That makes total sense and also explains why the power was reduced from the get go with that battery pack. I'll know for sure when I run the boat again with the good pack.

I mentioned in my original post that the boat was not noticeably faster with the new 23 turn motor. However, I now realize that it was running with the nose low with more of the forward part of the hull dragging in the water. This is because the new motor is lighter than the old so the weight distribution has changed. When I make some adjustments to get the trim right I should get significantly more speed.

I have an Octura X430 prop that I'm going to try on it. I need to sharpen and balance it first though. I'll let you know how that turns out.