Wow guys, thanks for all the comments, it really is helpful. I'm not a tree hugger, but I recycle my waste at home because it costs me nothing, I used to drive a 4.2 V8 Turbo car but I don't now, not because of the environmental issues, but because I used to get depressed every time I filled up (those of you in the states might not understand that bit. Fuel is VERY expensive in Europe). So this isn't an ethical thing for me, but I wouldn't dump anything in the sea if it was avoidable. I don't drop litter either.
With regard to the dink, I'm looking at an 11ft AB Aluminium Rib
, that's actually as big as I'd want to put on a Catana
50 and as big as I need. There will rarely be more than 4 of us, hence to 15/20 hp requirement. Most of the four stroke 20s weigh exactly the same as the 15s, so I'd go with a 20. The 2 strokes seem to bulk up over 15hp so it would probably be a 15. Once you get over 15hp it seems that the 2s/4s argument on efficiency, weight, fuel, noise
etc all seem to shift towards 4 strokes. As a matter of courtesy I will let you know what I decide to do when I get to the Caribbean
. I have a spare roll up dinghy
and a Torquedo 1003 for emergencies, so I will dump (sell) the existing rib
in the Med before I leave instead of hauling it across the pond.
Thanks again guys.