Yamaha Outboard Motor MODEL, PRE-FIX and SERIAL NUMBER’S are stamped on a metal plate which is mounted on the transom clamp bracket located at the rear of the boat. If it is original powerhead then serial number may be an aluminum plug on engine block otherwise no way of telling. Yamaha Outboards. Yamaha began producing outboard motors in 1958 thanks to two engineers. It took 2 years of testing and tuning before Yamaha was ready to release their first model. At the time, Yamaha was known for making musical instruments. This led many people to joke around that this was the reason the motor was so noisy.
Vessel Description: A 300 HP Yamaha Engine, was reported stolen from Top Notch Marine, Inc. in Ft. Pierce, Florida on August 25, 2018. The engine was removed from a 2017 Wellcraft 242 Fisherman. The engine is brand new, grey in color with model/serial number F300UCA/6CEN-1044624. The theft was reported to St. Lucie County Sheriff’s Office under Report Number 18-10552.