Over the winter I purchased a small pontoon boat with a 2012 Yamaha 60 hp, 4-stroke. I am trying to determine if it is a 60F or 60T. From what I read the difference is the torque and prop. My owners manual is for F50, T50, F60, T60, and F70, but doesn't say how to tell the difference. Will the serial number tell me what I have? Thanks, in advance.