The serial number tag is found around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found involving the thumb screws above the steering tube. Fortunately, PartsVu provides a prosperity of resources that can assist you find the Mercury outboard parts you need to maintain your engine running https://yamahaoutboardmotorsforsa13543.blogthisbiz.com/43539888/rumored-buzz-on-honda-bf15d-outboard-motor