Hey guys. I just scored an old evinrude 5.5 HP fisherman with a serial number of 5520-12772. I can't find any info when searching that serial number, a google search results nothing. It starts first pull and hammers down in my 55 gal drum! The thing may be an antique but I plan to run the crap out of it as long as she'll give me!!! I'd just like proper info to further service and maintain it down the road. Thanks