The serial number tag is located over the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located amongst the thumb screws above the steering tube. By coming into your email handle you conform to receive marketing messages from Yamaha Outboards. You could possibly unsubscribe at any time. At https://yamaha-outboard-motors-ne39077.rimmablog.com/35855803/the-basic-principles-of-marine-outboards-for-sale