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I have a 1996 115 hp Mariner 4 cylinder. It is a 2 x 2 motor. As far as I can tell this motor is the same size (displacement) as the 125 hp that Mariner built in 1996. Is there a way to get that extra 10 hp? I have the motor on a 1996 Starcraft Superfisherman 190 that is rated for a 150 hp...
