I am currently running a 72 Evinrude 135 Starflite, on an 18' Christ Craft Cavalier. I am mostly going to be fishing with this boat but occasionaly doing some skiing. I am thinking about installing a 12 gal tank in the front bow with a 6 gal reserve. Do you guys think that will be sufficent or should I go bigger for a day on the lake? Also how much mix in quarts should I put in a 12 gal tank if my mix ratio is 50:1. THanks a lot you guys.<br />Hope it Runs