Question about Ryobi 30 Cubic Centimeter Gas Brush Cutter

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Ryobi bc30 gas trimmer wont run full speed will run at half choke but not full speed, when moved to run it dies.

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I have the same issues. I think the solution is to toss it and buy a real one from an actual lawn care dealer that sells quality brands. Yes, they will cost about $200 and up, but it's worth it to have something alot more reliable, and can be worked on when needed. I know I have wasted more than that extra $100 in time/effort with this thing, and I still plan to buy a new one. So now, that quality trimmer will cost more because of the money I wasted on the Ryobi in the 1st place.

Posted on Jul 22, 2009

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I went to the extreme here, I bought a bottle of "fuel injector cleaner" made from Jet fuel blended with Marvel mystery oil (only enough to fill the tank about 20%). New plug, prime pull and go. It runs like new and wide open.I also sprayed a little carbureator cleaner in the plug hole and let it wash down. These seem to build heavy carbon quickly. Give it a shot, when it runs it is a great machine. when it does not run it is a POS.

Posted on Sep 03, 2009

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Ryobi is a piece of junk

Posted on Nov 19, 2009

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I Have the same problem with mine. I have cleaned the carb. I have sent e-mails to ryobi, with no repley. The best solution I think is not to by these products anymore. Iplan on giving the trimmer to my kid so he can take it apart and lean the parts( a 100 dollar teacher).. I plan on going back to wal-mart and buying a weed eater type trimmer. The last one of thoses I had lasted over 4 years( it cost 89 bucks).I will never recomend RYBOBI products to any one. The 30c trimmer I got from HOME DEPOT( they woont do any thing either) cost 99 bucks and didnt even last 4 months......... Sorry you wasted your money on that RYOBI peice of juck. Thanks

Posted on Jun 29, 2009

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I know this an old thread, but this is what I found with mine. I noticed it had an oily substance collecting on the back and on the gas tank. It would only run on half choke. I took it apart and found that the head was loose from the body, and therefore loosing compression. I made another gasket for it with a roll of FelPro gasket material instead of ordering one. I replaced it with the gasket I made, tightened the olts, replaced the spark plug and presto....LIKE NEW! I will try and post a video of it on YouTube in the next few months. I just need to find the time to do it. But the head seemed to vibrate loose, so check it out first and replace that gasket before tightening the bolts. Good Luck!

Posted on Apr 16, 2011

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3 Answers

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.

May 21, 2011 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

Gas Trimmer will not stay started


Many times with a gas mix, after sitting for a while, the mix separates and gums up the carb. Taking the carb off and soaking it overnight in a parts or carb cleaner and running carb cleaner through the tank and gas lines will cure this.

Jul 02, 2008 | Ryobi 15" Electric Factory Reconditioned...

1 Answer

I have a ryobi weed eater clean carb change filter and spark plug wont run off choke


I have the same problem. It will run if I put it halfway between Half Choke and Full Choke. But, just dies if I put it on Run or Half Choke. Don't ever loan your WE to anyone, They might just try to run it on straight gas--That is what happened on another week eater that I had.

Mar 27, 2010 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

It wont start


First, make sure that the gas mixture is correct (gas and oil mixed in the right proportion). Next, press the primer bulb 3-4 times, turn the choke lever on to Full Choke, and pull the starter cord until the engine seems like to wants to start, but dies. Next, switch the choke lever to Half Choke and start the gas trimmer, giving it gas by pulling on the trigger. Once it has warmed up fully, you may be able to reduce the Half Choke to No Choke, although my 20+ years of experience with dozens and dozens of models tells me that many trimmers run better, although smoking slightly, when you keep them at Half Choke. One last tip, when pulling the cord, try pushing the trimmer away from you with the opposite hand at the exact same time that you are pulling the starter cord--the equal and opposite push-pull technique may sound like something from karate (and it is, in a way), but it is really helpful when trying to start trimmers. Best of luck, Bill

PS: Check you owner's manual (at home or online) for the proper gas/oil mixture. Empty any old gas out and replace the spark plug, if required.

Oct 10, 2009 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

Engine starts but dies when I pull throttle trigger


you need to adjust the high speed needle turn it out in 1/4 increments as you throttle it, low speed may have to come out alittle but do high speed first. I had to answer this as I use to have a pastor john in sturgeon bay, miss him alot.

Jul 22, 2009 | Ryobi Garden

1 Answer

Trouble starting gas trimmer


Yes. It sounds like you need to clean the carburetor. Take the carb. off, disassemble and spray with carb. cleaner. Make sure to clean the small screen in carb. Clean the small portals with a Den Tek Brush, (used for cleaning between teeth). They work great for this job. Reassemble carb. and try starting. If this doesn't cure the problem then you will need to buy a new carb. kit and replace the needle valve, gasket(s), diaphragm, & small screen.

