On Tue, 23 Sep 2008 08:19:36 -0700, Gordon wrote:

How do I ballpark the fuel usage for a modified keel 37' ketch 18000#
at 5 knots with a Westerbeke 4-108 with a fairly clean bottom?
Gordon

With flat water, no wind, clean bottom and efficient prop it should be
less than 1 gph, maybe as low as .6 or .7, all the way up to 1.5 or
more with adverse conditions.