Originally Posted by two stroke mick
I thought I would never say this but I am glad that I have a small rib. as an aside
what would you class as small, med, large ribs
sub 5.3 small
5.3 - 5.8 med
5.8 plus large
that's a narrow spread. Ribs range from around 4-12m plus.
So perhaps sub 5.5, small
5.5 to sub 7, med
7 plus, large
All very arbitary though.
IMHO once you get over 6m, they seem to drink a lot more fuel due to the beam, weight (boat and passengers) and consequential engine all getting larger! Hence diesels only make sense on over 6m boats (providing you put enough hours on each season to make up the cost difference)
Bit like cars, diesel engines generally weigh more (though less recently) and have more torque than petrol. Therefore they work better in cars of a larger nature. They used to be in trucks, then 4X4s and now down to the Golf bracket of cars. Any smaller than that and on current technology a light petrol is probably better.