The serial number tag is located within the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found in between the thumb screws above the steering tube. By getting into your email deal with you agree to obtain marketing messages from Yamaha Outboards. You might unsubscribe at any time. https://outboard-yamaha-motors-fo38271.collectblogs.com/81532250/5-essential-elements-for-yamaha-outboards-for-sale-usa