I just bought a 1978 Procraft bass boat and it has a 85 H.P. Evinrude 1517cc with FirePower ignition, Mod.#85899C, Ser.# J0001254. I need help with a year for sure and oil mix ratio. Any other info about this motor will be appreciated. I'm in the process of getting a service manual but general info will help so I can get ready to start this baby up. It has been setting for awhile so I know I will need to drain all old gas, change filters ect.ect. Thanks for any help.