The serial number tag is found to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found between the thumb screws above the steering tube. By entering your email deal with you comply with receive marketing messages from Yamaha Outboards. You could possibly unsubscribe at any time. It’s https://outboard-motors-yamaha39382.bloggazzo.com/35805268/fascination-about-yamaha-115hp-2-stroke-outboard