You will find that motor couplers are hard to come by in 3 mm bore. There are many similar (and sometimes even cheaper) motors that have either a 2.3 mm, 3.2 mm (1/8"), or 4 mm shaft. Couplers for this size motor are easier to come by.
That motor should work well in a Hydromite. I've been using 3000 rpm/V outrunners on 2S in little hulls like the Hydromite and they work well with a 29 mm prop. I am about to try a 3850 rpm/V motor in my lastet micro hull.
I watched his auctions and picked up this exact motor PLUS a 30A ESC for about $25 shipped. If you are not in an immediate rush for a power system, it pays to wait for an opportunity to be an ebay sniper.
it was shipped all the way from Hong Kong to the USA in less than two weeks and for less than $25.
I plan on using it in my hydromite when it finally gets built. It's getting there, but very very slowly!
This is a great deal and in fact, the "spec" motor for SSSH racing. It is a drop-in replacement for the 3850 Kv motor I mentioned above; or perhaps it would be better to say the motor above is a drop-in replacement for this motor.
There are a couple of guys on this site that make couplers. Look for Jeff Wholt and/or Ned Schmidt (not 100% sure of the spelling). I think either one may be able to help you.
Drilling never works well; the hole is never precise enough. I like to ream them to the final bore.
With the 3000 rpm/V motor, cells in the 1250~1500 mah range (20C) work well. With higher Kv motors like you mention, 1500~1900 mah (20C or more) would be my choice.
Have you tried the 3850kv motor yet? I was wondering if the 30 amp mystery esc would still be okay with the higher kv motor (2s lipo) or if a larger esc would be needed.
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