Echo ES250 Operator's Manual page 28

OPERATION
Use reduced speed only when
performing light-duty tasks or to
comply with local noise
regulations. Continuous low
speed operation may allow fuel/oil
residue to build-up on the piston
and cause rapid build-up of
carbon on the spark arrestor
screen, resulting in overheating
and engine damage. To reduce
harmful build-up, run engine at
wide open throttle for at least 5 minutes every hour, and inspect/clean
the spark arrestor screen after approximately 40 hours of operation.
Read the Safety Section carefully.
To avoid engine damage due to over-revving, do not block blower
pipe.
1. Use only during appropriate hours.
2. Allow the engine to warm up at a fast idle for a few
minutes.
3. Control engine speed with
throttle trigger (F), or for
continuous use, set engine
speed with throttle position
lever (B). Rotate throttle
position lever forward for
lower speed, back for higher
speed.
4. Use lower speed to blow
debris from hard surfaces.
5. Additional speed may be necessary to clean debris, snow, etc. from
lawns and flowerbeds.
28
B
F
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ES-250
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