The serial number tag is situated about the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found between the thumb screws above the steering tube. This document is made up of many of Yamaha's important trademarks. It can also have trademarks belonging to other companies. Any references to https://knoxthpva.blogaritma.com/35041874/not-known-details-about-40-hp-outboard-motor-comparison