On 2007-06-07 06:53:25 -0400, "Roger Long" said:

http://home.maine.rr.com/rlma/Fuel.gif

This should be typical of many cruising sailboats around 32 feet, 20
HP, 20 gallons of fuel but I wouldn't want to draw less than 17 for
fear of sucking air and to have some reserve.

I've been keeping track of our consumption since we got the boat,
actually driving at set RPMs for long enough to half-empty the tank.
Surprisingly, our mileage is steady from about 2000 down, a bit over 20
nmpg. At 2500, it's about 17; 3000+, about 6. We typically run at 2200
and hold between 5 and 5.5 knots, depending on the conditions.

Ours is a Yanmar 2GM20F, swinging a 16" 3-blade MaxProp, which changes
the rules somewhat.

--
Jere Lull
Tanzer 28 #4 out of Tolchester, MD
Xan's new pages: http://web.mac.com/jerelull/iWeb/Xan/
Our BVI pages: http://homepage.mac.com/jerelull/BVI/