GM/Chevy 305cid Mercruiser MIE 230hp inboards.<br />Serial #'s 6206083R and 6206069L.<br />Trying to figure when these were made/how old they are.<br />The owner has no idea,nor how many hours are on them.....<br /><br />Any ideas how old they might be or how to find out exactly?<br /><br />Also...
