What are the fuel line specs for a Ryobi RGBV3100 Blower/VAC ?

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Fuel Line Configuration On 2 Cycle Ryobi Grass Trimmer
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Ryobi 2 Cycle Gas Blower Vac Owner Manual ManualsOnline com

This happened on my older Ryobi as well. Turns out it was the fuel lines. The ethnol in the gas made the lines swell up inside.

The primer does not necessarily need to work for the unit to run. It does have a choke to aid cold starts. However it is a good indication of something wrong in the fuel system. A primer bulb that does not return to shape or does so slowly indicates a clogged screen in the carb. Check the fuel filter and fuel lines. Replace the fuel lines if they are stiff or discolored, rebuild the carb and replace primer bulb.

Hello Brian,
I would visually inspect fuel lines entering/leaving tank that go to the carb. These tend to get brittle and crack. Also, some models have a rubber grommet that the fuel lines pass through entering/leaving the tank, these too get brittle and crack. If that looks good, you may have a stuck needle in carburetor and it will need to be removed and serviced. Hope this helps. Good luck and happy wrenching!

I’m happy to assist further over the phone at https://www.6ya.com/expert/layne_0fccff498c319c32

The small diameter line out of fuel tank (has filter in-tank on end) connects directly to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then "pushes" any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Again, on the primer bulb, the longer nipple has a line going directly from it to the tank. This is the return line. The shorter nipple on the bub has a line from it going to the metering chamber side of the carb. If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where sometimes the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank. Otherwise, the line should enter the tank for about 1/2" or so

The fuel line is replaceable by itself, you don't need a new tank. Just make sure you get the same size line or it will leak where it goes into the tank. Any local small engine repair shop should have the line. There are two lines that go into the tank, the pickup line has the filter on it. It not only filters the gas but keeps the end of the line down in the fuel.

try changing the fuel lines around and try again its easy to get the wrong

test for spark.
while spark plug is out - put finger over hole see how much compression there is.

If good spark - look for holes in fuel line.

take off the fuel filter and see if that works . if it runs then it needs a new fuel filter. keep me posted