Some time back when I was unable to find another Turnigy 3648-1450 out-runner, Harry suggested that I should try an in-runner for a change and reckoned that the Surpass 3674-2250KV would be a good substitute - and maybe even more powerful.
I have never had an in-runner in a power-boat before and noticed that most to those that seemed to be in the sort of power range that I was looking for were primarily aimed at model cars (and claimed to be water-proof) so I was happy to give Harrys recommendation a try and sent away for one.
Whilst peering through the Bangood site I noticed some water-cooling jackets to fit the 3674 series motors that were anodised in a nice orange/red colour and for less than a fiver each I just had try one.
The motors arrived weeks ago - but the water-cooling jacket to fit it only arrived today! The water jacket was not too keen to "slide" onto the motor body so I wiped some Vaseline (petroleum jelly) around the "O" rings and found the jacket was then possible to fit it and rotate the water nipple to a position that would best suite the installation in my hulls.
The motor will fit on my standard alloy water-cooled motor mounts so it is another motor that I can swap and change - water-cool - or run dry without any water cooling.
With the water-cooling fully connected up I can run the water through the ESC, on to the front motor bearing, and finally around the moor casing before being pumped out through the hull side.
With the motor fitted onto the alloy water-cooled motor mount I soldered my favourite 6mm gold plugs onto the leads so the motor is now ready to go!
I may give it a run in my Rapier so I have a direct comparison with the performance I have seen from the Turnigy 3648-1450 in the same hull. I hope it will be at least as powerful - or better