I have a 175 Evinrude Model Number 175840C.<br /><br />I have some info showing it as a 1975. However, it has sticker (on the spark advance arm) saying 1978 175 HP Spark Advance 28 degree. <br /><br />Other identifying info is 2448 cc on the lower unit.<br /><br />Looking to track down the year so I can get an OEM manual and get to work on it.<br /><br />Thanks,