The serial number tag is found around the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Situated among the thumb screws above the steering tube. OMC Model Number Location The model and serial numbers of your vertical drive should be Found about the engine model and serial number https://yamahaoutboardmotorsgoldc49316.uzblog.net/5-essential-elements-for-yamaha-250-outboard-lower-unit-oil-capacity-50500734