or replace key | Easy | Safety key |
| Handle Lever Not Engaged | Press/repair lever | Easy-Medium | Lever, switch |
| Faulty Start Switch | Test/replace switch | Medium | Switch |
| Blade Jammed | Clear obstruction | Easy | — |
| Tripped Internal Fuse | Reset/replace fuse | Easy | Fuse |
Frequently Asked Questions
Why does my Black & Decker mower click but not run?
This usually means a weak battery, dirty contacts, or a jammed blade. Check each and try again.
How do I know if my battery is dead or faulty?
If the charger shows an error or the battery won’t hold a charge or power any tool, it likely needs replacement.
What should I do if my safety key is missing?
Order a replacement from Black & Decker or an authorized dealer. The mower will not work without it.
Can I replace the start switch myself?
If you’re handy, yes—just be sure to disconnect all power before working on the electrical system. If unsure, get help from a repair shop.
Conclusion
If your Black and Decker lawn mower won’t turn on, check power, battery, safety key, handle lever, and clear the blade. Most issues are quick to fix and will have you mowing again in minutes. Regular maintenance and proper storage keep your mower reliable all season long!