I have a Yamaha Malta that I use as an aux on my 5 m rib and what a great little motor it is. However, it weighs a lot more then 10kg more around 20 but I have never weighed it, I also donít know what the output is but were told when I bought it it was 3,5 hp.
Itís a very easy job to service yourself and you would learn a great deal, outboard in miniature!
I recently replace the fuel pump diaphragms, which improved the starting significantly I also do the water pump impeller every couple of years along with the gearbox oil ( annually) and the plugs. Itís very easy to run up in a large bucket.
When you get one I am sure you will be pleased.