My brother in law bought an older boat. He says it has a Johnson 50HP. It's been a while since it ran and I'm trying to help him; unfortunately, it's over the phone because he lives 1000 miles away. I asked him to find me the s/n so I could figure out the year and maybe find a manual. He says the s/n is J50BELCO. This didn't sound right--can anyone help me out with this?<br /> I used to have a 73 Johnson 50HP and the s/n was something like 73ESL50 or something like that.<br />Thanks for any help you can offer.