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GRASS TRIMMER
OPERATOR'S MANUAL 19
Cylinder Exhaust Port
Level3.IMPORTANT
The cylinder exhaust port must be inspected and cleaned of excess carbon every 3 months or 90 hours of operation in order to maintain this engine within the emissions durability period. ECHO strongly recommends that you return your unit to your ECHO dealer for this important maintenance service.
CARBURETOR ADJUSTMENTEngine Break-In
New engines must be operated a minimum duration of two tanks of fuel
High Altitude Adjustment
High altitude adjustment is not required for proper operation of this engine.
Level2.
Tools required: Screwdriver,tachometer(EchoP/N99051130017)
Parts required: None.
NOTE
Do not adjust carburetor unless necessary. If you have difficulty, see your ECHO dealer.
Adjustment Screws
Idle Speed (A) | Controls throttle opening at idle. | B |
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Low(LO)Speed(B) | Controls amount of fuel at low speed and | C |
| supplementary fuel for smooth progression from |
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| idle to high speed. |
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High (HI) Speed (C) | Controls amount of fuel at full throttle |
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A