Originally Posted by Downhilldai
That Soozook is late '80s. Is the boat a similar age and on original pvc toobs?
Ideally, you'd need 40-50hp to ski with that RIB - 25hp would be only really be ok for pottering about.
Already having the engine, see if you can update the Suz 25 to 30 HP, look for the parts to change and their cost, will perform better than a 25 but definitely not for skiing either.