Please help me identify my "new" motor

[Adventuredadmax]

Good afternoon, everyone. I just picked up a 1962 12 foot Sears Aluminum boat. It also came with a 7.5 horsepower air-cooled Johnson 2 stroke engine. I would like to get it running again but I need to know what year it is and if parts are still available. The engine tag says J.C. Penney and the model is 1002. The S/N shows to be 57-131362. Any help is greatly appreciated. I can't wait to get this going and take the kiddos out in it!

 

[Adventuredadmax]

Ok update, upon digging some more, it looks like this is an Eska 7.5hp 2 stroke with a Tecumseh air cooled power head. I think the model 1002 is a 1975. Anyone have a lead for buying parts such as carb rebuild etc? Looks like I need to rebuild the lower drive part too possibly. I hear these had "water cooled exhaust" and I need to look into replacing the water pump for that. I would also very much appreciate if anyone has a service manual they would be willing to share. Thank you for the help