Originally Posted by willk
That's too much load for a 9.8hp (I have one). The hydrofoils (dolefins) are a waste of your time and money (I have some). Either carry less load, or get a 15hp
Same again - the 9.8 is a forum favourite but 1 1/2 (light) people is where it's at - on my 3.4m Zodiac it needed major weight shifting (ie hanging over the bow for dear life) to plane with 2 adults (total 20 stone) + 2 kids (total 10 stone).
Me and one kid (total 18 stone or so) was ideal.
The standard factory prop is usually ideal 99% of the time on these small SIB's/engine combo's.