Castle Marine ESCs & Cooling Accessories

Castle’s legacy of overpowering the surface doesn’t stop at land — it goes full throttle into water. Our Marine Product lineup is purpose-built for high-performance RC boats that demand brutal torque, thermal control, and bulletproof reliability. From the proven Hydra X8S to the next-generation Hydra Cobra 5, these ESCs are 8S-capable and designed for high-RPM water-cooled action.

Pair your ESC with our precision-machined 15 Series Water Jacket for maximum heat dissipation and consistent performance during long pulls and hard turns. Whether you're racing, bashing, or building a custom watercraft, Castle’s marine gear is ready to make waves.