The serial number tag is found to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found amongst the thumb screws above the steering tube. By moving into your email handle you agree to get marketing messages from Yamaha Outboards. It's possible you'll unsubscribe at any time. It’s https://yamaha-outboard-motors50470.mybuzzblog.com/16737079/rumored-buzz-on-honda-bf15d-outboard-motor