Last season my 1971 55hp Chrysler outboard ran poorly after a solid hour or two of running. I found a cracked coil. I replaced both coils, both spark wires, both plugs, both sets of points and two new condensers. It ran like a champ all last season after installing these new ignition parts. Recently the motor quits running after it has been used for an hour or two. It runs without any indication of a problem and then suddenly acts as though it has bad fuel. When the motor quits it will not start and run on its own unless I physically hold the choke almost closed. With the choke modulated by hand, I can get it to start and run but not to full rpm or power. This tells me it is unlikely an electrical problem. I am sure the fuel being burned is good. After cooling down for an hour, the motor will run like new again. I suppose it's possible one of my new coils could be acting up when it gets warm as nothing says new coils can't fail after just 10-12 hours of life. I am wondering if any of you familiar with these outboards think it could be the fuel pump or something else I have not considered? Is it possible for an old fuel pump to work just fine after rest, or when cold, and become fatigued after cycling or getting warm no longer delivering proper fuel?
Any experienced help is greatly appreciated.
Any experienced help is greatly appreciated.