I need help finding my model/serial number

[jeansarepants]

I am having trouble finding the model/serial number on my Johnson outboard. I am fairly certain it is a 1971 model but I can't find any plates for identification. I find a lot of numbers on the engine but not sure of what I need to be looking for. Can anyone help?

 

[5150abf]

Re: I need help finding my model/serial number

there should be a welch plug, nickel size plug, that has the model and serial number on it on the power head itself.