I went back to the Springer thread on RC Groups and the types of motors vary,but have to run on 6 volt.A brushed 540 car type motor,also known as an 05 and 27 turns ,geared at 3:1.A minimum 15 to 20 amp speed control and a 2 battery pack power supply is most common.The maximum regulation size is 8" wide x 18" long.Looking for an ESC and brushed motor match,because of the lower price factor.Can set up a gas powered boat, but am just a nube to electric.