Abstract: Disclosed is a bracket providing a housing through which a vertical shaft extends, the shaft being journalled for rotation in bearings carried by the housing. The lower end of the shaft extends into driving relation with a well pump from which the conventional electrical drive motor has been removed. Arms extending sidewardly from the housing are adapted to support an internal combustion engine having a vertical output shaft. A belt and pulley drive connect the output shaft and the pump drive shaft, with the belt extending within the space bounded by the sidewardly extending arms.