The serial number tag is situated to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found between the thumb screws above the steering tube. By coming into your email address you agree to obtain marketing messages from Yamaha Outboards. Chances are you'll unsubscribe at any time. At https://yamaha-outboard-motors-go64958.creacionblog.com/36659128/the-basic-principles-of-marine-outboards-for-sale