Every model has its possess certain set of parts that in good shape it. Click your manufacturer beneath for instructions on locating your model or serial number. The serial number tag is found to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found between the thumb screws https://rafaelrttro.theisblog.com/36501638/the-definitive-guide-to-300-hp-outboard-motors