The serial number tag is situated around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Positioned between the thumb screws above the steering tube. By moving into your email deal with you agree to receive marketing messages from Yamaha Outboards. Chances are you'll unsubscribe at any time. https://yamahaoutboardmotorsprice72726.blogunteer.com/35814964/5-essential-elements-for-yamaha-250-outboard-lower-unit-oil-capacity