It makes sense to reset the carburetor on the lawnmower for a variety of reasons. After cleaning, when the engine stutters or runs roughly, the focus is on two adjustment screws. Familiarize yourself here with the correct procedure for optimally setting a lawn mower carburettor.

In order for the lawn mower to run well, everything must be clean

Preparatory work guarantees the best possible carburettor setting

If you are aiming for a perfect setting for the carburetor, we recommend the following measures for preparation. You will achieve the best possible result if all important components are clean and functioning properly. Before you turn your attention to the adjusting screws, proceed as follows:

  • Remove and blow out or wash the air filter
  • Pull the spark plug connector, unscrew the spark plug and clean all contacts
  • Check the choke for mobility and remove any dirt if necessary

Finally, open the fuel valve, which is located at the bottom of the fuel tank on most lawn mower models. Remove the line to inspect for and remove any blockages.

Adjustment Guide - How to properly adjust the carburetor

Once you have cleaned your lawn mower, check the petrol and oil levels, because the engine must be idling to adjust the carburetor. If necessary, please add petrol and oil. As a rule, lawn mowers have 2 adjusting screws on the carburetor: for the engine speed and the fuel-air mixture. The only tool you need is a screwdriver. How to adjust the carburetor correctly:

  • Place the lawnmower on a level surface and start it
  • Run the engine for about 5 minutes to normal operating temperature
  • Turn the engine speed screw so that the revolutions increase (engine becomes louder)
  • Adjust the fuel mixture screw so that the engine runs smoothly

The increased engine speed makes it easier to adjust the fuel supply and should be reversed afterwards. In the last step of the adjustment, unscrew this adjusting screw until the engine idles evenly. As a result, the engine becomes audibly quieter. Fine adjustment works best if you use a tachometer.

tips

When a lawnmower consistently refuses to start, the carburetor isn't always to blame. Dirty spark plugs and air filters often prevent a smooth start, as do a lack of fuel or a cutter bar blocked with wet grass.

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Garden design