Use and Care Manual
Table Of Contents
- CS-310 CHAIN SAW
- Table of Contents
- Packing List 4
- Safety 5
- Description 19
- Servicing Information 58
- Packing List
- Safety
- Rules For Safe Operation
- 1. With a basic understanding of kickback, you can reduce or eliminate the element of surprise. Sudden surprise contributes to accidents.
- 2. Keep a good firm grip on the saw with both hands, the right hand on the rear handle, and the left hand on the front handle, when the engine is running. Use a firm grip with thumbs and fingers encircling the chain saw handles. A firm grip will help...
- 3. Make sure that the area in which you are cutting is free from obstructions. Do not let the nose of the guide bar contact a log, branch, or any other obstruction which could be hit while you are operating the saw.
- 4. Cut at high engine speeds.
- 5. Do not overreach or cut above shoulder height.
- 6. Follow manufacturer’s sharpening and maintenance instructions for the saw chain.
- 7. Only use replacement bars and chains specified by the manufacturer or the equivalent.
- Correct Use Of Chain Brake
- Chain Brake Operation
- Testing The Brake
- Automatic Chain Brake
- 1. Stop the engine.
- 2. Hold the saw with the guide bar approximately 35 cm (14 in.) above a wooden surface. Right hand should hold the rear handle, and left hand should hold the front handle.
- 3. Release the front handle and drop the end of the guide bar against the wooden surface.
- 4. The impact should lock the chain brake.
- Other Safety Precautions
- 1. Do not operate a chain saw with one hand! Serious injury to the operator, helpers, bystanders, or any combination of these persons may result from one-handed operation. A chain saw is intended for two- handed use.
- 2. Do not operate a chain saw when you are fatigued.
- 3. Use safety footwear, snug-fitting clothing and protective gloves. Wear eye, hearing, and head protection devices.
- 4. Use caution when handling fuel. Move the chain saw at least 3 m (10 feet) from the fueling point before starting the engine.
- 5. Do not allow other persons to be near the chain saw when starting or cutting with the chain saw. Keep bystanders and animals out of the work area.
- 6. Do not start cutting until you have a clear work area, secure footing, and a planned retreat path from the falling tree.
- 7. Keep all parts of your body away from the saw chain when the engine is running.
- 8. Before you start the engine, make sure that the saw chain is not contacting anything.
- 9. Carry the chain saw with the engine stopped, the guide bar and saw chain to the rear, and the muffler away from your body.
- 10. Do not operate a chain saw that is damaged, improperly adjusted, or not completely and securely assembled. Be sure that the saw chain stops moving when the throttle control trigger is released.
- 11. Shut off the engine before setting the chain saw down.
- 12. Use extreme caution when cutting small size brush and saplings because slender material may catch the saw chain and be whipped toward you or pull you off balance.
- 13. When cutting a limb that is under tension, be alert for spring-back so that you will not be struck when the tension in the wood fibers is released.
- 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. (For example, if improper tools are used to remove the flywheel or if an improper tool is used ...
- 18. When transporting your chain saw, use the appropriate guide bar scabbard.
- 19. A spark arrestor muffler approved to SAE Standard J335 is standard on this chain saw to reduce the possibility of forest fires. Do not operate the chain saw with a loose or defective muffler. Do not remove the spark arrestor screen.
- Personal Condition and Safety Equipment
- International Symbols
- Hot Surface
- Chain Brake Operation
- Measured maximum kickback value, without brake, for approved bar and chain combinations.
- (Exhaust & Evaporative)
- Rules For Safe Operation
- Description
- 1. CHAIN BRAKE LEVER / FRONT HAND GUARD - Locks and unlocks the chain brake to stop or allow saw chain rotation. Guard between the front handle and the saw chain helps protect the hand from injuries if the hand slips off the handle.
- 2. SPARK ARRESTOR MUFFLER OR SPARK ARRESTOR MUFFLER WITH CATALYST - The muffler or catalytic muffler controls exhaust noise and emission. The spark arrestor screen prevents hot, glowing particles of carbon from leaving the muffler. Keep exhaust area ...
- 3. TIP GUARD - Anti-kickback device attached to the bar nose.
- 4. SAW CHAIN - Chain, serving as a cutting tool.
- 5. GUIDE BAR - The part that supports and guides the saw chain.
- 6. CHAIN CATCHER - A projection designed to reduce the risk of the operator’s right hand from being hit by a chain which has broken or derailed from the guide bar during cutting.
