x7722271404 / x772000164 CS-303T CHAIN SAW Instruction Manual Burn Hazard The muffler or catalytic muffler and surrounding cover may become extremely hot. Always keep clear of exhaust and muffler area, otherwise serious personal injury may occur. The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
TABLE OF CONTENTS CS-303T TABLE OF CONTENTS Table of Contents .................................................................................................................................................................. 2 Packing List ........................................................................................................................................................................... 3 Safety..........................................................................................
CS-303T PACKING LIST PACKING LIST The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging restrictions, guide bar and saw chain installation and other assembly may be necessary. After opening the carton, check for damage. Immediately notify your retailer or ECHO dealer of damaged or missing parts. Use the packing list to check for missing parts. *Some Echo units may be factory pre-assembled. Assembly tools are not supplied with these units.
SAFETY CS-303T SAFETY Rules For Safe Operation Kickback Safety Precautions for Chain Saw Users For more information scan this QR code. KICKBACK may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut. Tip contact in some cases may cause a lightning fast reverse REACTION, Kicking the guide bar up and back towards the operator.
CS-303T SAFETY Correct Use Of Chain Brake CHAIN BRAKE OPERATION Locked • 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. TESTING THE BRAKE • Start the engine on a solid level surface and run at a fast idle until warm.
SAFETY CS-303T AUTOMATIC CHAIN BRAKE 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 55 cm (22 in.) above a wooden surface. Right hand should hold the rear handle, and left hand should hold the front handle. 55 cm (22 in.) 3. Release the front handle and drop the end of the guide bar against the wooden surface. 4.
CS-303T SAFETY 14. Keep the handles dry, clean, and free of oil or fuel mixture. 15. Operate the chain saw only in well ventilated areas. 16. Do not operate a chain saw in a tree unless you have been specifically trained to do so. 17. All chain saw service, other than items listed in the Instruction manual maintenance instructions, should be performed by competent service personnel.
SAFETY CS-303T Personal Condition and Safety Equipment Users of this product risk injury to themselves and others if the unit is used improperly and/or safety precautions are not followed. Proper clothing and safety gear must be worn when operating unit. Physical Condition Your judgment and physical dexterity may not be good: • if you are tired or sick, • if you are taking medication, • if you have taken alcohol or drugs. Operate unit only if you are physically and mentally well.
CS-303T SAFETY The ignition components of this machine generate an electromagnetic field during operation which may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemakers should consult with their physician and the pacemaker manufacturer before operating this machine. In the absence of such information, ECHO does not recommend the use of ECHO products by anyone who has a pacemaker.
SAFETY CS-303T All over head electrical conductors and communications wires can have electricity flow with high voltages. This unit is not insulated against electrical current. Never touch wires directly or indirectly, otherwise serious injury or death may result. Do not operate this product indoors or in inadequately ventilated areas. Engine exhaust contains poisonous emissions and can cause serious injury or death. 10 X7503207802 © 08/2013 ECHO Inc.
CS-303T SAFETY Symbols and Signs Symbol form/shape X7503207802 © 08/2013 ECHO Inc. Symbol description/application Symbol form/shape Symbol description/application WARNING!! Read and follow all safety precaution in the instruction manual. Failure to follow instructions could result in serious personal injury.
EMISSION CONTROL (EXHAUST / EVAPORATIVE) CS-303T Manual Safety Symbols and Important Information Throughout this manual and on the product itself, you will find safety alerts and helpful, informational messages preceded by symbols or key words. The following is an explanation of those symbols and key words and what they mean to you. 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.
CS-303T DESCRIPTION DESCRIPTION Locate the safety decal(s) on your unit. Make sure the decal(s) 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. See PARTS ORDERING instructions for specific information. 12 13 1 3 2 4 11 5 6 14 7 10 9 15 8 16 22 21 20 United States X7503207802 © 08/2013 ECHO Inc.
DESCRIPTION CS-303T 1. Chain Brake Lever/Front hand guard - Guard between the front handle and the saw chain for protecting the hand from injuries and aiding in control of the chain saw if the hand slips off the handle. 2. Air cleaner cover - Covers air cleaner. 3. Guide bar - The part that supports and guides the saw chain. 4. Tip guard - Anti-kickback device attached to the bar nose. 5. Saw chain - Chain, serving as a cutting tool. 6. Chain tension adjuster - Device to adjust chain tension. 7.
CS-303T DESCRIPTION Preparation For Use Saw chain is sharp! Always wear gloves when handling assembly, otherwise serious personal injury may result. Note: The machine may be delivered with guide bar, tip guard, and saw chain separated. Install guide bar, tip guard, and saw chain as follows. For more information scan this QR code. Tip Guard to Bar Instructions A D Tools Needed: Two 11 mm (7/16 in.) Wrenches.
DESCRIPTION 5. Unlock the chain brake, and mount guide bar on studs (C) and slide toward sprocket (E) to make saw chain installation easier. Install chain with cutters on top of guide bar facing forward. CS-303T C E F D A B 6. Install the sprocket guard over the guide bar studs. Ensure chain tension adjuster pin (F) fits into the guide bar adjuster hole (D). Tighten sprocket guard nuts finger tight. 7. Adjust saw chain tension, as instructed in “Adjustment, Chain Tension”.
