Strimmer Not Working? Common Fixes

Troubleshooting your strimmer

May 16, 2024 | 10 min read
Gardener fixing a strimmer in a green garden

As a professional gardener with over 15 years under my belt here in Staffordshire, I've encountered my fair share of strimmers that have decided to take a day off just when they're needed most. The British climate can be unpredictable, and whether you're tidying up in spring or taming a summer jungle, a well-functioning strimmer is essential. Let's dive into some common issues and fixes that might just save your day.

Quick Answer

If your strimmer isn't working, check the power source first, inspect the line for tangles or breaks, and ensure the air filter is clean. These quick checks often resolve common issues.

Check the Power Source

One of the first things I always advise is to check the power source. Whether it's petrol or electric, the power supply is often the culprit. For electric models, ensure the plug is firmly connected, the cable isn't damaged, and the fuse hasn't blown. For petrol strimmers, ensure there's enough fuel and it's fresh. Old petrol can cause problems in starting your machine.

Inspect the Line

The cutting line can often be the source of trouble. If the line is broken, tangled, or worn down, it won't cut efficiently. Make sure to replace the line with the correct diameter for your strimmer—usually 1.5 mm to 2.4 mm in the UK. Regularly check the spool for tangles and re-thread it if necessary.

Line Replacement Tips

  • Keep extra line spools on hand to avoid interruptions.
  • Follow the manufacturer's instructions for re-threading.
  • Store line spools in a cool, dry place to prevent them from becoming brittle.

Clean the Air Filter

A clogged air filter can hinder performance, especially in petrol models. Ideally, clean the filter after every 10 hours of use. In the Midlands, pollen and dust can quickly clog filters during high summer, so frequent checks are essential. Simply remove the filter, gently wash it with soapy water, and let it dry completely before reinserting.

Check the Spark Plug

If your petrol strimmer still refuses to start, the spark plug might need attention. Inspect it for signs of wear or carbon build-up. A good rule of thumb is to replace the spark plug at the start of each season to ensure reliability throughout the year.

Maintenance Schedule

Task Frequency Notes
Check and replace line Every use Varies based on usage
Clean air filter Every 10 hours More often in dusty conditions
Replace spark plug Annually Start of the season

Frequently Asked Questions

Why won't my electric strimmer start?

Ensure the power cable is intact, the plug is correctly inserted, and the fuse in the plug is functional. If these are all fine, the switch or motor might need professional attention.

How do I restring my strimmer?

To restring, remove the spool from the head, cut a length of line (usually about 5 metres), and follow the arrow directions on the spool to wind the new line. Secure it in the notches and reassemble.

Can I use any type of line in my strimmer?

It's best to use the line diameter recommended by the manufacturer. Using the wrong size can lead to performance issues or damage to the strimmer.

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