Tip & How-To about Garden

Cleaning A Small Engine Carburetor

"My small engine will only run at an idle or half choke."

If you are having trouble with your, Trimmer/Weed Eater, Chainsaw, Leaf Blower, running at full speed; or it starts and runs for a few seconds and dies, then you will need to check the fuel lines first, and then the carburetor.

1. Check the Fuel Lines for cracks/breaks. If they are bad then go to: ( www.fixya.com/support/r6078121-fuel_line_relacement_trimmer_weedeater )

If Fuel Lines are o.k., then:

2. Check the Primer Bulb for pin hole(s) or cracks. This will cause it to start and then die. Replace it if it's bad. Try to start before proceeding any further. If you are lucky, this will be your only problem. If the Primer Bulb is fine, then:

3. You will need to disassemble the carburetor and spray with carburetor cleaner.

4. Use a Den Tek Brush, ( http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152 ), to clean the small portals in carburetor, including the jet, if there is one. These portals can become blocked.

5. If the carburetor has sat for a few months with old fuel in it, you may have to place the a. in carb. dip before puting the new parts on it. (The fuel turns to varnish over time, causing the carburetor to be paralyzed.) If you don't have carb. dip, you may be able to take the carb. to your local parts store, where they may do it for free.

6. Make sure the small screen, that sets down in a pencil eraser-sized hole, is clean. Take the screen out with a razor blade or utility knife. (Be careful not t scratch the carburetor while doing this.) Make sure that you can see daylight through it. If you have a 3 yr. old machine or older, the screen is probably clogged. You should replace it! This small screen will come with a New Carburetor Kit when you purchase one. The New Carburetor Kit will also come with a diaphragm, gaskets, spring and needle valve, and some other very small parts. If you have a New Carburetor Kit, go ahead and replace it all while you are in there.

7. Reassemble the carburetor.

8. Make sure the air breather is clean.

9. Start like you normally would.

Good Luck!

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Key Words: Weed Eater, Trimmer, Chainsaw, Leaf Blower, Snow Bower, Pressure Washer, Carburetor Dip, & Varnisized

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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

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...

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