The serial number tag is found on the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found concerning the thumb screws above the steering tube. This document is made up of many of Yamaha's important trademarks. It may also include trademarks belonging to other companies. Any references to https://elliotoaiqy.blogdigy.com/the-2-minute-rule-for-yamaha-250-vmax-sho-outboard-for-sale-56396527