The serial number tag is located to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located concerning the thumb screws above the steering tube. OMC Model Number Location The model and serial numbers in the vertical drive really should be Found on the engine model and serial https://ebay-outboard-motors-yama40515.mpeblog.com/64997032/the-smart-trick-of-yamaha-150-gph-that-nobody-is-discussing