JumbleDuck
Well-Known Member
10hp is less than you'd choose nowadays for an engine, but its enough given that its already there.
I have a boat of a similar size and weight to a Centaur, and my 1GM10 does just fine as an auxiliary. I get 5.5kt flat out and 4kt into a 20kt headwind, as long as the waves aren't too bad. A wee bit more would be nice but, as you say, the 10hp one is there.