125 HP on my 1975 20' SF..Under powered ?

[oldbluesplayer]

first, none of the 70's motors were rated at the prop, that didn't come into being 'till the 80's.

I run an 83 Johnson V-4 115, plenty of get up and go, nice 25 mph cruise, 30+ top end. and light. motor weight on a 20 makes a difference, the V-6 200 will be squatting in the stern at rest, but you sure won't have to work the motor hard to go fast.

the 125 Force ought to be fine, too.

Bill