CS-303T OPERATION Note: All chains require frequent adjustments. OPERATION Fuel Alternative fuels, such as E-15 (15% ethanol), E-85 (85% ethanol) or any fuels not meeting ECHO requirements are NOT approved for use in ECHO 2-stroke gasoline engines. Use of alternative fuels may cause performance problems, loss of power, overheating, fuel vapor lock, and unintended machine operation, including, but not limited to, improper clutch engagement.
OPERATION CS-303T • DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks outdoors over bare ground. • DO NOT overfill fuel tank. Wipe up spills immediately. • Securely tighten fuel tank cap and close fuel container after refueling. • Inspect for fuel leakage. If fuel leakage is found, do not start or operate unit until leakage is repaired. • Move at least 3m (10 ft.) from refueling location before starting the engine. Mixing Instructions 1.
CS-303T OPERATION Proper lubrication of the chain while in operation reduces friction between the chain and the guide bar to a minimum and assures a longer service life. • Use bar and chain oil of high quality for this purpose. • Do not use used or reclaimed oil to avoid various oiler problems. • Use ECHO bar and chain oil. • When ECHO bar and chain oil is not available: Use motor oil, etc. Oil tank cap Fuel tank cap • Use bar and chain oil of the following grades: • SAE No. 30....in summer • SAE No.
OPERATION CS-303T 5. Turn switch (A) to “RUN” position (I). 6. Pull choke (B) all the way out (close choke) position. 7. Push purge bulb (C) 10 times. 8. Pull starter handle several times until first starting sound is heard. (Secure unit on ground with your knee or foot) (5-6 pulls maximum). C 9. Push choke (B) all the way in (open choke) position. B 10. Pull starter handle again. Note: If engine does not start after 5 pulls, repeat instructions.
CS-303T OPERATION Starting Warm Engine Make sure the bar and chain are free from any obstruction when starting the chain saw. 1. Ensure that there is fuel and chain oil in the tanks. (If fuel tank was emptied during previous operation, refill tank and push purge bulb 10 times.) 2. Move chain brake lever fully forward to lock chain brake before starting. A 3. Lay unit on a flat, clear area and keep bar and chain clear of all obstacles. 4. Turn switch (A) to “RUN” position (I). 5. Pull starter handle. 6.
OPERATION CS-303T Stopping 1. Release throttle trigger and turn switch (A) to STOP (O) position. 2. Move chain brake lever fully forward to lock chain brake Note: If engine does not stop, pull choke control knob out fully to stop engine. Return the unit to your authorized ECHO dealer to check and repair stop switch before starting the engine again. A Checking Chain Tension Chain tension should be checked frequently during work and corrected as necessary. Do not operate with a loose chain.
CS-303T OPERATION • 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. This is known as kickback. Avoid it! In all circumstances the operation of the chain saw is a one-man job. It is difficult at times to take care for your own safety, so don’t assume the responsibility for a helper as well.
OPERATION CS-303T 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! For more information on scan this QR code. 3 m (10 feet) Direction of fall 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.
CS-303T OPERATION 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. Uphill position • Keep both hands on the handles at all times. • Support logs if possible. • When cutting on a slope or hillside, always stand uphill.
OPERATION CS-303T Chain And Guide Bar Combination The following combinations are recommended for model CS-303T. Low Kickback Guide Bar Low Kickback Saw Chain Length Bar P/N Chain P/N Links 12” 12A0CD3745 91PX45CQ 91VG45CQ 45 14A0CD3752 91PX52CQ 91VG52CQ 52 14” Kick Guard Type Pitch Gauge Echo P/N (OEM P/N) 91PX 91VG 3/8” 0.
CS-303T MAINTENANCE MAINTENANCE Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit. Allow unit to cool before performing service. Wear gloves to protect hands from sharp edges and hot surfaces. Your ECHO unit is designed to provide many hours of trouble free service.
MAINTENANCE CS-303T Carburetor Adjustment Every unit is run at the factory and the carburetor is set in compliance with Emission Regulations. In addition, the carburetor is equipped with “H” (High Speed) and “L” (Low Speed) needle adjustment limiters that prevent settings outside acceptable limits. HL Engine Break-In New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be made.
CS-303T MAINTENANCE Air Filter 1. Check periodically. 2. Close choke (Cold start position ). This prevents dirt from entering the carburetor throat when the air filter is removed. Brush accumulated dirt from air cleaner area. 3. Remove air cleaner cover. Brush dirt from inside cover. 4. Remove air filter and lightly brush debris from filter. Replace filter if it is damaged, fuel soaked, very dirty, or the rubber sealing edges are deformed. 5. Install air filter cover. Spark Plug • Check periodically.
MAINTENANCE CS-303T Note: Federal EPA regulations require all model year 2012 and later gasoline powered engines produced for sale in the United States to be equipped with a special low permeation fuel supply hose between the carburetor and fuel tank. When servicing model year 2012 and later equipment, only fuel supply hoses certified by EPA can be used to replace the original equipment supply hose. Fines up to $37,500 may be enforced for using an un-certified replacement part.
