i like to know is it worth it to sawp to 2003 yamah 150 salt water series efi from my 1992 yamaha 200 carb engine,is save more gas,what % gas will save??maybe 40%less then my 92 200?and will the rig fit ?(2003 yamaha 150 salt water series efi to 92 yamah 200 carb)please tips.
