The serial number tag is situated around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found involving the thumb screws above the steering tube. This doc incorporates many of Yamaha's useful trademarks. It might also consist of trademarks belonging to other companies. Any references to other companies https://ebay-outboard-motors-yama99405.bloguetechno.com/top-marine-boats-for-sale-secrets-72250067