Hello it has been awhile since I been on here I just picked up a 1985 Chaparral bow rider with a inboard 230 hp Mercruiser in it serial # A366565 I would like to change plugs and wires for this motor but not sure I have all the info for this motor was hoping someone could break it down for me been told it is a 305 chevy not sure the liters of it though any help would be great thanks Mike