My Cal 28 had an A-4 with 2-1 walters reduction V-drive I replaced it with Yanmar YSM 8 which puts out 7 hp. pushes at hull speed 6-7 knots, moves good in a gale and I am very happy with mileage -1 liter per hour --Cal weighs 6000 lbs. 4.5 draft--Dale
Cal 28, 1967
Where God got it done!