The serial number tag is found around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located between the thumb screws above the steering tube. This document has many of Yamaha's useful trademarks. It might also comprise trademarks belonging to other companies. Any references to other companies or https://eduardobsnzx.blogdigy.com/the-outboard-motor-size-for-boat-diaries-56447595