Need a motor to get my 14' Hyside Outfitter XT across some slack water and am leaning towards a 2.5hp Suzuki. I may push 1 other raft on occasion but for tthe most part just moving a mildly loaded raft across some lakes. Any reason to move up to a 3.5hp motor? If there is no real benefit I'd prefer the lighter weight and greater fuel economy of the 2.5. Thoughts and experiences?