The serial number tag is situated around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Positioned in between the thumb screws above the steering tube. By getting into your email address you agree to obtain marketing messages from Yamaha Outboards. It's possible you'll unsubscribe at any time. https://milouzdik.liberty-blog.com/37051279/a-simple-key-for-outboard-motors-for-sale-california-unveiled