CS-303T MAINTENANCE Sprocket • A damaged sprocket will cause premature damage or wear of saw chain. Worn: 0.5 mm (0.020 in.) • When the sprocket has worn out 0.5 mm (0.020 in.) or more, replace it. • Check sprocket when you install new chain. Replace it if worn. Some tree sap and resins are corrosive. Thoroughly wash the guide bar and sprocket areas after each use, then coat metal parts with light oil. Cooling System Cleaning • Check periodically. • Clogged fins will result in poor engine cooling. 1.
MAINTENANCE CS-303T Spark Arrestor Screen Carbon deposits in muffler will cause a drop in engine output and overheating. Spark arrestor screen must be checked periodically. 1. Remove muffler cover. 2. Remove spark arrestor screen cover, gaskets, and screen from muffler body. 3. Clean carbon deposits from muffler components. Note: When cleaning carbon deposit, be careful not to damage the catalytic element inside muffler. 4. Replace screen if it is cracked, plugged, or has holes burned through. 5.
CS-303T MAINTENANCE Setting The Saw Chain Preset tie strap Drive link Left hand cutter Top plate Tie strap Side plate Guard link Depth gauge Right hand cutter For more information scan this QR code. 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.
MAINTENANCE • Place the depth gauge tool firmly on guidebar so that depth gauge protrudes. Then file top of depth gauge with the flat file until flat with top of the depth gauge tool. CS-303T 1/5 • One fifth of the file diameter remains above cutter edge. • Be sure to round off the front edge of the depth gauge. Depth gauge tool • Properly filed cutters are shown in illustration. • When setting of the chain is finished, soak it in oil and wash away filings completely before using.
CS-303T TROUBLESHOOTING TROUBLESHOOTING ENGINE PROBLEM TROUBLESHOOTING CHART Problem Check Remedy Fuel strainer clogged Fuel line clogged Carburetor Clean or replace Clean or replace See your Echo dealer No fuel at cylinder Carburetor See your Echo dealer Muffler wet with fuel Fuel Mixture too rich Open choke Clean/replace air filter Adjust carburetor See your Echo dealer No spark Stop switch off Electrical problem Interlock switch Turn switch to ON See your Echo dealer See your
STORAGE CS-303T STORAGE 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 completely. Press purge bulb 6 - 7 times to remove remaining fuel from carburetor then drain the tank again. Close choke, start and run the engine until it stops due to lack of fuel. • Allow engine to cool then remove the spark plug and pour 7 cc (1/4 oz.
CS-303T TECHNICAL DATA TECHNICAL DATA Model CS-303T Length 260 mm (10.2 in.) Width 235 mm (9.3 in.) Height 220 mm (8.7 in.) Dry weight 3.5 kg (7.7 lb.) Without chain and guide bar Engine Air-cooled two-stroke single cylinder Displacement 30.1 cm3 (1.84 cu. in.) Bore 37.0 mm (1.46 in.) Stroke 28.0 mm (1.10 in.) Compressions ratio 7.58 : 1 Carburetor Diaphragm type Spark plug NGK BPM8Y Fuel tank capacity 250mL (8.5 US. fl. oz.
WARRANTY STATEMENTS CS-303T WARRANTY STATEMENTS ECHO LIMITED WARRANTY STATEMENT FOR PRODUCT SOLD IN USA AND CANADA BEGINNING 01/01/2010 ECHO'S RESPONSIBILITY ECHO Incorporated’s Limited Warranty, provides to the original purchaser that this ECHO product is free from defects in material and workmanship.
CS-303T WARRANTY STATEMENTS PURCHASED REPAIR PARTS, SHORT BLOCKS AND ACCESSORIES GD\ UHVLGHQWLDO RU QRQ LQFRPH SURGXFLQJ ZDUUDQW\ GD\ FRPPHUFLDO LQVWLWXWLRQDO DJULFXOWXUDO LQGXVWULDO LQFRPH SURGXFLQJ RU UHQWDO DSSOLFDWLRQ ZDUUDQW\ ATTENTION TWO-STROKE ENGINE POWER PRODUCT OWNERS This ECHO two-stroke engine power product is a quality-engineered unit which has been manufactured to exact tolerances to provide superior performance.
NOTES CS-303T NOTES 40 X7503207802 © 08/2013 ECHO Inc.
CS-303T X7503207802 © 08/2013 ECHO Inc.
NOTES 42 CS-303T X7503207802 © 08/2013 ECHO Inc.
CS-303T SERVICING INFORMATION SERVICING INFORMATION Parts/Serial Number Genuine ECHO Parts and ECHO REPOWER™ Parts and Assemblies for your ECHO products are available only from an Authorized ECHO Dealer. When you do need to buy parts always have the Model Number and Serial Number of the unit with you. You can find these numbers on the engine housing. For future reference, write them in the space provided below. Model No. _________________ SN.
ECHO, INCORPORATED 44 400 Oakwood Road Lake Zurich, IL 60047 www.echo-usa.
