Hi Rob,
that's a bit of a problem...
You don't currently stock cost effective kit... and the other suppliers are too expensive for me to have sampled their wares...
so I have a number of boats with various mabuchi motors in various states of abuse... waiting for cost effective options to become available...
I do have a hankering to try a waterjet boat... just don't like the cost of a graupner waterjet unit... don't know if there is an alternative on the market.
Back to motors. I see motors like the water cooled inrunner picture attached, and wonder just what's water cooled about it...
from the pictureds it looks like half of the can is water cooled and somehow the rear bearing housing is watercooled... but the coil wiring comes through the watercooling... looks really odd...
(EBAY item 390108610600)

- WC Inrunner
- 2100KV_Water Cooled.jpg (10.58 KB) Viewed 531 times
This Blue motor looks more understandable...
cant findit at the moment but I have seen a motor mount similar to this, that was water cooled, for use with outrunners

- motor mount.jpg (4.62 KB) Viewed 533 times
ebay 360250815967
here's one
http://www.offshoreelectrics.com/prodde ... =ose-80230

- Water mount.jpg (9.53 KB) Viewed 531 times