OPERATOR’S MANUAL CHAIN SAW CS-490 WARNING Read the instructions carefully and follow the rules for safe operation. Failure to do so could result in serious injury.
RULES FOR SAFE OPERATION 1. Fatigue causes carelessness. Be more cautious before rest periods and before the end of your shift. 2. Personal protective clothing required by your safety organizations, government regulations, or your employer should be used; otherwise, sung fitting clothing, protective eyewear, safety footwear and hand, leg and hearing protection should be worn. Note:Personal protective clothing should meet the requirements of applicable Standards. 3.
CONTENTS RULES FOR SAFE OPERATION............................................................................. SYMBOLS AND SIGNS............................................................................................ PACKING LIST.......................................................................................................... NOMENCLATURE OF PARTS................................................................................. OPERATOR SAFETY......................................................
SYMBOLS AND SIGNS DANGER CIRCLE AND SLASH SYMBOL The safety alert symbol accompanied by the word “DANGER” calls attention to an act or condition which WILL lead to serious personal injury or death if not avoided. This symbol means the specific action shown is prohibited. Ignoring these prohibitions can result in serious or fatal injury.
DECALS Part Number X505-009450 Locate this safety decal on your unit. The complete unit illustration found in the “NOMENCLATURE OF PARTS” section will help you locate them. Make sure the decal is legible and that you understand and follow the instructions on it. If a decal cannot be read, a new one can be ordered from your ECHO dealer. PACKING LIST The ECHO product you purchased has been factory pre-assembled for your convenience.
NOMENCLATURE OF PARTS 4 5 3 6 2 7 8 9 11 13 12 10 23 22 21 20 X505-009450 19 18 1 24 14 15 16 17 Part Number X505-009450 * If a decal cannot be read, a new one can be ordered from your ECHO dealer.
NOMENCLATURE OF PARTS 1. Operator's manual - Included with unit. Read before operation and keep for future reference to learn proper, safe operating techniques. 12. Saw chain - Chain, serving as a cutting tool. 13. Bar tip guard - Anti-kickback device attached on the bar nose. 14. Oil tank cap - For closing the oil tank. 2. Spiked bumper - Device, fitted in front of the guide bar mounting point, acting as a pivot when in contact with a tree or log. 15.
OPERATOR SAFETY VIBRATION AND COLD EYE AND HEARING PROTECTION • It is believed that a condition called Raynaud’s Phenomenon, which affects the fingers of certain individuals, may be brought about by exposure to vibration and cold. Exposure to vibration and cold may cause tingling and burning followed by loss of color and numbness in the fingers. The following precautions are strongly recommended because the minimum exposure which might trigger the ailment is unknown.
SPARK ARRESTOR MUFFLER • The spark arrestor muffler controls the exhaust noise and prevents hot, glowing particles of carbon from leaving the muffler. Make sure the spark arrestor screen is in good repair and properly seated in the muffler. • Certain internal combustion engines operated on forest, brush, and/or grass-covered areas in the states of Washington, Oregon, Idaho, California, Minnesota, New Jersey and Maine, are required to be equipped with a spark arrestor.
PREPARATION FOR USE WARNING Saw chain is sharp! Always wear gloves when handling assembly, otherwise serious personal injury may result. KICK GUARDTM TO BAR INSTRUCTIONS Bolt (A) Dimple (D) Tools Needed: Two 11 mm (7/16 in.) Wrenches. For saws with Kick GuardTM P/N 2893201 and Symmetrical Low-Kick type (Double Guard) guide bars. Kick GuardTM 1. Install bolt (A) in rear hole (B) of Kick GuardTM and through front hole (C) in guide bar. Rear hole (B) 2.
ADJUSTING CHAIN TENSION IMPORTANT Unlock chain brake Always loosen clutch cover nuts before turning the chain tension adjuster, otherwise the clutch cover and tensioner will be damaged. 1. Remove spark plug lead. (See page 26) 2. Unlock the chain brake and loosen two clutch cover nuts, if necessary. 3. Hold the bar nose up, and turn the tension adjuster clockwise until chain fits snugly against underside of the bar. Proper tension Improper tension Direction to tension the chain Tension adjuster 4.
FUEL AND LUBRICANT FUEL STATEMENT Gasoline - Use 89 Octane [R+M/2] (mid grade or higher) gasoline known to be good quality. Gasoline may contain up to 10% Ethanol (grain alcohol) or 15% MTBE (methyl tertiary-butyl ether). Gasoline containing methanol (wood alcohol) is NOT approved. Use of ECHO branded fuel is recommended to extend engine life in all air-cooled 2-stroke and 2/4-stroke hybrid engines.
