I have a Ryobi b3000 grass trimmer. it cuts ok butit runs rrough. when reving the engine at high revs, it smooths out. But i do not want to use it at high revs, as then the engine would not last very long. Is there any adjustments i can do? I have not tried anything yet, as i want to make sure that i have the correct info. Thank you very much for the answer and solution, if any. Nic.

Nic Swanepoel. RSA, February 2010