Finding the perfect brushless motor is essential for smooth sailing on the waves of excitement. Our experts advise selecting a motor size that matches the weight and dimensions of your hull. For single-motor RC electric boats, we've got you covered with these starting points: 28-29mm for hulls up to 600mm 36mm for up to around 800mm 40mm for up to 1200mm (light brushless motor or abs hull) 56-58mm for anything over 40mm.