Jim

Jun 03, 2009 | Ryobi Garden

1 Answer

Ryobi gas trimmer stalls when lowering the revoutions


do you have the right kmix fuel to addat start on choke let run tell it dies then pump the ball on half choke and chage the plug

May 15, 2009 | Ryobi 15" Electric Factory Reconditioned...

6 Answers

My ryobi bc30 trimmer runs but when I give it gas, it dies


I have the Ryobi BC30 trimmer, also. For a year now, it would only work on half choke. Putting it in run position would cause it to quit. Also, it would no longer idle...it would quit if I idled it for too many seconds. I had not used it in a long while. It would then not run in half choke position and would die in idle. I figured out that if I kept moving the choke lever between full choke and half choke, I could keep it running. I checked the internet for what would cause this. I was using NEW gas and oil. I had replaced the fuel tank because of a hole in it that nothing would seal. This means I had a new tank, fuel filter, and fuel hoses. So, this was not the problem. Since it runs fast between choke and half choke, the basics of the system were fine. I took the carb apart and cleaned whatever I could. Took out the little fuel filter screen and cleaned it. No difference. I took off the exhaust module and looked at it and the screen that is the flame arrestor (mentioned on the internet). It was fine. Of course, folks mention using carb cleaner spray into the air filter port (oh yeah, I had replaced the air filter with a new one earlier). Sprayed repeatedly and no difference.
So, here is WHAT DID WORK! Took the carb off (pretty easy (two nuts to remove, take off the two fuel lines, and remove the little wire that controls the throttle)). Now, take the carb apart carefully screw at a time...geez, there are only two sides! Be careful with the gaskets. One has a thick gasket and a thin one sandwiched together. Pry these apart and clean them (with the carb cleaner spray you already bought). Put them back together and lay aside. Take the other side of the carb apart (another couple of screws?). Need I say to lay everything you take apart on the ground in the order you put them back together? Now you have several big pieces of carb and several smaller plates from each side. Now take your carb cleaner can with the small red straw. Place the straw in EVERY hole you can find on the big pieces and small pieces. Either where goggles or some kind of eye protection. BLAST out all these holes until either fluid comes out ANOTHER hole or obviously this hole goes nowhere. If these holes spray out fine elsewhere, then spray it out backwards through those holes! Be sure to take the fuel filter screen out of its hole (you will just have to find this screen in a fairly large hole in one of the BIG carb parts). Clean the screen by spraying the carb cleaner into it until you are sure it is clean. Place the red carb cleaner straw into the screen filter hole right on the TINY hole at the bottom. Look at the reverse side of the carb. There is a mechanism on a rocker arm that moves up and down with a little push on a flat metal piece. This is the reverse side of where the big hole is that had the screen in it. Blast this out with the carb cleaner while pressing on and off of the flat metal bar on the reverse side. You will see that the flat metal piece is attached to a pole that disappears towards the large hole on the other side (the one that had the screen in it). While blasting from both sides, you will only get a little spray come through. Just keep blasting to clear this component. This is really the only tricky part to clean. ALL the other holes generally will either clear out pretty quickly or there is nothing in the hole. The idea is to BLAST ANY hole you can find in ANY of the parts. Like I said, be careful because while you are blasting TINY holes, you will get a good bit of blast back from the hole you are in. This will cause spray to hit your hands, face, eyes, etc. BE CAREFUL. Don't be a wimp, just protect your self. The carb cleaner is under pressure. It will come out COLD. If you have cuts on your hands, it might even sting. It will also DRY out your fingers if you get enough of this stuff on you. Either wimp out or keep going. If your fingers are getting too cold because of the over spray or back spray, or the carb is freezing, then back off for a bit. This is a disclaimer! Right now my fingers are VERY clean and VERY dried out (but my BC30 works fine!).
Ok, you have sprayed all the holes and figured out that any thru-holes is now clear. Put all the parts and gaskets back together. Reattach the fuel lines to the proper spouts, reattach the throttle control s-curve wire properly. Reattach the carb to the unit with the ONLY TWO nuts. You are now all together again with a really clean carb.
Fill the fuel tank with FRESH GAS from the gas station with the proper oil mixture (come on....just buy the small oil bottles that you use the whole bottle per a gallon of gas).
Ok, you are now starting out with what ought to be a VERY clean carb. THAT problem should be over! What may not be over is that the idle and the high speed may not be working. Remember that my unit would not idle...it would cut off at idle. This procedure cleaned that right up!!!!!!!!!!! The other problem was it would ONLY run at half choke and then less than half choke. Run position would stall and stop.
