[steamer]

Joe. The excavator looks great and I'm glad see the first one in use. This pump trouble your having is from lack of amperage to the motor. Brushless motors are power hogs and realy don't care so much about voltage but require lots of amps. The esc on that thing will handle 125 amp and the max you can carry on 14 Ga. wire is 15 so it's starving the motor big time. If you really want to see it perform try using a set of jumper cables and you'll be able to dig in solid rock. The info for the model looks like it needs a 6500 ma 11.1 volt lipo battery. Just trying to help before you may hurt the motor.
Rob