fuel consumption

Good afternoon, I'm looking at a 99 310 Sundancer with twin 350s. Does anyone have a fair idea of fuel consumption at cruising speed? I've heard they Cruz at about 25 miles per hour and use about 10 gallons per hour per engine. Is this correct?

Does anyone have experience with fuel consumption monitoring systems? I am looking to install on my 280 Sundander, with 4.3 Merc IOs. Any input would be appreciated. I am thinking about this for two reasons: 1) for optimizing fuel consumption with different loads/conditions, 2) if engines are...

I have a 2007 290 Amberjack with T-350 Mag MPI Bravo III (about 75 hours). I bought the boat used this year and have only put about the last 10 hours on it, but have a question about fuel economy. Based on gage readings it appears the port engine uses fuel at a faster rate. Also, at my first...