I have a 135 opti with 487 hours on it, change the plugs once, it has smartcraft, used 1247 gal of gas, never had a problem. it gets used all year winter too!! No oil to change ever, will never buy anything else. with the dfi there is hardly any fumes, no smoke ever! the weight u save vs. a 4 stroke will greatly improve the handling of your boat not to mention your boats transome will last longer with less weight on it. I have nothing against yamy have a T 8 for a kicker!!