Question about Ryobi 30 Cubic Centimeter Curved Shaft Gas Trimmer
You can adjust the 'H' - high speed needle by removing the plastic carburetor cover by removing the 4 torx screws. On the carburetor, there may be a 'L' and 'H' needle. (Ryobi used two different carburetors on this model and one may not have a 'L' and one may not be adjustable with common tools). If the 'H' needle is adjustable, start the machine, warm it up and go to WOT (wide open throttle). At WOT, turn the screw about 1/4 turn out or in and see if the engine speeds up. If it does, fine the point in which the machine gets the highest RPM's and then back it off about 1/8 turn.
Note: This is a sign of a carburetor that needs to be cleaned and rebuilt with a new fuel metering diaphragms which would be common if the machine is > 4 years old and you did not completely run the machine dry of fuel in the fall. Rebuild kits available for about $15 through local sources or $10 through ebay.
Posted on Sep 25, 2010
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Posted on Jan 02, 2017
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