There is no fuel line diagram for that model or most others like it. There are no set instructions or procedures as those types of repairs are typically done by a professional who would rely on their training and experience to determine how the lines should fit.
In fact, for most models, even when they are being built on the assembly line the fuel hoses are individually cut and fit by hand.
If possible, try to replace the lines one at a time so you can use the old lines as a guide to determine how each line is routed and where it connects. Keep in mind that the lines need to be clear of any moving parts or heat sources and cut to a length where they will not kink or stretch enough to split or come off. If the old lines are no help then looking at the parts illustrations in your
or at the
site might give you some ideas.
In the illustrations, see below, item 5 will be the fuel delivery line while item 6 is a purge, or vent, line. Your fuel feed should go direct to the carburetor and will be drawing from the tank in a position where the fuel will be above it during use.
There are some general tips in the links below that might help further but any problem with the fuel lines could lead to a serious safety hazard as well as damage to your trimmer so if you have any remaining questions or reservations we would recommend you consult a professional to assure your trimmer will operate safely and to its full potential and still meet all emission standards.