Remember it is a 2 cycle...requires 6 oz outboard oil per gallon of gasoline.
Watch out for overheating...rubber water pump impeller may fail at any time
if it is old. Carburetor and fuel system may be gummed up by old fuel
And check gear case plug to see if rusty water comes out.
Just the common items to give a once over to be sure you do no harm.
Depending upon prior use and care condition of your outboard may be
good to go or not good at all.
Good Luck
Louis