HANDLING FUEL Mixing Instructions 1. Fill an approved fuel container with half of the required amount of gasoline. DANGER Fuel is very flammable. Use extreme care when mixing, storing or handling or serious personal injury may result. • Use an approved fuel container. • Do not smoke near fuel. • Do not allow flames or sparks near fuel. • Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly allowing pressure to equalize.
EMISSION DATA EMISSION CONTROL PRODUCT EMISSION DURABILITY (EMISSION COMPLIANCE PERIOD) The 300 hours emission compliance period is the time span selected by the manufacturer certifying the engine emissions output meets applicable emissions regulations, provided that approved maintenance procedures are followed as listed in the Maintenance Section of this manual. (EXHAUST and EVAPORATIVE) EPA 2010 and/ or C.A.R.B.
OPERATION WARNING Chain brake • After choke control knob is pulled and then knob is returned to original position, throttle remains a little open (latch condition). • If engine is started in this latch condition, chain starts to turn. Do not start engine before chain brake is activated.
WHEN THE ENGINE IS COLD Chain brake CAUTION Make sure the bar and chain are free from any obstruction when starting the chain saw. • Move chain brake lever fully forward to lock chain brake before starting. • Fill the fuel tank with fuel mixture. It is not permitted to fill fuel above the shoulder level of fuel tank. Choke Throttle trigger lockout Ignition switch • Fill the chain oil tank with lubricant. Do not over fill. Throttle trigger • Move ignition switch to “ I ” position.
RUNNING Unlock chain brake • When engine starts, keep idling for a few minutes. • Set the brake lever in the unlocked position before starting to cut. • Pull throttle trigger gradually and increase revolution of the engine. • The chain starts running when the engine reaches 3900 r/min approximately. • Confirm proper acceleration and lubrication of chain and bar. • Do not run the engine at high speed unnecessarily. • Be sure that saw chain stops moving when throttle trigger is released.
CUTTING INSTRUCTION GENERAL CAUTION • Read the ECHO “CHAIN SAW SAFETY MANUAL” for additional cutting and safety instructions. • Wear suitable hearing protection such as earmuffs or earplugs to protect against objectionable or uncomfortable loud noises. • Do not let the tip of the bar touch anything while the engine is running. At cutting speed the chain is moving at a high rate of speed. Should the tip contact a limb or log while the chain is moving, the tip will be pushed upward with considerable force.
FELLING THE TREE A falling tree can seriously damage anything it may hit - a car, a house, a fence, a power-line, or another tree. There are ways to make a tree fall where you want it, so first decide where that is! Before cutting, clear the area around the tree. You will need good footing while working and you should be able to work the saw without hitting any obstacles. Next, select a path of retreat.
LIMBING Limbing a fallen tree is much the same as bucking. Never stand on the tree that you are limbing. When limbing, caution is the word. Be careful of the tip touching other limbs. Always use both hands. Don’t cut with the saw overhead or aligned vertically with your body. If the saw should kickback, you may not have enough control to prevent possible injury. BUCKING Bucking is the sawing of a log or fallen tree into smaller pieces. There are a few basic rules which apply to all bucking operations.
CHAIN BRAKE OPERATION Kickback motion • Set the lever in the unlocked position before starting to cut. • If the brake is tripped by kickback reaction, the chain will stop immediately. Release the throttle to avoid possible damage to the engine or clutch. • Do not attempt to operate the engine with the brake locked. Improper thrust cutting Kickback motion When the bar nose hits another tree, etc.
AUTOMATIC CHAIN BRAKE End of the guide bar may be placed at the height of about 35 cm. Kickback produced from the tip of the guide bar will trip the automatic chain brake. To make sure that the automatic chain brake operates properly, follow these steps: 1. Stop the engine. 2. Hold the saw with the guide bar approximately 35 cm above a wooden surface. Right hand should hold the rear handle, and left hand should hold the front handle. 3.
CHAIN AND GUIDE BAR COMBINATION The following combinations are recommended for model CS-490. Guide bar Length mm (in.) ECHO Part No. 406 (16) 16F0AD3366 457 (18) 18F0AD3372 508 (20) 20F0AD3378 Saw chain Pitch mm (in.) 8.26 (0.325) ECHO Part No. Links 20BPX66CQ 66 20BPX72CQ 72 20BPX78CQ 78 GUIDE BAR (Low-kickback) Replacement guide bars. The following guide bars may be considered to have equivalent kickback energy.
