Ok I just bought an 18ft tracker with a 90/65 merc jet (brand new). after breaking it in Im going about 120 miles up a fairly slow moving river with about 500lbs (not including weight of gas) then Im coming back up river with about 1200lbs (not including weight of gas which should be half of the original trip up river). I know this is broad but approx how many gallons of gas am I going to need to bring?
The max weight of the boat reads 1500 lbs or 7 persons - thats in addition to the motor weight. (1700lbs without motor).