The serial number tag is situated over the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Positioned in between the thumb screws above the steering tube. By coming into your email deal with you conform to receive marketing messages from Yamaha Outboards. You might unsubscribe at any time. https://johnathaniomte.isblog.net/yamaha-150-sho-price-fundamentals-explained-53955730