The serial number tag is located around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located between the thumb screws above the steering tube. By moving into your email address you agree to acquire marketing messages from Yamaha Outboards. You could possibly unsubscribe at any time. At https://outboard-yamaha-motors-fo09639.blog-kids.com/37174463/a-simple-key-for-outboard-motors-for-sale-california-unveiled