You need to rebuild the carburetor. You will need to go to an outdoor power & equipment store of some kind to get a carburetor kit for your specific trimmer. It will come with various gaskets, (some of which you won't use), a needle valve, and a small screen that goes in the carb. Replace all old parts with new. New primer bulb is sold seperately. When you have the carb. apart, you will also need to clean the small ports with a Den Tek Brush (used for cleaning teeth). Use carb. cleaner when cleaning.
Jim
SOURCE: what is the fuel mixture on the ryobi cs30 weed
Mine says 50:1 on the gas cap. It's a 2006 CS30. Model #RY30120.
2.6 oz of 2cycle oil to i gallon of 89 octane fuel is what i use and have no problems
SOURCE: trying to replace pull cord on ryobi cs30. How do
how do I repair/replace the pull cord on my Ryobi CS30?
SOURCE: Ryobi CS30 Trimmer starts and
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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