Be sure the fuel line is the exact same size (id and od) as the one you are replacing. I had purchased a Fuel line from my local dealer - and after a few hours I figured out that it was the wrong size! He simply cut some line from a spool he had. Didn't bother to look it up! The line from this site was perfect! The id is important because the line has to Compress to go through the hole.
Seven screw, three case cover, two air cleaner, two carb mounting, pulled carb, drained tank, pulled old fuel line, treaded new one in, wire to thread, thread to angle cut fuel line. Reassemble, test, sharpen chain, retest…not exactly a doityourselfer, graduate degree in mechanical/industrial engineering and former medium/heavy mechanical. Get fuel line on carb prior to reassembly, line may need some stretching with a tapered punch.