The serial number tag is situated over the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located in between the thumb screws above the steering tube. This document is made up of many of Yamaha's beneficial trademarks. It might also include trademarks belonging to other companies. Any references https://yamaha-outboard-motors-fo13466.newbigblog.com/43244046/top-boat-marine-temperature-switch-secrets