I've not logged on for a while and only just come across this post .... apologies.
The Humber 6.3 with the Merc 1.7 is actually quite a good set up. No, you won't break any speed records but it IS good on fuel. (Though I would take the manufacturers figures on speed and fuel consumption with a pinch of salt! I think they were done with a basic boat and a teaspoon of fuel!) I have a fairly heavy version with 4 pod seats and a double console with bench seat at the front of that. The maximum speed I have ever had is 32 knots. With a full fuel tank, (150 litres) the top speed will struggle to get 30. I normally cruise at about 23 knots, which from memory is about 3,400 revs with my 23” prop. The fuel consumption for an average trip (varying speeds from tick over to full throttle), works out at about 10 litres per hour. You can work that out into your strange version of a gallon yourself!
The boat has a bloody good hull and is very soft for its length. There is very little tube sticking out the back (about .4 Mtr), so most of the 6.3 metres is hull…. My last boat was 5.8 meter Ribcraft but .75 of that was sticky out tube!
I have no problem seeing over the bow… and you will be glad of the turned up nose in a rough following sea!
There is a picture of my boat at http://www.rib.net/forum/attachment....achmentid=2787
Where is Novato?