Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer

4 Answers

Carb adjustment hello ,,,, I have 2 Ryobi cs30 string trimmers with the round choke adjustment,,( full choke,,1/2 choke, and run )... it seems to me that the air/fuel mixtures on both trimmers are out of adjustment , even though they are factory preset , and have some sort of weird black caps or something covering the adjustment screws.. the trimmer is very touchy and I must run it at about 3/4 choke to make it accerate properly ,,, being a lil OLD SCHOOL that tells me that the carb needs minor adjustment ... is there a sperial tool available that allows the user to make carb adjustments ? ,, I read the post from the guy that used a dremel tool to cut slits in the ends to allow him to use a flat head screwdriver to make adjustments ,, but i'd rather have the proper tools to do the job right !

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  • debbie_isa May 04, 2009

    I have the same problem, I need to adjust my Ryobi string trimmer, RY30260 is the model. The two black adjustment screws do not seem to have caps, and are extra tiny and recessed. How can I adjust without a special tool, or how do I know what tool I need. There are several on EBAY but no diagram of what type screw they fit, so I am hesitant to buy or try. If I could at least get them out ONCE I would happily grind a slot with something. Dremel or otherwise. HELP, I love this weedeater, or at least I did until this season when it won't run except on choke. Thanks!

  • JERRY ABELL
    JERRY ABELL May 11, 2010

    well would it do me any good to tell you what to do since you already made your mind up

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  • 246 Answers

Hello:

>>The Following is the Instruction File for Setting the Air Mixture Screws. Any Input is Appreciated. The Procedure is the Same for 1 or 2 Mixture Screws, Just Use the Instruction File and Skip Over the Section with the Missing Mixture Screw ( Usually the H Mixture Screw).
>>Now Setting the Air Mixture Screws:
>>****Turn the Idle Air (L) and Main Air (H) Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Set the Throttle Full Open, Start the Engine.
>>Turn the Main Air (H) Mixture Screw Clockwise Until Proper Revs are Obtained. **Carefully Use your Finger and Move the Governor Arm to Rev the Engine (on Chainsaws and Trimmers Use the Trigger to Rev the Engine) Until you Reach Max RPMs (on Chainsaws and Trimmers, the RPMs are Not Set to MAX. Set to Max and then Reverse the Setting Screw 1/4 or 1/2 Turn. If the H Mixture Screw is Set too High; the Engine will be Starved for the Oil in the Gas and Damage the Piston and Jug/Cylinder) and the Engine is Running Proper at Full Throttle Up a Grade. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs.**
>>Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required.
>>Now Set the Idle Air (L) Mixture Screw so there is No Hesitation when Rapidly Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
>>If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy.
>>Thanks.

Respectfully

John

Posted on Apr 21, 2009

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You need Pacman Adjustment tool #308535003 if your carburetor has the "Pacman" shaped screw heads. I found this tool on Ebay

Posted on Jun 10, 2010

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I overcame the problem of not having the pac-man tool by using the nozzle off a tube of bathroom sealant. I trimmed the tapered end of the nozzle to provide a snug fit when pushed onto the carb adjustment nut - job done !

Posted on Jul 16, 2012

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This is the perfect question but nobody has answered it! Lots of fairly unrelated answers... what tool is needed here?

Posted on Jun 20, 2009

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Ryobi CS30 Trimmer starts and runs in full choke and half choke but stumbles and stalls on run. Not up to full rpms when in full choke and half choke....


You probably need a slight carburetor adjustment. Try to turn the L mixture screw (the one near the bottom of the carburetor on the air filter side, closest to the engine) 1/8 to 1/4 of a turn counterclockwise. These mixture adjustment screws ( L and H) have odd heads on them and conventional tools won't turn them. I use an automotive type plastic wire connector (around 22 gauge) with a ring terminal end which I can hold. Tap the plastic end of the wire terminal connector onto the head of the screw with a small hammer and this will enable you to adjust the L screw. This adjustment will increase you high speed side and possibly allow it to run off choke in a regular manner.

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Flush out the carb with a varnish remover.

Open high speed needle valve 1/8 turn farther, then turn in while running until it just smooths out.

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1 Answer

Husgvarna string trimmer stahls.


Try getting some carb and choke cleaner and spraying down the carb. You might have some varnish in the carb and it won't let the fuel flow properly. My ryobi 4 cycle trimmer does that every year. I clean the carb and it usually runs decently.
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I HAVE A MODEL775R RYOBI GAS TRIMMER 31CC IT HAS NO SPARK.


you probably made the mistake of leaving it in the shed over winter with gas in it.
in the carb there is a diaphgram that oumps this fuel in via the motor vibrations.
said diaphgram had been ruptured due to drying gas in the carb. the solver to this is to either have a small engine mechanic replace it or the whole carb or get a new one, and i would suggest you get the cs26 model instead. i have a cs30 and cs26 and i have had less problems with 26. it only has two chokes.
you prime it.
you push lever to start, closing all but a little bit of carb,giving engine much richer mixture.
you squeeze trigger, opens halfway/full, as there are two chokers in the carb, on controlled by lever and another by throttle.basically now you haave half choke.
you release trigger, goes back to 7/8 choke to keep at idle but not running. your ready to go.
on the cs30 its much more complicated:
ful choke
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pull 4x
half choke
pull till start.
wait ten seconds of running at idle rotate to run
good to go. but these guys have porr design. if you take off the back cover and look above fuel tank on cs30, the crank is RIGHT SMACK THERE and not better secured like in the '26 model.
that's what the little circular hole is in it.
anywho, the diaphgram is ruptured, and you probably haven't noticed that in addition you have gas leaking out the carb's air intake.

May 30, 2009 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

Ryobi straight gas trimmer, runs rough at idle and up to 1/2 speed, but great at full speed. Bought a reconditioned one.


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

Apr 11, 2009 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

I have a Ryobi trimmer and when I start it will not stay on


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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