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I would want to start with a graupner k42, the an octura x642 on 2s with the leopard 3674 3300. I am not sure that size boat will take a m545. The aquacraft 1800kv or the 2030 kV on 4s with a k42 could be another setup with good runtime but it might over kill a lil boat 23 to 25 inches. You probably could run the aqua craft motor on 3s. The aqua craft will take prop in the 45mm range but since we talking 23 to 25 inches an m435 3blade, the octura x438, the x437 3 blade would work well with the aqua craft while running 4s and the runtime will be much better than the 3300 leopard.
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I pulled the motor I have out of the drawer and immediately realized it wasn't the Castle I thought I had. I had sold one but I had bought 2 new motors and off memory thought I had bought two of the same. Going back through 9-year old emails it's a Medusa 4800kv. Going to try a smaller prop first, probably in he 37-38 range, and go from there. If the setup doesn't run good I'll either try a smaller or larger prop or switch altogether to a 4s setup. I'm using an old Hydra 120 so hopefully that esc allows for some flexibility. ThanksComment
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That setup will pull big amps.I would try it though. A prop more like 35mm is what I would have in mind for that kV.Comment
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