Would help to post up some photos of the inside of your Stihl 045 carb box & the fuel line.
I’ve never seen an “outside fuel line” nor a “carburetor fitting” on an 045 saw.
[/
I am new to working on chainsaws so I am not familiar with some of their terminology of some of the parts So after a lot of research I found out the things that I asked here. The carburetor fitting is located on the bottom of the carburetor it is at a 90 degree angle and the Impulse hose goes into it This is what I called the. “ outside fuel line” On my Husky 395 a Impulse hose Carries pressure Not fuel to the carburetor “So I was confused” At first I didn’t want to just take things apart because of not knowing . I didn’t get a quick response here so I dug into the saw If Stihl didn’t use the terminology Impulse hose I wouldn’t been confused. I have both the Impulse hose and fuel line ordered.