Warrior 9918 Brushless Car Controller in a BOAT ?

[RC-Monster Mike]

The 8s (and especially the 6s) is overtaxed on 12 cells. The 8s and 6s will both do very well on 6 cells, but for 12 cells, you would need something else (the 4200xl motor you mentioned before would be quite a performer on 12 cells). I have a used 4200xl motor I may part with if you need it in a hurry.