Method for adapting the composition of a mixture comprising fuel and combustion air, which mixture is supplied to a combustion chamber of a mixture-lubricated combustion engine in a work apparatus which is controlled by a user, - wherein at least a partial quantity of fuel is supplied to the combustion engine via an electromagnetically controlled fuel valve , - and, in an operating state (I) of the combustion engine , the supplied partial quantity of fuel is added in a metered manner by the electromagnetic fuel valve depending on operating parameters, wherein the composition of the mixture is adapted in a special operating state (II) which differs from the operating state (I) of the combustion engine , - wherein, for the purpose of initiating the special operating state (II), the combustion engine is initially started by the user, - wherein the combustion engine , after starting, is operated in a first rotational speed range (B) for a prespecified operating time (T min ), - wherein, after the prespecified operating time (T min ) has elapsed, the special operating state (II) for adapting the composition of the mixture is initiated by a user action, - wherein the composition of the mixture is adapted in a plurality of successive calibration steps , characterized in that a first calibration step serves to adjust the maximum power of the work apparatus , in that the user action causes an increase in the rotational speed of the combustion engine into a second rotational speed range (C, D), in that the second rotational speed range (C, D) lies above the first rotational speed range (B), in that the combustion engine is operated by the user under full throttle in the second rotational speed range (C, D), in that the combustion engine is operated in the second rotational speed range (C, D) in a load-free manner, in that , in a following second calibration step , the mixture is adapted at the maximum rotational speed (n max ) of the combustion engine , and in that the rotational speed (n ist ) of the combustion engine is increased to the maximum rotational speed (n max ) after successful completion of the first calibration step . - wherein at least a partial quantity of fuel is supplied to the combustion engine via an electromagnetically controlled fuel valve , - and, in an operating state (I) of the combustion engine , the supplied partial quantity of fuel is added in a metered manner by the electromagnetic fuel valve depending on operating parameters, wherein the composition of the mixture is adapted in a special operating state (II) which differs from the operating state (I) of the combustion engine , - wherein, for the purpose of initiating the special operating state (II), the combustion engine is initially started by the user, - wherein the combustion engine , after starting, is operated in a first rotational speed range (B) for a prespecified operating time (T min ), - wherein, after the prespecified operating time (T min ) has elapsed, the special operating state (II) for adapting the composition of the mixture is initiated by a user action, - wherein the composition of the mixture is adapted in a plurality of successive calibration steps , <EOS>