The serial number tag is located about the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found amongst the thumb screws above the steering tube. OMC Model Number Location The model and serial numbers of the vertical drive must be Found to the engine model and serial number https://remingtonuofxi.isblog.net/rumored-buzz-on-honda-bf15d-outboard-motor-53961585