Help identifying 60's or 70's Eska outboard

[Marty M]

Just purchased this old Eska, and for maintenance and repairs would like to ID it. Couldn't find a tag anywhere. Does anyone recognize it? As you can see from the photos, someone wrote TF-70-11 on the side of the tank. Nothing online seems to match that number. Any help would be appreciated. Also wondering about proper gas/oil mix. Thanks!

 

[brim_buster]

Looks to be an early 70s model. Theres a metal plate on the transum bracket that should have set of numbers on it. Forward only and you rotate it 360 for reverse. Air cooled Tecumseh powerhead ( like a lawnmower ). The legs been welded it looks like. The legs were built by Clinton Mfg. Water cooled leg with an impellor. ( water pump ). Very simple engines that run well. Parts are readily available. Easy to work on. 50:1 mix with TW3 2 cycle oil. Point gap at .20 and plug .25. If you can find the tag or a block stamp on the power head I could nail it down exactly.