I don't have a clue what make or model the boat is it's at least 25 years old and I have no idea how I'd go about finding a model for it. The original motor was a nitro HP .40 that I didn't even want to mess with so I bought the electrics.

I bought this 125a Hobby King ESC and this 2300kv motor. I actually used this 2560kv motor when Itested it this weekend, though (long story, but it's not watercooled and got pretty warm so I won't be sticking with it, I'll use the first one). The 2300kv I'll be using is only rated for 11v, the ESC for 7S. I'll probably end up wanting to upgrade the motor, but I have a couple other issues I want to solve first.

Idid finally get the boat out on the water over the weekend, with the 2560kv motor. It was quite a bit faster than I expected using a single 2S 40C lipo, but Idid have a couple problems.

1)Since the motor Iwas using wasn't water cooled, I obviously had my water lines running through just the ESC. It didn't get any water at all. I did buy larger diameter fuel line yesterday, but I would have expected to get at least SOMETHING.. There's a single copper pickup tube in the back. There are no clogs or kinks. No idea what I need to get enough (or any) water to my ESC..?

2) The prop is cavitating a lot. It has no problem getting up on plane but as soon as it does it cavitates. The prop is bigger than was recommended above as I wanted to get a baseline, about 55mm. No idea what the pitch is, but this IS a prop that was originally chosen for the nitro motor, and it's plastic. I ordered a few different sizes, 35, 45 and 50mm, to try out. I also lowered the prop about 1/4" but can't go any further without making modifications and didn't want to do it until someone told me that makes sense.