I have a 18' cc hydra sport(v-hull,19" deadrise,1,200lb no/power) that has a '97 dt200 with a 20" three blade prop,it gets bad mpg so Im thinking of a new or used outboard.A 90hp 4-stroke suzuki weighs 340lbs,the etec 150 weighs 420lbs.Dealer says stay below 440lbs which does not leave too many...