50311-ZY3-020ZB L *NHB14M* Bracket - Overview. The 50311-ZY3-020ZB L *NHB14M* Bracket is a genuine Honda marine engine component designed specifically for the left stern bracket application within the engine mounting system. This bracket plays a critical role in securely mounting the engine to the marine vessel's transom, ensuring stable operation and reliable mechanical support. Its robust design and finish in Aqua Marine Silver Metallic (NHB14M) make it ideal for models produced from 2018 to 2