On Wed, 06 Jun 2007 16:24:31 GMT, Lew Hodgett
wrote:

What is the max fuel consumption rate of that 3 cyl engine, about 1.5
quarts/hour maybe?

A 20 gal tank would provide over 50 hours of operation ((20*4)/1.5 = 53+).

A small 3 cyl diesel will typically burn around 3 qts/hr (.75 gal).
Range is only part of the issue. Most cruisers run the engine 2 or 3
hours per day for battery charging, hot water, etc.