Honda Outboards BF40A/BF50A Service Manual, Page 369Get this manual
BF40A-BF50A Apply grease to the:roller, shift arm pin and spring- gear and roller sliding section of the shift gear- bushing- gear of the shift arm Note the installation direction of the shift arm pin Set the roller and shift gear in the neutral position as shown Install the shift gear and spring guide assembly with the shift arm set in vertical position as shown[2]