Twin Etec 115's for a 23'?

[bigpine33]

Does anyone have twin Etec 115's on a 23'? I'm thinking that is the route I would like to go and I'm curious about performance and fuel economy.

I currently have twin 1994 140hp Johnsons on the back of my 23' Savage. I bought them new 16 years ago and have been very happy with them. I run 14.5x19 props and I can plane on a single engine and cruise 18 knots with the boat fairly loaded (no trim tabs). A number of times over the years, I have left the dock with only one engine running, the mission continued!

So, I have this theory that twin engines may be less expensive that a single engine in the long run. Reason being, you are not as inclined to get rid of it due to reliability concerns. When I priced two 115 Etecs vs. a 225 Etec, they are real close in price with the 115s being less than $2k more rigged/instrumented.

I'm curious if I could plane on one Etec 115? Being 2 stroke engines and comparing them with my old 140hp loopers, I think there is a chance.

I currently get about 1.1 mpg running them at 3800-4000 rpm. How much would I expect that to improve? Would it be more or less than 3 mpg?

Any thoughts or comparisons with similar setups would be appreciated.