couple of things re this post
Pollys comment of
If my mental arithmetic is right 60A is roughly 1 HP. These are good for little fishing boats on lochs/lakes where they do 10-15 minutes and then sit still for a while then a few minutes every hour and then 15 minutes to go back ashore at the end of the day. Backed up by a set of oars.
This is v v true but very understated. The rules on some of the lochs up here will not let you run any petrol engine and hence a few fishermen decided to use them as their auxiliary when sea fishing to save money and got into serious trouble.
the smaller the engine the more it suffers from getting clogged up so before you take anyone's word for it try the Honda 2.3. It is the lightest in the world, single handed control, comes with spare shear pins etc and will run for about an hour on 1 litre of fuel at full throttle. as it is also air cooled no gunk to pick up either.
re the mariner : this is the same as the tohatsu and made by Nissan along with the mercury and is a cracking wee engine. Not as light as the Honda or air cooled but not a bad wee thing.