The serial number tag is found to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Situated involving the thumb screws above the steering tube. Thankfully, PartsVu contains a wealth of resources to assist you find the Mercury outboard parts you need to keep your engine running effortlessly, https://miloocfzr.bloggadores.com/35936502/the-5-second-trick-for-outboard-motor-mercury-yamaha