I just picked up this motor which has seen better days.<br /><br /> I want to replace some parts on it but for the life of me I don't know how to identify it. It seems that the transom mount assembly has been replaced at some point because it is a completely different shades of blue than the rest of the engine. The transom mount is clearly from a '67 18 horse based on the model number but the hood and lower cowl is the later 70's style.<br /><br /> This only leaves me with the freeze plug for a reliable engine ID. Since I have no idea where to find freeze plug dating info on the web I'll have to bother you folks with my hat in my hand.<br /><br /> The top number on the plug is E000N57 (the N position is pretty scratched up but I *think* it's an N). The bottom number is 25802E. I was told it was a '73 35 hp but I have no clue if it is or not and guessing doesn't count for much when you're ordering parts.<br /><br /> Thanks folks, Steve