Getting shocked by your lawn mower while mowing the grass is an unpleasant and potentially dangerous experience. However, there are several steps you can take to prevent electric shocks from occurring.
Check the Engine and Blades
The engine and rotating blades underneath the mower deck are common sources of electric shocks. Here is how to inspect these components:
Inspect the Spark Plug
The spark plug provides the high voltage needed to ignite the fuel and start the engine. A cracked or worn spark plug can allow electricity to arc to the metal frame.
- Carefully remove the spark plug and examine it for cracks or excessive wear. Replace it if needed.
- Be sure to reinstall the plug securely so it does not vibrate loose.
Check the Blade Mounts
Electricity can jump from improperly grounded blades to the mower handle.
- Remove accumulated grass clippings from under the deck to access the blades.
- Tighten any loose blade bolts to ensure proper electrical grounding through the mounts.
- Replace damaged or severely worn blades since they can also contribute to electric shocks.
Evaluate the Electrical Wiring
Faulty wiring that has become exposed or disconnected can energize the mower's metal frame and cause shocks.
Inspect the Battery Cables
- Check both battery cable connections to make sure they are tight and free of corrosion.
- Replace damaged cables like those with cracked or frayed insulation.
Look for Loose Wiring
- Visually inspect wiring harnesses for any loose, disconnected, or cut wires.
- Electrical tape can be used to insulate exposed wires, but damaged wires should be replaced.
Check for Corroded Connections
- Remove cardboard debris clogging the engine compartment and clean any green corrosion from electrical terminals using sandpaper or steel wool.
Evaluate the Safety Systems
Specialized safety systems help prevent electricity from reaching the mower handle.
Examine the Kill Switch
- The kill switch disables the ignition when the handle bail is released.
- Test it is functioning properly by releasing the bail with the engine running to verify it stops.
Inspect the Ground Fault Module
- This safety device detects electricity leaking from the wiring and cuts power to stop shocks.
- Consult your owner’s manual on how to test the module by pressing a button or switch. Replace if defective.
Check the Rubber Hand Grips
- Cracked or dried rubber hand grips can allow shocks to reach your hands.
- Replace hand grips that are deteriorated, hardened, or no longer flexible.
Isolate Your Body from Electrical Current
You can take steps to prevent shocks from reaching your body when operating the mower:
Wear Thick Rubber Soled Shoes
- Thick rubber soled shoes or boots will insulate you from the ground. Avoid thin soled sneakers.
Keep Hands Away from Metal Parts
- Grasp only the plastic or rubberized handles while mowing.
- Avoid contacting any bare metal parts on the mower if you feel a shock.
Keep the Grass and Deck Dry
- Avoid mowing in wet grass, which conducts electricity to the deck.
- Dry any standing water from under the deck before mowing.
By thoroughly inspecting your mower and taking precautions, you can stop electric shocks before they happen. Properly maintaining the engine, blades, and safety systems while insulating your body are the keys to safe, shock-free lawn mowing.