MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone.
You are invited to join our public Boat Repair Forum to seek assistance from other members.
You may also visit the Boat Motor Manuals section of our site to obtain a service manual.
Here are two links to the official Honda Shop Manuals for that motor. The manual covers BF35, 40. 45. and 50. It includes the original 50, that you have.
https://www.ebay.com/itm/Honda-BF35...oard-Service-Repair-Shop-Manual/251288466428?
epid=692270813&hash=item3a81f5b3fc:g:tq4AAOSwALtabVm4&vxp=mtr
https://www.amazon.com/Honda-Marine...518498514&sr=8-2&keywords=bf50+service+manual
Mike