The serial number tag is situated to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found among the thumb screws above the steering tube. OMC Model Number Location The model and serial numbers in the vertical drive must be located around the engine model and serial number https://yamaha-outboard-motors-hi23209.wssblogs.com/36744143/5-tips-about-boat-marine-parts-and-supplies-you-can-use-today