I was wondering what size tank is on my 1994 Robalo 1820? I was out on the water and the guage showed a lil under 1/4 and I went to fill the tank it took 39 gallons. I dont have the specs on this boat and would like to take it offshore it has a 150 merc blackmax. What kind of milege should I be getting from this 1993 150hp merc?<br /><br />Thank for all your help.....
