Uber newbie merc 500 owner needing info

[Full jeweled65]

Please assist...doing all I can to educate myself on this recent purchase of '61 dorsett Belmont and merc 500 outboard. To qualify my outboard knowledge, I'm basically a newborn. But very eager to learn..

Need verification of year, strokes, trim type serial 185-5890 also on any SPECIFIC specs, manuals, diagrams, pics

thank you

 

[racerone]

Sounds like a 1965 model motor.-----------Any pictures ?