Echo CS-310 Operator's Manual

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Echo CS-310 Operator's Manual Manual pdf 43 page image

CS-310 MAINTENANCEX7503275401 43© 02/2019 ECHO Inc.* Replacement is recommended based on the finding of damage or wearduring inspection.Carburetor AdjustmentEvery unit is run at the factory and thecarburetor is set in compliance withEmission Regulations. In addition, thecarburetor is equipped with “H” (HighSpeed) and “L” (Low Speed) needleadjustment limiters that preventsettings outside acceptable limits.Engine Break-InNew engines must be operated a minimum duration of two tanks of fuelbreak-in before carburetor adjustments can be made. During the break-inperiod your engine performance will increase and exhaust emissions willstabilize. Idle speed can be adjusted as required.High Altitude OperationThis engine has been factory adjusted to maintain satisfactory starting anddurability performance up to 1,100 feet above sea level (ASL) (96.0 kPa). Tomaintain proper engine operation above 1,100 feet ASL the carburetor mayneed to be adjusted by an authorized service dealer.If the engine is adjusted for operation above 1,100 feet ASL, thecarburetor must be re-adjusted when operating the engine below1,100 feet ASL, otherwise severe engine damage may result.1. Before adjusting carburetor clean or replace air filter and muffler “SparkArrestor Screen”.2. Make sure the bar and chain are properly adjusted.3. Start engine and run several minutes to bring to operating temperature.Flash choke twice during warm-up to clear any air from the fuel system.4. Stop engine. Turn “H” speed needle counterclockwise (CCW) to stop.Turn “L” speed needle midway between full clockwise (CW) stop andCCW stop.5. Idle Speed Adjustment:• Start engine, turn “Idle” speed adjustment screw “T” CW until the sawchain begins to move, then turn screw out CCW until the saw chainstops moving. Turn screw out, CCW, an additional 1/4 turn.TL H