Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer

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My ryobi weedeater will start in the choke or low position but will die when you switch it to the middle or high position.

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It's the muffler. Everyone thinks fuel, carburetor, mixture. They're wrong. The muffler is clogged and the unit can't be tuned to high throttle until you clean it.

Steps: Remove the back housing to access the muffler. You may want to remove the gas tank to avoid a spill. Remove the muffler (2 large screws). Remove the muffler door (3 small screws). The screen should be cleaned using a pin (poke out any hardened material). Most important: The muffler door is 2 parts. Pry it apart and scrape off the burnt carbon that is clogging the exhaust path. Re-assemble and start.

Posted on May 03, 2010

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Posted on Jan 02, 2017

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Here was my solution:
I was having problems with my ryobi cs30 weedeater also. It would start up fine on full choke, but i could not give it more than half throttle or ever take the choke off or it would stall out. I replaced fuel mixture, spark plug, spark arrestor/exhaust, fuel lines, cleaned carb, and still nothing! I was considering getting a better machine. Then i decided to play with the carb adjustments.(on my cs-30, they are two screws on the carb that have a "L" and "H" next to them) I dont think you can get the specialty tool for adjusting the carb unless you are a repair tech, so i just took a Dremmel tool with the circular cut-off wheel to the head of the specialty screws and made them into "flat-head" screws so i could adjust them with a regular screwdriver (if you dont have a dremmel too, get one!) (As i was cutting into the head of the screws, i also cut into the casing protecting the head of the screws that was in the way, this does not cause any damage to the unit, that casing is only there to keep "un-certified" people from adjusting it for themselves.)
Now to the easy part: The "L" screw adjusts the idle fuel mixture and the "H" screw adjusts the full throttle fuel mixture. turning the screws clockwise make the machine run leaner (less fuel) and counter clockwise makes it run richer (more fuel).
-I started out by turning each screw 1/2 turn counter clockwise and started it up, then as it was idling, i started adjusting the "L" screw as i was moving the choke position to run, after a few full turns counter clockwise of the "L" screw, it was idling perfectly in the run position, then i did the same thing the the "H" screw while holding down the throttle and i got it to run perfectly in the run position. Now it is running way better than it ever has. I hope this helps everyone.
Good Luck!

Mar 27, 2009 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

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