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How do you maintain a brush cutter?


A clean and tidy green garden or lawn always looks attractive. Brush cutters are great for trimming and shortening thickened grass in any season or weather. For gardeners, they are lightweight machines that are easy to use on grass and help landscaping your lawn. To ensure optimum results, your brush cutter needs to be thoroughly serviced regularly. Read this guide to learn how to maintain a brush cutter. Let’s get started.


Brush cutter maintenance tips

Regular and systematic maintenance after each brush cutter use will take little time and ensure comfort and safety for subsequent use. Do not hesitate to contact a professional for more complex interventions, such as engine or tool maintenance. Also, read the machine manual; once the machine is assembled, go ahead and oil the engine: the manual specifies the oil type and quantity.

used correctly every time

  • Always check and test the throttle trigger lock and throttle for proper function before using your brush cutter.

  • Make sure the handlebar fixing rod is tightened and fixed at the correct height for comfortable and optimized use.

  • Check and clean the outside of the machine such as the guard for any cracks or damage, and make sure the wiring harness is undamaged for your safety.

  • Ensure the mower nuts, bolts, and screws are tight, including the nuts holding the blade or disc housing.

Regular cleaning

About once a week (if you use your brushcutter a lot), cleaning the harder parts of your brushcutter, such as the cooling fins, the outside area of the carburetor, and the outside of the spark plugs, is essential. It is also encouraged to check that the air intake of the starter is not blocked and that the angle gear is three-quarters full of grease. If you follow these practices, your BISON brush cutter has a better chance of getting a longer life.

Wheel maintenance

The wheels and their mechanics are exposed and soiled with dirt, brush, and mowing residue. Cleaning must be done after each use. For inflatable wheels, check the pressure and re-inflate as needed.

Care of the grinding blade or mowing line

The blade is guaranteed to be cut and sharp to produce quality work.  Check blade tightness.  Remove the cutting blade, clean, and inspect for damage. Cracked blades must be replaced.  You can sharpen the cutting blade yourself with a whetstone if necessary.

Oil level check

It is crucial to check the engine oil level. Check the fluid level of the cutter before each use and after every 10 hours of operation. To do this, place the machine on level ground. Engine mounts must be level. The oil cap is located on the front of the engine and is also the oil level gauge. Unscrew the cap, remove and wipe the meter. The oil level must be between the low and high levels in the shaded area. The level must always be correct. If not, add oil for brush cutter engines.

Maintaining the brush cutter engine parts

Air filter maintenance

A dirty air filter can cause difficulty in engine starting, loss of power, poor function, and accelerated wear. The cleanliness of the air filter must always be maintained. Check the condition of the air filter after each use and, if necessary, clean it at least every 8-10 hours. Replace the filter element every 100 hours or when some defect occurs.

Depending on the engine, there are several types of air filters:

  • Foam air filter: Remove the filter element and wash it with gasoline. Then leave it in the sun to dry. Saturate with engine oil, then press firmly to distribute the oil evenly and remove excess oil. Please put it back in place, paying attention to the installation direction.

  • Dual element air filters: Remove the foam filter from the paper filter. Check both elements and replace them if damaged.

  • To clean the paper filter, tap the filter many times on a hard surface to remove dirt or blow compressed air from the inside (max. 2 bar). Do not use a brush to do this.


Check spark plugs

Remove the spark plug and look at its electrodes. If they are light brown, the spark plugs are fine. Spark plugs with electrodes of any other color must be cleaned or replaced. If it turns black, replace it. For spare parts specifications, carefully follow the brush cutter user and maintenance manual information.


fuel filter

Once a month, remove the fuel filter from the tank and replace it if damaged. We recommend replacing it annually or every 100 hours.


If you know you won't be using your brush cutter for a while and plan to store it, there are a few things you must do first to ensure it's still in good shape the next time you want to use it.

  • Start the engine - this will consume all the fuel in the fuel lines and carburetor. To empty the carburetor, start the engine with an empty tank and let it idle until the fuel is exhausted or released under the carburetor. 

  • Remove the spark plug and then pour a teaspoon of clean oil into the spark plug hole of the cylinder replacement spark plug.

  • Empty the fuel tank. Drain the entire fuel system by running the engine until it runs out of fuel. 

  • Lubricate the swivel axle on the front of the brushcutter.

  • The machine must be stored in a dry and ventilated place. It is best to hang the brush cutter for storage. It saves a lot of space because you can fold the handlebars to be easily hung in the garden shed.


detailed maintenance schedule for a brush cutter

EngineCheck fuel and oil levels; look for leaks.Clean the air filter.Change the engine oil.Check the spark plug; replace if necessary.Tune-up the engine; replace parts as needed.
BladeClean after use; check for damage.Sharpen if dull.Inspect for wear and tear.Deep clean; lubricate.Replace if worn out.
Fuel SystemEnsure proper flow of fuel.Check for any blockages in fuel lines.Clean the fuel tank.Inspect the carburetor; clean if needed.Replace fuel filter.
Handle & ControlsCheck for comfort and ease of use.Tighten any loose screws or bolts.Lubricate moving parts.Inspect for any damage; replace parts as needed.Full inspection and repair as needed.
Safety FeaturesTest safety features (e.g., blade guard).Ensure all safety labels are visible and legible.Check the condition of safety features.Repair or replace damaged safety features.Full safety inspection.


What is the fuel ratio of the brush cutter?

1:25 = 1 part oil + 25 parts petrol, or 40 ml of oil per liter of petrol when using other oil brands. Any two-stroke engine oil used in gasoline garden tools must have a TC classification.

in conclusion

Brush cutter maintenance may seem daunting at first, but with regular practice, it becomes a simple task. By following the steps mentioned in the BISON blog post, you can ensure that it is well maintained and lasts longer.

Plus choosing the right tool, like a BISON brush cutter, can dramatically improve your lawn maintenance experience. BISON's durability, efficiency and economy make it the first choice for a long-lasting and great turf experience. Remember, a well-maintained brush cutter equals a well-maintained lawn. Happy mowing!

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I am a dedicated and enthusiastic salesperson from BISON, and I am here to share my vast experience. Enabling you to receive our expert advice and unparalleled customer service.

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