Originally Posted by BobLS
Thanks guys....I have another question, does 2 engines give the same top speed as one of equal power? eg 2*150 or 1*300?
Perhaps excelleration better but not top speed is my guess! ???
As a rule of thumb you will lose around 30% or more using two engines, there is also the extra cost in servicing, the fuel consumption will be higher and they will cost quite a bit more to start with - the only real advantages to a twin engined boat are that of redundancy - ie if one breaks the other will get you home - and with modern engine reliability that is becoming less likely (but still worth it if you're in the middle of nowhere), and of course stabilty and manouvrability the you get from two engines.
I reckon you will need two 200's to replace one 300 to get better performance!