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Old 08-04-2013, 10:54 AM
ducnut ducnut is offline
LawnSite Bronze Member
Join Date: May 2013
Location: central IL
Posts: 1,568
Originally Posted by dboyd351 View Post
The lo screw is turned in and out until the trimmer will accelerate quickly and cleanly off idle. The high speed screw is set so it will rev out well.
The low screw is the idle circuit. Adjust it, so that it cleanly idles. You may need to bump up the idle a bit, while adjusting.

The high screw will pickup from idle all the way out. I hold the machine wide-open and adjust until it runs cleanly. Then, I double-check that it will cleanly accelerate.

I use 1-1/2 turns as a base.

Be sure your filter is clean, are using fresh gas, and are on a new plug.
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