The serial number tag is located to the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found in between the thumb screws above the steering tube. The good news is, PartsVu includes a prosperity of resources to assist you to find the Mercury outboard parts you need to https://damienbwfls.blogsuperapp.com/37516604/about-johnson-175-hp-outboard-motor-parts