The 4-stroke will give you noticeably better fuel consumption, is a lot
quieter and generally more reliable. The down side is that they are
heavier. That can make a big difference in a dinghy motor but not a lot
when you get above 25HP.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

wrote in message
ups.com...
Another thread concerning a 9.9 hp got me wondering what to use to
power a boat I will build. It needs to be up to 75 hp.

Does a 4 stroke really give noticeable increase in mpg?
Are 4 strokes really finicky compared to 2 strokes (I mean reliability).