Finish Thompson model M39 drum pump motors are compatible with the following Finish Thompson series drum pumps: BT. Model M39 totally enclosed fan cooled (TEFC) motor has an output of 0.75 kilo watts, 50 Hz, 220/380/440 Volts, three phase, 3.4/2/1.7 full load ampere rating (FLA), 2,850 RPM and a maximum viscosity of 1,000 cP.