Echo CS-420ES Operator's Manual

Also see for CS-310ES: Service data

Echo CS-420ES Operator's Manual Manual pdf 28 page image

28Cylinder fins (Cooling system) Check periodically. Clogged fins will result in poor engine cooling. Remove dirt and dust from between fins to let cooling air pass easily.Guide bar Clean before using.- Clean the groove of the guide bar with a small screw driver, for example.- Clean oil holes with a wire. Reverse guide bar periodically. Check sprocket and the clutch and clean the bar mount area before installation of the guidebar.Replace either or both if worn.Sprocket∗ Worn out: 0.5 mm The damaged sprocket will cause premature damage or wear of saw chain.- When the sprocket has worn out 0.5 mm or more, replace it. Check sprocket when you install new chain.Replace it if worn.CarburettorL: Low speed mixture adjusterH: High speed mixture adjusterT: Idle speed adjuster Do not adjust the carburettor unless necessary. To adjust the carburettor proceed as follows:- Turn screws in the needles (L and H) clockwise until lightly seated and return asindicated below.- Low speed mixture adjuster (L): 1 and 1/4 to 3/4 turns open.- High speed mixture adjuster (H): 1 and 1/4 to 3/4 turns open.- Turn idle speed adjuster (T) clockwise until chain begins to rotate.Then back screw 1/2 turn.- Accelerate to full throttle to check for smooth transition from idle to full throttle.Automatic oiler The discharge volume of the automatic oiler is adjusted to 7 mL/min approximately at7000 r/min, prior to shipment from factory.- To increase the delivery volume, turn the adjusting screw anticlockwise.When the adjusting screw touches stopper and stops, this position indicates maximumdischarge volume. (13 mL/min at 7000 r/min)- Do not turn the adjusting screw beyond the maximum or minimum limit of volumeadjustment.NOTEWhen replacing guide bar or saw chain, ask your ECHO dealer.1. Groove 2. Oil hole 3. Guide bar 4. SprocketCAUTIONWhen starting, idle speed adjuster (T) should be adjusted not to rotate the saw chain.When there is some trouble with the carburettor, contact your dealer.1. Oil adjusting screw 2. Decrease 3. Increase