MAINTENANCE AND CARE SKILL LEVELS Your ECHO chain saw is designed to provide many hours of trouble free service. Regular scheduled maintenance will help your chain saw achieve that goal. If you are unsure or are not equipped with the necessary tools, you may want to take your unit to an ECHO Service Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have the ECHO Dealer do it, each maintenance task has been graded. If the task is not listed ask your ECHO dealer for repairs.
CARBURETOR ADJUSTMENT Idle adjusting screw Every unit is run at the factory and the carburetor is set in compliance with Emission Regulations. In addition, the carburetor is equipped with high speed and low speed needle adjustment limiters that prevent settings outside acceptable limits. 1. Before adjusting carburetor clean or replace air filter and muffler “Spark Arrestor Screen”. 2. Make sure the bar and chain are properly adjusted. 3.
AIR FILTER Spark plug Air filter • Check before every use. • Close choke ( ). • Turn cleaner cover knob counterclockwise by hand and remove air cleaner cover and air filter. • Brush off dust lightly, or clean with compressed air, or replace the air filter. • Reinstall air filter and cover. Cleaner cover knob Air cleaner cover Choke control knob CHECK FUEL SYSTEM • Check before every use. • After refueling, make sure fuel does not leak from around fuel pipe, fuel grommet or fuel tank cap.
GUIDE BAR • Clean before using. - Clean the groove of the guide bar with a small screwdriver. - 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 bar. Replace either or both if worn. Groove Oil hole (Clutch) Sprocket SPROCKET Worn : 0.5 mm • A damaged sprocket will cause premature damage or wear of saw chain. - When the sprocket has worn out 0.5 mm or more, replace it.
SETTING THE SAW CHAIN Preset tie strap Left hand cutter Drive link Top plate Side plate Guard link Depth gauge Tie strap Right hand cutter Important points for proper maintenance of saw chain: • Keep the cutters sharp at all times. • Keep the left and the right cutters properly aligned. - Note that blunt or irregular cutters will result in poor cutting performance, increased vibration of chains and premature breakage of the saw chain.
1/5 One fifth of file diameter remains above cutter edge • Place the depth gauge tool firmly on guide bar so that depth gauge protrudes. Then file top of depth gauge with the flat file until flat with top of the depth gauge tool. Depth gauge tool Remove until flat with tool - Be sure to round off the front edge of the depth gauge. Round off the edge Properly filed cutters are shown in illustration. 55° When setting of the chain is finished, soak it in oil and wash away filings completely before using.
TROUBLESHOOTING Problem Engine Cause — hard to start Remedy — does not start Engine cranks Fuel at carburetor Fuel at cylinder No fuel at carburetor • Fuel filter clogged • Clean or replace • Fuel line clogged • Clean • Carburetor • Ask your ECHO dealer No fuel at cylinder • Carburetor • Ask your ECHO dealer Muffler wet with fuel • Fuel mixture is too rich • Open choke • Clean / replace air filter • Adjust carburetor • Ask your ECHO dealer Spark at end of plug wire No spark at end of pl
STORAGE AFTER USE • Inspect and adjust every part of the chain saw. - Completely clean every part and repair if necessary. - Apply thin coating of oil on metal parts to prevent rust. • Remove chain and guide bar. • Drain fuel tank, pull starter slowly a few times to drain fuel from carburetor. • Pour a small amount of clean motor oil into spark plug hole, pull starter and crank the engine until piston reaches: TOP DEAD CENTER. • Store in a dry area, free from dust.
TECHNICAL DATA Dimension Mass Engine Fuel MODEL L×W×H Power head, dry Type Displacement Carburetor Magneto Spark plug Starter Power transmission Mixture ratio mm kg mL (cm³) Gasoline Oil Guide bar and saw chain Engine speed Tank capacity Bar and chain Tank capacity Lubrication Idle Clutch engagement Wide open throttle L L r/min Standard features CS-490 395 × 250 × 290 4.8 Without chain and guide bar Air-cooled two-stroke single cylinder 50.
WARRANTY REGISTRATION SHEET Thank you for choosing ECHO Power Equipment Please go to http://www.echo-usa.com/Warranty/Register-Your-ECHO to register your new product on-line. It’s FAST and EASY! NOTE: your information will never be sold or misused by ECHO, Inc. Registering your purchase enables us to contact you in the unlikely event of a service update or product recall, and verifies your ownership for warranty consideration.
C6831515001001 - C68315999999 1/lECHll
