I measured the 6 and half minutes runtime with a gps in the boat, using moving time. And thank you for responding. With that prop and that motor I would have gotten 3 minutes runtime at wide open throttle to consumer 2400 mah. Have said that I can see why the ul-1 motor seems to not hold up for you guys. The motor can may not be that hot, but the motor winding does get really hot, and in my experience it would melt the solder in a short space of time off the motor connectors or the ones on the esc going to the motors, then the wire would separate from the connector and the boat would stop dead in the water and your motor would not work. It would be like when you pull the throttle it would spin very slow if it spins at all. This has happen to me many times, all that happen is one of the motor wires may have broken contact with the connector or the speed control wire may have broken contact with one of the connectors.