The serial number tag is found within the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Situated in between the thumb screws above the steering tube. The good news is, PartsVu features a prosperity of resources to help you find the Mercury outboard parts you need to keep https://paxtonucglp.timeblog.net/72586558/detailed-notes-on-bf75-honda-outboard