The serial number tag is located within the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located concerning the thumb screws above the steering tube. This doc contains many of Yamaha's worthwhile trademarks. It may also incorporate trademarks belonging to other companies. Any references to other companies or https://outboard-motors-yamaha76295.blogspothub.com/35914931/used-mercury-outboard-motor-values-no-further-a-mystery