Productivity of electromagnetic atomizers (EMA) of gasoline engines has been defined. It is established that EMA productivity removed from engine with an operating time of 30-60 thousand km, as well as new atomizers after their washing by ultrasound can change both productivity growth and its decrease. It is shown that the content of PCO and CH in the exhaust gases of car GAZ-27040 V (run of 30 thousand km) at engine work (on idling turns) with washed MA is below concentration of the specified toxic components in exhaust gases of the motor completed by unwashed ultrasound EMA It is established that the difference in compared values of capacity and a torque, obtained in testing on dynamometric stand (subroutine Pmax, for the EMA engine before processing by ultrasound) is not significant. In the tests conducted in subroutine Vconst, the gain of capacity of the EMA engine washed out by ultrasound has been 0.04 MJ•km-1 (1.71 %). © Published under licence by IOP Publishing Ltd.