Trimmer Repair - Replacing the Carburetor (Ryobi Part # 791-182875)

http://www.ereplacementparts.com/carb... Click here for more information on this part, installation instructions and more.

This particular carburetor is specific to Ryobi manufactured brands, including Ryobi, Yard Man and MTD. To find a carburetor specific to your model, visit eReplacementParts.com.

If your string trimmer is showing any of these symptoms; replacing the carburetor assembly could solve your problem:
1) Engine running poorly
2) Engine not starting
3) Fuel left sitting in trimmer
4) Engine runs roughly
5) Engine won’t stay running
6) Excessive fuel consumption

eReplacementParts.com part number: 791-182875

Tools used for this repair/replacement:

1) Receptacle for draining fuel
2) Torx / Phillip’s drivers
3) Long-nosed pliers
4) Long Screwdriver
5) Cutters or scissors
6) Two-cycle engine oil

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[ VIDEO TRANSCRIPT ]

Hi, I’m Mark from eReplacementParts.com. In this video, I’m going to show you how to replace the carburetor assembly on a Ryobi trimmer. The carburetor creates the air-fuel mixture that allows combustion in your trimmer’s engine. The carburetor tends to be sensitive to dirt and debris, which can plug it. Also, if you allow fuel to sit in the carburetor for an extended period of time, it will tend to varnish the inside components of the carburetor, which will also plug them.

It is possible to rebuild your carburetor. However, if that’s a repair you don’t want to do yourself, or if the carburetor is so badly plugged with varnish and corrosion, then this kit will allow you to replace it. Replacing the carburetor is easy to do and I’m going to show you how. Carburetor assemblies, 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’ll want to make sure you drain any gas that might still be in the fuel tank. I’ll begin by removing the rear cover. Now I’ll remove the two screws that secure the carburetor to the engine. Now you can pull the carburetor away, disconnect the throttle cable, and remove the fuel lines. Now reattach the line that goes to the primer; this is the one next to the adjustments.

Now, remove the incoming fuel line from the fuel tank. The fuel filter nipple passes through the bottom of the tank, and this makes for a very tight connection. The easiest way to remove this, since we are going to be replacing it anyway, is to just simply cut it off. So first, I’ll pry the plastic washer away from the fuel line. And now, just cut that off flush to the tank. Now, use a small screwdriver to push the remainder of the fuel filter through and into the tank. And now, tip the trimmer so that the fuel filter falls out of the gas tank.

Our carburetor replacement kit includes a new fuel filter with fuel line, and a second piece of fuel line. The second piece, you actually will no longer need. The older models used to have a short piece of line between the fuel filter in about this point here. The line wasn’t cut, and this fitting was installed to extend the line to the carburetor. But the current kits include a long piece of line, and this is no longer needed.

Now, I’ll install our new fuel filter and fuel line assembly. There’s a couple of things I’m going to do to prepare the line to go into the tank a little easier. First, I’m going to cut a taper on the end of the line, and I want to cut off as little of the line as possible here. Next, I’ll take some two-cycle mix oil, and just lubricate the line so it will slide through the hole in the tank a little easier.

And now we can install the assembly into the fuel tank. I’ll insert the fuel line into the tank, and try to snag that taper that we cut on the line, on the hole that the fuel line passes through. Then I can pull it through and work the nipple on the fuel filter into the opening.

The fuel filter and line kit includes a small plastic washer. This washer goes over the fuel line and up over the nipple on the underside of fuel filter.

Now, insert the fuel line through the hole in the backside of the carburetor plate. I’ll go ahead and cut that end square (that we tapered earlier), and I can reinstall it to the carburetor. Now, I’ll install the carburetor gasket that’s included in the kit.

Now, I’ll reinstall the throttle cable back onto the carburetor throttle linkage. And I’ll secure the carburetor, as well as the choke plate, with the screws. And now I’ll reinstall the rear cover with the air filter.

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