I recently acquired a Lauson Sport King outboard that used to be my Dad's and my Uncle's. It is a 4 cycle and seems to be air cooled. It hasn't been run in almost 30 years. Besides changing the engine lubricant, is there anything else that I should do before trying to start it? Since it's air cooled, does it even need to be run in a test tank? I don't have a manual for it and my Dad and Uncles remember nothing about it.