The serial number tag is situated on the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located between the thumb screws above the steering tube. This doc contains many of Yamaha's precious trademarks. It might also consist of trademarks belonging to other companies. Any references to other companies https://yamahaoutboardmotorsyamah32849.59bloggers.com/37403728/about-johnson-175-hp-outboard-motor-parts