The serial number tag is found about the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located concerning the thumb screws above the steering tube. This document is made up of many of Yamaha's beneficial trademarks. It might also incorporate trademarks belonging to other companies. Any references to https://yamaha-outboard-motors-fo42504.mybjjblog.com/top-boat-marine-temperature-switch-secrets-49223676