It's a gas! Day 2 of my new 3.5 hp water-cooled outboard went well. This unbelievably cheap and light (about 20#) motor (and now on special on eBay Oz for an incredible $207 delivered, not a misprint!) pushes my TI along at over 5 knots, even in lumpy water (spray skirts definitely recommended if you want to keep your >shoulders< dry!).
Fuel tank holds a bit over 1 litre (I put in a measured 1 litre to start with, and trying hard to use it up, it took most of my first 2 days of use before it ran out).
I have come up with (what I believe to be) a unique motor mount, which is built into my pine haka, which sits on the starboard akas, with the motor literally under my elbow next to the front seat. This is an ideal location, as I can conveniently handle starting, refueling, tilting and rotating for reverse etc. This midships location ensures the prop is never out of the water in waves either. I have added 10mm thick closed-cell yoga mat material where the bench touches the akas, so another TI could fit this temporarily, simply after removing the paddle U bracket on the rear aka.
I am extremely happy with the mount, and cannot believe the motor. Sure its LOUD, and being 2 stroke, it consumes 30cc of oil per litre of petrol (but it takes over an hour to do it, so in the grand scheme of things is not much of an environmental vandal).
While my TI is a >sailboat<, and this motor is very much a back-up back-up (after sail>pedal>paddle), I definitely believe that having at least one of these in any group heading offshore will hugely enhance the safety of the whole group.
My local trailer guy made a neat mount for travelling with the outboard and TI, well worth the effort.