- 7. CHAIN TENSION ADJUSTER - Device to adjust chain tension.
- 8. CHAIN BRAKE /SPROCKET GUARD - Protective cover for the chain brake, guide bar, saw chain, clutch, and sprocket when the chain saw is in use.
- 9. REAR HAND GUARD - Extension on the lower part of the rear handle for protecting the hand from the chain if it breaks or derails.
- 10. PURGE PUMP - When starting engine, push purge pump 3 or 4 times.
- 11. CHOKE CONTROL KNOB - Device for enriching the fuel/air mixture in the carburetor to aid cold starting. Also activates fast idle throttle latch.
- 12. CYLINDER COVER - The cooling airflow grill. It covers the cylinder, spark plug and silencer.
- 13. SPARK PLUG - Provides spark to ignite fuel mixture.
- 14. THROTTLE TRIGGER LOCKOUT - A safety lever which must be depressed before the throttle trigger can be activated. Prevents accidental operation of the throttle trigger.
- 15. REAR HANDLE - FOR THE RIGHT HAND - Support handle located towards the rear of the engine housing.
- 16. THROTTLE TRIGGER - Device activated by the operator’s finger, for controlling the engine speed. Also releases fast idle throttle latch when squeezed and released immediately after starting engine.
- 17. IGNITION SWITCH - Device for connecting and disconnecting the ignition system and thus allowing the engine to be started or stopped.
- 18. FUEL TANK CAP - For sealing the fuel tank.
- 19. CYLINDER COVER LATCH - Secures cylinder cover.
- 20. STARTER HANDLE - Pull handle slowly until starter engages then quickly and firmly. When engine starts, return handle slowly. DO NOT let handle snap back or damage to unit will occur.
- 21. FRONT HANDLE - FOR THE LEFT HAND - Support handle located at the front of the engine housing.
- 22. OIL TANK CAP - For sealing the oil tank.
- CHAIN SAW TERMS
- 1. FAST IDLE - Throttle setting that causes engine to operate at a faster speed for easier starting.
- 2. THROTTLE LATCH - Device that sets idle speed to fast idle when choke control is operated.
- 3. CHAIN BRAKE - Stops the saw chain.
- 4. DRIVE SPROCKET - Drives saw chain.
- 5. CLUTCH - Turns drive sprocket when engine rpm is fast enough to provide the power needed for cutting.
- Preparation For Use
- Tip Guard to Bar Instructions
- Guide Bar and Saw Chain Installation/Removal
- 1. Release the cylinder cover latches, and remove the cylinder cover.
- 2. Remove spark plug lead.
- 3. Remove sprocket guard nuts (A) and remove sprocket guard (B).
- 4. Remove guide bar and saw chain if necessary.
- 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.
- 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”.
- Adjusting Chain Tension
- 1. Release the cylinder cover latches, and remove the cylinder cover. Remove spark plug lead.
- 2. Unlock chain brake and loosen sprocket guard nuts.
- 3. Hold the bar nose up, and turn the adjuster screw (A) clockwise until chain contacts underside of the bar.
- 4. Tighten nuts with the bar nose held up.
- 5. Pull the chain around the bar by hand. Loosen the adjustment if you feel tight spots.
- 6. Assemble components in reverse order.
- 7. Keep chain properly tensioned at all times.
- Operation
- Fuel
- Chain Lubricant
- Winter Operation
- Starting Cold Engine
- 1. Move chain brake lever fully FORWARD to LOCK chain brake before starting.
- 2. Fill the fuel tank with fuel mixture. Do not over fill.
- 3. Fill the chain oil tank with lubricant. Do not over fill.
- 4. Move ignition switch (A) UP to “RUN” position.
- 5. Push purge pump (B) 3 to 4 times or until fuel is visible in purge pump.
- 6. Pull choke control knob all the way OUT (CLOSED [] choke position).
- 7. Securely hold the chain saw and pull starter handle several times until first starting sound.
- 8. Push choke control knob all the way IN (OPEN choke position).
- 9. Pull starter handle to start the engine.
- Starting Warm Engine
- 1. Move chain brake lever fully FORWARD to LOCK chain brake before starting.
- 2. Confirm there is fuel and chain oil in the tanks.
- 3. Move ignition switch UP to “RUN” position.
- 4. Securely hold the chain saw as shown and pull starter handle.
