How to Repair Weed Trimmers

Repairing a Weed Trimmer
Repairing a Weed Trimmer (Image: Weed image by Necroborg from

Weed trimmers provide the useful function of tiding up the appearance of lawns and removing the tops of a wide variety of weeds. While it is notable that although a weed wacker can be use to trim weeds to the same length of grass, this lawn tool cannot prevent weeds from sprouting up in the lawn. Oftentimes, weed trimmers scan become damaged from clipping over rocks or debris. In addition, it can also harm your weed trimmer when you improperly store the machine and allow it to rust. Repair your weed trimmer and get back to cleaning up the edges of the yard.

Things You'll Need

  • Weed trimmer manual
  • Spark plugs
  • Fuel
  • Fuel stabilizer
  • Garden hose
  • Liquid detergent
  • Metal brush
  • Towel
  • 80-grit sandpaper
  • Motor oil
  • Kerosene

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Engine that Will Not Start

Check to see if the switch is set to the "On" button. Many times gardeners will confuse "Off" with "On." Keep your manual on hand to identify parts.

Look at the spark plug to see if it has eroded or wet. The spark plug is located down the center insulator. If the spark plug is wet, replace the spark plug with one from a local hardware store or your weed trimmer manufacturer.

Examine the fuel supply. Weed trimmers should be drained of fuel at the end of the growing season. Replace the fuel in the spring. Fill your weed trimmer with a fuel stabilizer to keep it running smoothly through the season.

Start the engine and check if you smell fuel. A fuel smell emanating from the weed trimmer indicates that the engine has flooded. Set the weed trimmer down for 10 to 15 minutes before trying again. Take the weed trimmer to its manufacturer if the equipment continues to flood.

Rusted Weed Trimmer

Wash off the weed trimmer with a garden hose. Mix up one part liquid detergent and nine parts water in a bucket.

Scrub the weed trimmer with a metal brush to remove rust. Rinse off the weed trimmer and dry.

Sand the weed trimmer with a piece of 80-grit sandpaper. Wipe off the weed trimmer with a towel.

Pour two parts motor oil and one part kerosene on a rag. Rub the weed trimmer's blades with the mixture to prevent future rusting.

Tips & Warnings

  • Clean the weed trimmer after every use to prevent rusting and store in a dry location.
  • Refrain from trying to fix the weed trimmer when it is "On."


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