We just purchased an old Evinrude for our skiff, but are unsure of age and horsepower. The Serial number is 10014 09650. (The 4 may possibly be an "A". It is hard to read.) It also has a split (two hose) gas line which I am unfamiliar with. What is the purpose of the two hoses? Also, what is the oil/fuel ratio? Thanks for any help.