- 5. Choke may be used if necessary, but after first starting sound, squeeze throttle trigger to release choke and return engine to idle.
- Running
- 1. After engine starts, allow it to return to idle and warm up before using.
- 2. Move chain brake lever fully REARWARD to UNLOCK chain brake.
- 3. Squeeze throttle trigger (B) gradually and increase engine speed.
- 4. The chain starts running when the engine reaches clutch engagement speed (see technical data page).
- 5. Confirm proper acceleration and lubrication of chain and bar.
- 6. Do not run the engine at high speed unnecessarily.
- 7. Be sure that saw chain stops moving when throttle trigger is released.
- Stopping
- Checking Chain Tension
- Chain Lubrication Test
- Cutting Instructions
- Chain And Guide Bar Combination
- 305 (12)
- 12A0CD3745
- 9.53 (3/8)
- 45
- 356 (14)
- 9.53 (3/8)
- 52
- 406 (16)
- 9.53 (3/8)
- 57
- Maintenance
- Skill Levels
- Maintenance Intervals
- Automatic Oiler
- Inspect/Adjust
- 1
- Oil Filter
- Inspect
- 1
- Oil Filter
- Inspect/Replace *
- 1
- Carburetor Adjustment
- 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. 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 and CCW stop.
- 5. Idle Speed Adjustment:
- 6. Accelerate to full throttle for 2 - 3 seconds to clear any excess fuel in the engine, then return to idle. Accelerate engine to full throttle to check for smooth transition from idle to high speed. If engine hesitates turn “L” needle CCW 1/8 t...
- 7. Check idle speed and reset if necessary as described in item 5. If a tachometer is available idle speed should be set to value listed on technical data page.
- Air Filter
- 1. Check before every use.
- 2. CLOSE choke ().
- 3. Press hand guard FORWARD and LOCK chain brake.
- 4. Release the cylinder cover latches (C) and remove cylinder cover (A) and air filter (B).
- 5. Lightly brush dust off air filter, or clean with compressed air, or replace the air filter.
- 6. Install air filter and cylinder cover, engage latches.
- Spark Plug
- Check Fuel System
- Fuel Filter
- Oil Filter
- Guide Bar
- Sprocket
- Cooling System Cleaning
- Spark Arrestor Muffler
- Spark Arrestor Screen
- Exhaust Port Cleaning
- 1. Remove cylinder cover and remove spark plug lead.
- 2. Place piston at top dead center.
- 3. Remove muffler. Check parts for wear or damage, and replace if necessary.
- 4. Use a wood or plastic scraping tool to clean deposits from cylinder exhaust port.
- 5. Install muffler. Tighten muffler mounting bolts (or nuts) to 7 - 9 N•m (60 - 80 in•lbf).
- 6. Install cylinder cover and attach spark plug lead.
- 7. Start engine, and allow unit to warm up at idle for several minutes.
- 8. Stop engine, and re-tighten mounting bolts (or nuts) to 7 - 9 N•m (60 - 80 in•lbf).
- 9. Install guide bar and chain. Adjust chain tension.
- 10. Start engine and check for exhaust leaks between muffler and cylinder head. Stop engine if leak is found and correct problem before operating chain saw.
- Setting The Saw Chain
- Carburetor Adjustment
- Troubleshooting
- Storage
- Specifications
- Product Registration
- Servicing Information
MAINTENANCE CS-310
42 X7503275300
© 1/2017 ECHO Inc.
When starting, idling adjustment speed should be adjusted to
prevent the saw chain from moving. When you experience
trouble with the carburetor, contact your dealer.
Air Filter
1. Check before every use.
2. CLOSE choke ( ).
3. Press hand guard FORWARD
and LOCK chain brake.
4. Release the cylinder cover
latches (C) and remove cylinder
cover (A) and air filter (B).
5. Lightly brush dust off air filter, or
clean with compressed air, or
replace the air filter.
6. Install air filter and cylinder cover,
engage latches.
Spark Plug
• Check periodically.
• The standard spark gap is 0.65 mm
(0.026 in.).
• Fastening torque: 13-17 N•m (110-
150 in•lbf).
1. Remove cylinder cover and
remove spark plug.
2. Correct the spark gap if it is wider or narrower than the standard gap.
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.
• In case of fuel leakage there is a danger of fire. Stop using the machine
immediately and request your dealer to inspect or replace.
A
C
B
0.65 mm (0.026 in.)