1984 Cuddy w/ 2003 Johnson (Suzuki) 140 4-stroke.

With 14x19p prop, 25 gal. fuel, 1 person, 40 mph (gps) @ 6200 rpm.

With 14x21p prop, same everything else, 39 mph @ 5800 rpm.


Don't have a fuel monitor but when I fill up and compute, I get right around 5 mpg, thats when I average 20-25 mph over the trip.

I have never gotten less than 4.2 mpg. *That was running 12 to 14 mph into 3 foot seas.

(All speeds and MPG's are "statute", not KNOTS)