The serial number tag is situated on the SWIVEL BRACKET (port or starboard); or, check the INSTRUCTION PLATE, Found amongst the thumb screws above the steering tube. By getting into your email handle you conform to receive marketing messages from Yamaha Outboards. Chances are you'll unsubscribe at any time. At https://yamahaoutboardmotorsnz87417.theideasblog.com/37455955/the-smart-trick-of-yamaha-150-cc-scooty-that-no-one-is-discussing