I finally found a way to do it easily........ I cut 15mm arrow head at end of line. Feed a piece of fishing line through hole and out of fuel filler hole. Pierce a small hole in line and tie fishing line on. Spray end of line with WD40 and pull fishing line, and grab the end with long nose pliers...... Maybe it's obvious to some people but this job was always a pain to me. not any more speedy
........................Keep your blades sharp......................
Boy I have been doing that for yrs except I use tag wire as it is stronger. With tag wire a little stiffer you can line with the hole easier too. Whenever I can get away from the Tygon and install rubber lines instead. I know you can't see through them but with primer bulb you see the fuel there anyways.
Tyler what Speedy has found works much better most times as for me there are handheld 2 cycle tanks with lines placement that you simply can not use any type of tool that I know of to access the pass through holes. Things like small filler necks and where the lines pass though next to filler where you got to double back to grab them or the pass throughs are high up in the tank.
The tag wire or in Speedy case fishing line is much easier to get a hold on so the fuel line can be attached and then pulled through.
I can see in your photos that is a Ryobi PLT3043 trimmer. I have been doing this for years but I used a wire. Your idea is not a bad idea. How I do it is I used a 1.2mm x 25cm long stainless steel wire with hook on the other end and a key ring on other end. Other tool I made out of a throttle cable I use to hook the line or fuel filter off the cap opening. Please see photos.