On Wed, 29 Oct 2014 10:38:39 -0500, "James"
wrote:

Hi Group, I'm looking at a 28' Fiberform with twin rebuilt Chevy 250
6cly engines (165hp each). How do thes compare with a single 350 Chevy
in the 260 to 300hp range for power and fuel consumption? How about
idling down to trolling speeds? Thanks, Jim

===

There is a lot of appeal to twin engines from the stand point of "get
home" reliability but they are definitely a compromise, especially on
a boat that size with inboard engines. For starters, both engines
almost certainly share a common fuel tank and a lot of problems
originate there. Twins also weigh considerably more than a large
single, have more underwater drag, take up more interior space, and
require twice the maintenance. It is unlikely that you will realize
more speed because of the weight and drag issues.