Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer

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Ryobi stalls after starting.

I have a similar problem. I can easily start my Ryobi weedeater, but when I move the choke to "C" position it almost immediately stalls. Please help.

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Yep had same problem it would run for about 20-30 sec and then just stall.
solution is the diaphragm on the side of the carby I swapped mine for the same one in my blower and it fixed the stalling problem.
The diaphragm operates the fuel into the carb. loose fuel lines can cause similar problem.

Posted on Sep 13, 2009

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I had this problem. Frustrating! Here's what worked for me. There are two little nubs next to each other behind the "start/run" selector (aka choke) area on the carburetor. They are jets for your carb that control fuel/air mixture. If the world was a sensible place they would have slots for a screw driver - but it isn't - so they don't. You can still adjust them though.

The jet further away, or to the right as you're looking at it; is the one you need to adjust. It adjusts the running speed air/fuel mixture. The one on the left is to adjust the idle. Adjust the running speed jet first because after doing so you may not need to mess with the other one - it may idle fine or idle better.

Some people use a dremel to make a notch for a flat head screw driver, other people track down and order the elusive tool that supposedly lest you adjust it (called a pacman tool? Weird.) Anyway, I didn't get all technical with it, I marked the little nub with a pencil line so I could see the position, and then was able to use a little pair of needle nose pliers I had laying around to grab the thing and give it a half turn counter clockwise. Counter clockwise makes it richer (more fuel in the mix), clock wise does the opposite ("leans" it out.)

So half a turn ccw on that, fired it up, ran just fine. Was able to chop up a bunch of fallen trees and branches from the snowstorm we just had in Eugene. Idles fine too where before it would stall out if I didn't have the choke on.

Try this before you toss it, rebuild the carb, or go through some other extensive procedures. It's super easy and worked great with mine.

Thanks to the other people out there on the internet who's tips with similar problems with similar trimmers/pole saws/etc. showed me the way! Hope my comment might save someone else the hassle I was able to avoid.

Have a nice day and good luck!


Ryobi stalls after starting. - 3_26_2012_4_09_48_am.jpg3_26_2012_4_10_04_am.jpg3_26_2012_4_10_26_am.jpg

Posted on Mar 26, 2012

  • ssk1000 Nov 13, 2013

    Follow up: I later changed the spark plug and added a dash of this stuff in the gas tank, had to readjust the jet to the original setting. Runs even better now.

  • ssk1000 Nov 13, 2013

    http://www.berrymanproducts.com/assets/0...

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DO NOT REPEAT DO NOT BUY RYOBI JUNK I HAVE 2 NEW WEEDEATERS FROM RYOBI THAT RUNS BUT WILL NOT ACCELERATES....JUNK!! SAVE YOUR MONEY BUY A BETTER PRODUCT...!!!

Posted on Sep 13, 2009

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BUYER BEWARE!!!!! I absolutely agree with stockhunter, DO NOT BUY Ryobi WEED EATERS AT ALL.. Yes you can easily fix the problem by changing the diaphragm. But mine is only 5 months old and I've only used it four or five times. JUNK.
Don't know what else to suggest simply not Ryobi. Cheap but ****. rather pay more and get one that will last. VERY IMPORTANT!!! check and verify service and warranty before buying anything these days.

Posted on Sep 16, 2009

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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, 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!
* For this specific problem, i would say you should probably just adjust the "L" screw and hopefully that will help

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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!

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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!

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