Hello, I have a problem with burning up speed controllers with Neu 1506 1y motor. I have a Castle Hydra 120 that after 4 minutes of running with 2 Nimh 3800 batteries in parrallel overheats the controller. The boat is a hydro marine viper using a octura x632 prop. I sent the motor back neutronics and they have tested it and found no problems with the motor. I use 2 water pickups 1 off the rudder and 1 off prop blast and have no restrictions in the water lines. I need some advise, Thanks!