The serial number tag is found over the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, located involving the thumb screws above the steering tube. OMC Model Number Location The model and serial numbers of the vertical drive should be Found around the engine model and serial number https://yamahaoutboardmotorsforsa10639.like-blogs.com/36608607/the-definitive-guide-to-anchor-light-marine-boat