I think in North America parts cost may be an issue.. a friend had a single cylinder Bukh in a Laser 28 - it always ran OK until the (RWC) water jacket in the head corroded through. He was out over 3K before it was fixed with new parts.
FWC would have fewer issues...
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)