I've got my twin motors ,540s and a 30 amp esc for twin motors installed into a hull and when testing in the bath they seem to stall. When first initialising the esc beeps an light flash, which I think is normal but when opening the throttle the motors speed up then stop dead, the esc starts flashing and a long tune starts playing then stops and the motors start to respond again. The battery is a 7.2 v nmh 4000amh. Just tickling the throttle it works quite happily but very slowly.

Could it be the esc underrated or the diodes or caps I fitted across the motor terminals giving trouble and causing a short circuit ?

Any suggestions on how to cure this problem will be most welcome

Thanks