The serial number tag is found to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found between the thumb screws above the steering tube. This document consists of many of Yamaha's important trademarks. It can also incorporate trademarks belonging to other companies. Any references to other companies https://yamaha-outboard-motors-nz79898.ssnblog.com/35832261/the-greatest-guide-to-yamaha-6hp-outboard-fuel-mixture