Echo CS-310 Instruction Manual

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Echo CS-310 Instruction Manual Manual pdf 25 page image

25CS-3101. Before adjusting carburetor clean or replace air filterand muffler “Spark Arrestor Screen”.2. Make sure the bar and chain are properly adjusted.3. Start engine and run several minutes to bring to oper-ating temperature. Flash choke twice during warm-upto clear any air from the fuel system.4. Stop engine. Turn “H” speed needle counterclockwise(CCW) to stop. Turn “L” speed needle midway be-tween full clockwise (CW) stop and CCW stop.5. Idle Speed Adjustment:• Start engine, turn “Idle” speed adjustment screwCW until the saw chain begins to move, then turnscrew out CCW until the saw chain stops moving.Turn screw out, CCW, an additional 1/4 turn.6. Accelerate to full throttle for 2 - 3 seconds to clear anyexcess fuel in the engine, then return to idle. Acceler-ate engine to full throttle to check for smooth transitionfrom idle to high speed. If engine hesitates turn “L”needle CCW 1/8 turn and repeat acceleration. Con-tinue adjustment until smooth acceleration results.7. Check idle speed and reset if necessary as describedin item 5. If a tachometer is available idle speedshould be set to 3200 r/min.WARNINGCutting attachment must not move when unit is idling.CAUTIONWhen starting, idling adjustment speed should beadjusted to prevent the saw chain from moving.Correct idle speed is adjusted 3,200 r/min. or 1/4turn CCW from the point the chain stops moving.When you experience trouble with the carburetor,contact your dealer.Idle adjusting screwLow speed needle (L) High speed needle(H)High Altitude OperationThis engine has been factory adjusted to maintainsatisfactory starting, emission, and durabilityperformance up to 1100 feet above sea level (ASL)(96.0 kPa). To maintain proper engine operationand emission compliance above 1100 feet ASLthe carburetor may need to be adjusted by anauthorized ECHO service dealer.IMPORTANTIf the engine is adjusted for operation above1100 feet ASL, the carburetor must bereadjusted when operating the engine below1100 feet ASL, otherwise severe engine damagemay result.Engine Break-inNew engines must be operated a minimum dura-tion of two tanks of fuel break-in before carbure-tor adjustments can be made. During the break-inperiod your engine performance will increase andexhaust emissions will stabilize. Idle speed canbe adjusted as required.CARBURETOR ADJUSTMENTEvery unit is run at the factory and the carburetoris set in compliance with Emission Regulations. Inaddition, the carburetor is equipped with “H” (HighSpeed) and “L” (Low Speed) needle adjustmentlimiters that prevent settings outside acceptablelimits.