Originally Posted by Swampdawg67

It was working ages ago but it keeps cooking batteries. I left it for a few years. Only change now was a 3660 size 3500kv from a 3050kv. Tried 7.4 to 11.1v various mah and C rating. All puffed up bad plus very hot. It's a R2 marine kit pre installed shaft etc. Just like to know where it's going wrong and a possible suggested set up to try from. The original set up was my own pick of parts based on searching and reading. So it was by no means correct in the first place