I've never been much involved with any form of boating (comes from living 70 miles inland I suppose) but one thing I remember from when I was a young lad was one of my father's boat-owning friends telling him that the horsepower of an outboard motor gave a guide to its fuel consumption, a 10hp motor using 1 gallon per hour and so on. This would have been around 1968-1970 or so.
Was this a mis-remember? Was it true back then? Is it still true today?
