Echo PB-250LN Operator's Manual page 24

MAINTENANCE
1. Start engine, run at idle for one minute.
2. Complete warm up by running at full throttle for 5 minutes,
operating choke twice to clear air from carburetor chambers.
3. Check idle speed and reset if necessary. If a tachometer is
available, idle speed screw (A) should be set to the
specifications found on "Specifications" Page of this
manual. Turn idle screw (A) clockwise to increase idle
speed; counter clockwise to decrease idle speed.
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A
PB-250LN
X7501183303
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