running an external bec takes some load off the esc and lowers the temps. Think of it this way, you have more voltage coming in than going out so you have to step it down some way or another...that builds more heat. Anyway, on boats 26" and above (just my own rule) i always use a external bec. You disconnect the red wire in the receiver plug from the esc to the receiver then plug the bec power into the empty slot or bind slot.
32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was
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