If a lawn mower stutters, runs rough and smokes, the carburettor setting is usually no longer correct. Fortunately, common petrol mowers are designed in such a way that you can regulate the carburetor yourself. These instructions explain step by step how to set up your lawn mower perfectly.

The carburetor is very easy to adjust

Adjusting the carburettor - This is how it works in 4 steps

Commercially available petrol-powered lawn mowers are equipped with 2 adjusting screws. A screw with a spring regulates the speed of the engine when idling. You set the fuel quantity or the desired mixture with a second screw. The manufacturer's manual tells you where the screws are on your lawnmower model. How to do it right:

  • Start the lawnmower and let it run for a few minutes
  • Screw in the spring-loaded adjusting screw to increase the engine speed
  • Then adjust the fuel adjustment screw so that the engine runs smoothly
  • Finally reverse the increase in engine speed by slightly unscrewing the spring screw

On many lawn mowers, you cannot access the carburetor adjustment screws until you have removed the air filter. You should use this opportunity to clean the filter. If deposits get stuck here, the engine sputters, although the carburetor is set correctly.

The carburetor is not always to blame - tips for setting the cutting height

Incorrect settings on the carburetor are not always the cause of engine problems on petrol lawn mowers. When you mow a wet lawn, clumps of grass get stuck in the cutter bar. The more grass that accumulates, the rougher the engine runs. Eventually the engine stops completely because the blades are jammed. It doesn't have to come to that.

If it is absolutely necessary to mow the lawn when it is wet, set the cutting height to the maximum. As a rule, there is a lever for the adjustment on each of the four wheels. At the highest possible cutting height, the risk of the cutter bar becoming blocked by wet clippings is demonstrably reduced.

tips

If you do not achieve the desired result with a new adjustment on the carburetor, dirt, grease and deposits are causing the engine problem. Remove the carburetor as recommended in the manufacturer's manual. Clean the component with benzine or in an ultrasonic bath, insert it and make the settings explained here.

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Garden design