s o wrote:
Hi ,

I read that 4-stroke outboards are less powerful than 2-strokes, some
articles even suggest that they're only half as powerful. is this
true? from your experience, what is the hp equivalent of a, say 15 hp
4-stroke? thanks.

s o

The major difference between a 15HP 4 stroke and a 15HP 2 stroke
is................................................ .................................................. ...............................................
2 strokes.

Unless weight is a problem, go with the 4 stroke. Two strokes are
smaller and lighter for the same HP output, but are seldom considered
more reliable than a good 4 stroke and are frequently considered less.