Single 8.1, if available or 7.4 if not, with VP or Merc dual prop.
Sufficient performance with vastly better economy and much lower maint cost
than with twins. DP sterndrive provides good manuverabilty as well.

Butch
"bowgus" wrote in message
oups.com...
1) Should I go with dual 4.3 L (205 HP) mercruiser or a single 7,4 L
(454 HP) and what's the pros and cons of having 2 engines instead of
one ? I can't make my mind about the fuel overall cost.

For what it's worth, I've heard from owners their dual prop (e.g. bravo
3, volvo) gives improved efficiency/performance/tracking over a single
prop ... or ... almost as good as having twin engines. So I'd test
drive a dual prop. Plus there's a lot less to maintain/go wrong ...
about 1/2 as much :-)