I picked up a slightly used, but abused Widow Maker. My very first R/C boat. So the ESC, servo and receiver were all shorted out(he sunk it on it's first run) I put in a Mamba Max esc and a Hitek servo, I had laying around, along with a Spekturm rx. Once I got everything all sorted out I threw in a 2cell 5000mha LiPo and headed to my pond. Woo this thing is cool. After 2 or 3 min I brought it in and everything seemed good, so I thought I should try a 3cell. It was a huge improvement, for about 35 seconds and the prop blew off. So while I am waiting for my new props, is it OK to run a Mamba Max in a boat?? And does it need to be water cooled?????