The serial number tag is found to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located among the thumb screws above the steering tube. OMC Model Number Location The model and serial numbers of the vertical drive needs to be located on the engine model and serial https://yamaha-outboard-motors-fo67495.blazingblog.com/36841296/yamaha-250-outboard-top-seal-for-lower-unit-an-overview