newby in electric boats i run in gas but i have seen some art piece that call my atention so
im planning to get 2 dirty cheap 540 can motors with a 40 amps ESC (is that overkill or not enough???)

with 2 packs of NIMH 1600mah at 8.4 volt.

all this to a Outrigger Hydro (mostly foam to be light)


my questions are
im planning to put the motor direct drive no by gearbox (which prop size should i pick????? (i was thincking 40mm)
8.4 volt ar good or go higher volt or lower?????

thxs in advance