Boatnik, that is not a 6s motor, the max of 26v just means that is just the maximum the bearings are rated for. Please Ignore CraigP and dont run it on 6s. You have a decent mild 3s setup there, more powerfull and eficient than what it came with from the factory, I would guess you are along the right lines with a 40mm prop too. What brand and type of 40mm prop are you running? Surface drive props are prone to cavitating when running submerged, switching to a differnt prop the same size may help that. increasing diameter will help too, but that increases amp draw and heat too, so if you go bigger just run for 30 second then bring it in and check temps, if things are cool go a minute and check again, carry on, continuing to slowly add runtime to your testing untill you are getting a full run.
CraigP, advising a newbie to run 6s on a 28mm 2350KV motor is totaly irresponsible. That is someone asking for a reliable sport setup, and you are telling them to run 60,000rpm unloaded on 30A electrics! there isnt a prop that size available, and even if there was it would be a SAWs setup with a risk of smoke on every run, for a specialist lightweight boat not a plastic submerged drive RTR.
Paul Upton-Taylor, Greased Weasel Racing.
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