Hi Norm,
The copper fuel line is standard , but. all the ones I had were leaking fuel from the pipe and the tank grommet so
I just replaced the grommet and used a fuel hose thus getting rid of the copper line.
The black hoses sometimes after decades can melt cloging fuel lines and is why I mentioned before to just
Start the trimmer with a fuel hose from the carby with the other end in a cup of fuel ,that will tell you if the original copper line is restricted.
Cheers
Max.
