The serial number tag is situated about the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found between the thumb screws above the steering tube. By coming into your email address you comply with acquire marketing messages from Yamaha Outboards. You could possibly unsubscribe at any time. At https://yamaha-outboard-motors-au14554.madmouseblog.com/17455025/the-5-second-trick-for-outboard-motor-mercury-yamaha