Articles, Hedge Trimmer

Trimmer Repair – Replacing the Fuel Return Line (Ryobi Part # 791-181086)

Hi, I’m Mark from In this video, I’m going to show you how to
replace the return fuel line on a Ryobi trimmer. The return fuel line completes the fuel system
circuit from the fuel tank to the carburetor, the primer bulb, and then, back into the fuel
tank. The return line, as well as all of your other
fuel lines, will eventually begin to deteriorate and break down. They’ll harden and crack. At which time, you’ll need to replace them. Replacing the return fuel line is easy to
do, and I’m going to show how. Return fuel lines, as well as many other parts,
can be found on our website. Let’s get started.Before removing any of the
fuel lines from the carburetor or the lines from the tank, you want to make sure that
you drain any gas that might still be in the fuel tank. I’ll begin by removing the return line from
the primer bulb as well as from the fuel tank. You’ll notice that the new return fuel line
is much longer than the line we removed. I’ll go ahead and shorten it up. The length here isn’t real critical, you just
don’t want too much excess in the fuel tank, about an inch, inch and a half is perfect.Now,
I want to take one end of the line that we’re going to install and cut a slight taper on
the end. This taper will make it much easier to thread
the line into the fuel tank. Now, install the square end of the return
line back onto the nipple on the primer bulb. I’ll use a little bit of two-cycle oil to
lubricate the end of the return line that passes into the fuel tank. The oil will make it easier to insert the
line into the tank. Now, just thread it back up through the hole
and into the fuel tank. That’s how easy it is to replace the return
fuel line on a Ryobi trimmer. If you found this video helpful, be sure to
give us a thumbs up and leave a comment.


  1. Rick Gershberg Author

    helpful videos, but according to the website, one has to buy all 3 lines- the fuel filter line, the primer hose assembly and the return line- separately for a complete repair @ $30. seems excessive for several inches of hose and a couple of plastic parts. Any reason you don't offer complete kit at a more reasonable cost?


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