So, now you need to start the blasted machine. I tried using the proscribed method using FULL choke for a bit, and then half choke. I had waited awhile letting the carb cleaner to evaporate. Don't know. It did not want to even start for awhile. SO, I tried to get it to start in the manner that was working BEFORE I started all this junk. I put the lever in a position between full choke and half choke. This was a very hard position to maintain in order to keep the lever from moving. I had to press the fuel bulb a few times every now and again. I was pressing the FULL POWER button. All of a sudden, it started. And what to my surprise, when I took my hand off the throttle, IT STAYED running! This was PROGRESS!
Now, I put the lever in half choke position and pressed the throttle button. It cranked right up! I was at least back to where I was a year ago. When placing the lever in run position, it tried to stall out as it did a year ago. That was ok, I was making progress. I fiddled around a bit keeping it running and ascertaining that in half choke mode AT IDLE, the unit STAYED ON also at full throttle. I am stoked because I feel the carb is fully cleaned and none of the holes are clogged. So, NOW I feel the only problem is the screw that controls the jet of fuel when the unit is in RUN mode is the problem.
MY UNIT has the TWO screws on the side of the carb. The one closest to the engine controls the IDLE speed of the unit. Since, my machine now idles without cutting off, this screw must be adjusted fine. This also means that one of the holes that deals with the idle was clogged...and my efforts of blowing out ALL the carb holes has fixed this problem. The screw that is FARTHER away from the engine controls the HIGHER speed which includes the RUN position.
So, I took a flat head screw driver to adjust this screw (the OUTSIDE screw). I started the machine in the HALF-choke position that was WORKING. I then turned the outside screw COUNTER-CLOCKWISE a quarter turn. I then moved the lever to the RUN position. It STILL RAN! WOW! But then, as I revved the engine up and down, it slowed down a bit and made me think it might quit. Put it back in half-choke position and it ran fine and revved back up. I then adjusted the outside screw some more in the counter-clockwise position and went back to the RUN position with the lever. I am making progress. I reached a point where I could leave the lever in the RUN position and kept adjusting the OUTSIDE screw counter-clockwise until the unit would go from idle to full speed in the RUN position without stalling or sounding funny. The end result was that the full power was operational and when I let the throttle go, the unit revved down but kept running fine.
My RYOBI BC30 now runs just as well as it did when I first bought it. I did NOT have to buy a new carb OR a carb kit! I was careful with the existing gaskets (one gasket was broken on the OUTSIDE of the screw it went through but had no effect (the outside was far enough away from the inner important area)).
So, here is the deal. If your Ryobi BC30 only runs when you have it set on half choke or less instead of the RUN position (BUT IT RUNS), then your CARB probably has some plugged up holes in it. If when in idle, it quits, then some hole(s) are clogged. The fix is to BLOW out these holes! I used carb cleaner over and over again until I felt the holes HAD to be clean (spray easily came out somewhere else). Some people say to use canned air to clear out the holes. I had the carb cleaner but not the air. So, I did it with the carb cleaner pressure. This worked.
I must say that EARLIER in my trouble shooting actions, I found bits and pieces of what I figured were bits of gasket material which I removed early on. When you take the two nuts off those LONG two screws that hold the carb to the unit, it is hard to remove the plastic air filter unit. Because of this, it is possible to strip some plastic off the air filter unit that might get into the system. So, be careful here. I had to force the plastic unit off...it simply was very tight...so be aware of this. It was so tight, that I looked many times to see if there was something else holding on to it.
Last deal. You can clean the carb. You can adjust the screws if your unit has them. I have heard that later modules do not have the idle adjust and high speed adjust screws. If yours does not, then follow my directions to clean the carb. I have no idea what to do about the screw adjustments if your module does not have the screws. Troup Nightingale

Oct 05, 2008 | Garden

1 Answer

Gas Trimmer will not stay started


My straight shaft trimmer will idle but dies when the I pull the trigger.

Apr 03, 2008 | Ryobi 15" Electric Factory Reconditioned...

3 Answers

Problem with gas trimmer staying started


Carburetor is out of adjustment. there are two carb adjustment screws on the side of the Carb. they require a special tool that is only $5 from your local mower repair dealer. those screws are the idle and Hi speed mixture adjustments. the carbs on Ryobi are set too lean. turn counterclockise to richen the mixture. just turn one eigth of a turn at a time. start w the hi speed.

Apr 03, 2008 | Ryobi 15" Electric Factory Reconditioned...

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