I was looking some things up the other day and just happened to watch a video on replacing a spring for the pull rope so hope this helps you.
First you will need torx driver long enough to reach the 3 screws behind the blade, take them off and the whole blade assemly comes off the gas tank unsnaps where you can set it off to the side, you nect come to a clutch remove the nut careful not to scar the clutch then there are 2 plastic dogs to be removed remove them then pull clutch off, Now your at the rope housing you may have to use a screw driver to get this out but there you are the rope and spring assembly! hope this helps if not to late.

Cut the hose diagonally (to create a point). That will make it easier to get into the gas tank. Once through the tiny hole, cut it straight to go into the fitting.

What I do is turn the edger on its side (blade facing you), then I take a large screwdriver and put it in one of the screw holes that holds on the blade cover. That will stop the blade from turning.

i just let the blade hit the concrete and that holds it then take nut off counter clock wise.

i take that back the nut comes off clock wise sorry

It is not hard to replace the fuel line. Slide it off of the carb and the tank. Now pull it though the body.

Yes, it is very difficult. The replacement hose is a bit larger than the hole it has to go through. This is so it forms a perfect seal and does not leak. NO, do not drill the hole larger thinking you can make up the difference with something like Seal-All, it just does not work like they say.