Originally Posted by Boracay
You're asking the question on the Cruisers Forum. From the perspective of a cruiser outboards would not be suitable for your boat. A pair of 120hp diesels may do the trick but advise from a Naval Architect would be advisable.
??I'm aware this is the Cruisers Forum. Maybe I didn't explain.
What I want to do is take a 1971 Whitcraft 45' and turn into a "Whitcraft LRC." I want to get rid of the huge gas engines that suck fuel
, and replace them with smaller modern outboards that are cheaper, lighter, more fuel efficient, and easier to repair. A small modern 4 stroke Honda
40hp would burn approx. 1 gal per hour. $6000/engine. Double that for two. I think this boat needs two, because it has twin rudders. There's ample space to mount them at the corners on transom. The transom is massive. A new engine
is like 200lb/each. They would be fixed in place. Run throttle cables
and wires. Fuel line into installed tanks
With twin 120 gallon tanks that's a nice cruising range, plus u get to run the genset whenever u want AC on the hook. The empty engine room gives great storage
. Imagine solar panels
on the sundeck...
The boat has a layout that would work for extended cruising
. Space, storage, tankage, etc. Its downside is the weight, sure, and the lack of displacement hull. It draws 3' feet, is 12" high and 12' wide. You could canal boat all day long, ICW
, lakes, ANY costal cruising.
There are plenty of cruisers using modern low hp gasoline outboards to push their sailboats or displacement/semi displacement hulls at 8 knots. Think Rosbourough 24, or C-Dory, or Ranger
, granted these are 1 screw...How about catamarans? or twin hull boats...Why would twin 30-40hp outboards not be suitable?
I'm looking at this repowering calculator
Boat Speed Calculator
The boat weighs 20,000lb with the current
engines. Loose the engines and that's 1500lb right off the top.
I only want to cruise
at a snail pace. And for the record
, the Whitcraft 45' is a "Coastal Cruiser" not a houseboat LOL