The serial number tag is situated on the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Situated amongst the thumb screws above the steering tube. By moving into your email address you agree to acquire marketing messages from Yamaha Outboards. You could unsubscribe at any time. At PartsVu, https://devinhncoy.blogofchange.com/37608314/5-simple-techniques-for-new-25-hp-outboard-for-sale