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Specifications, descriptions and illustrative material in this literature are as accurate as known at the time 
of publication, but are subject to change without notice. Illustrations may include optional equipment and 
accessories, and may not include all standard equipment.

Instruction Manual

X7503270007

© 08/2013 ECHO Inc.

x7722271404 / x772000164

CS-310

CHAIN SAW

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.

Users of this equipment risk injury to themselves and others if the unit is used 
improperly and/or safety precautions are not followed. ECHO provides an operator’s 
manual and a safety manual. Both must be read and understood for proper and safe 
operation. Failure to do so could result in serious injury.

Summary of Contents for CS-310

Page 1: ...c 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 chemica...

Page 2: ...ning 22 Stopping 23 Checking Chain Tension 23 Chain Lubrication Test 23 Cutting Instructions 23 Chain And Guide Bar Combination 27 Guide Bar 27 Saw Chain 27 Maintenance 28 Skill Levels 28 Maintenance...

Page 3: ...diately 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 wit...

Page 4: ...our saw As a chain saw user you should take several steps to keep your cutting jobs free from accident or injury 1 With a basic understanding of kickback you can reduce or eliminate the element of sur...

Page 5: ...e push the lever forward to lock the brake Confirm that the brake works properly before each use If the chain brake is clogged with wood chips function of the brake may deteriorate Always keep the dev...

Page 6: ...ection 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 sta...

Page 7: ...r suspend the saw on a lanyard with the engine running Always use the saw from the right hand side of your body NEVER from the left side Always wear proper safety clothing to protect your lower body f...

Page 8: ...on the handles Gloves also reduce the transmission of machine vibration to your hands Breathing Protection Wear a facemask to protect against dust Hearing Protection ECHO recommends wearing hearing pr...

Page 9: ...If you experience discomfort redness and swelling of the fingers followed by whitening and loss of feeling consult your physician before further exposing yourself to cold and vibration Repetitive Str...

Page 10: ...city 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 ind...

Page 11: ...position choke closed Wear eyes ears and head protection Oil and gasoline mixture Tip contact may cause the guide bar to move suddenly upward and backward which may cause serious injury Chain oil fil...

Page 12: ...age provides tips for use care and maintenance of the unit CIRCLE AND SLASH SYMBOL This symbol means the specific action shown is prohibited Ignoring these prohibitions can result in serious or fatal...

Page 13: ...t 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 fo...

Page 14: ...old 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 T...

Page 15: ...ard guide bars 1 Install bolt A in rear hole B of tip guard and through front hole C in guide bar 2 IMPORTANT Dimple D in tip guard must engage recess E in guide bar 3 Securely tighten nut F and bolt...

Page 16: ...nuts finger tight Improper sprocket guard assembly can result in serious injury and will cause severe saw damage if unit is started Never start or operate saw if brake band is not in place on clutch d...

Page 17: ...nd Loosen the adjustment if you feel tight spots Tighten guide bar nuts to 4 5 7 5 N m 40 65 in lbf DO NOT over tighten nuts Damage to saw may result 6 Keep chain properly tensioned at all times Note...

Page 18: ...SO CD 13738 and J A S O FD Standards must be used Echo brand premium Power Blend X Universal 2 Stroke Oil meets these standards Engine problems due to inadequate lubrication caused by failure to use a...

Page 19: ...a well ventilated unoccupied building away from sparks and flames Stored fuel ages Do not mix more fuel than you expect to use in thirty 30 days ninety 90 days when a fuel stabilizer is added Stored...

Page 20: ...t is equipped with a spark arrestor to prevent discharge of hot particles from the engine Metal cutters can also create sparks if the cutter strikes rocks metal or other hard objects Contact local fir...

Page 21: ...d Do not start engine before chain brake is locked 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 9 Pull starte...

Page 22: ...Do not increase engine speed while chain brake is locked Severe brake damage will result Running The saw chain should not move at idle otherwise serious personal injury may result Note If saw chain m...

Page 23: ...during work and corrected as necessary Do not operate with a loose chain Chain Lubrication Test Hold the chain just above a dry surface and open the throttle to half speed for 30 seconds A thin line o...

Page 24: ...igger to open the throttle wide open and start the cut If the chain is properly sharpened the cutting should be relatively effortless It is not necessary to press down hard to make the saw cut Pushing...

Page 25: ...er exceeding twice the bar length start the notching cuts from one side and draw the saw through to the other side of the notch Start the back cut on one side of the tree pivoting the saw through to f...

Page 26: ...end and pinch the saw if improperly supported The trunk will weaken at the point where you make the cut unless the tree is lying on perfectly flat ground or supported as shown If you make the cut with...

Page 27: ...r Chain Saw Safety Manual for tip guard application information Guide Bar Low kickback Replacement guide bars The following guide bars may be considered to have equivalent kickback energy Sprocket nos...

Page 28: ...ed ECHO offers REPOWERTM Maintenance Kits and Parts to make your maintenance job easier Maintenance Intervals MAINTENANCE PROCEDURE LETTER CODES I INSPECT R REPLACE C CLEAN IMPORTANT NOTE Time interva...

Page 29: ...place 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...

Page 30: ...ere is a danger of fire Stop using the machine immediately and request your dealer to inspect or replace Fuel Filter Check periodically Do not allow dust to enter fuel tank A clogged filter A will cau...

Page 31: ...gasoline to clean it Guide Bar 1 Clean before using 2 Clean the groove A of the guide bar with a small screwdriver 3 Clean oil holes B with a wire 4 Invert guide bar periodically 5 Clean the bar moun...

Page 32: ...required to be equipped with a spark arrestor This requirement also applies to all U S Forest Service lands In some of these areas the spark arrestor system must be certified per USDA Forest Service...

Page 33: ...piston when cleaning the exhaust port Do not allow carbon particles to enter the cylinder 5 Install muffler Tighten muffler mounting bolts or nuts to 7 9 N m 60 80 in lbf 6 Install cylinder cover and...

Page 34: ...of the saw chain Drive link serves to remove sawdust from the groove of the guide bar Keep the lower edge of the drive link sharp where indicated Setting Saw Chain For setting saw chain round file 4...

Page 35: ...hain is finished soak it in oil and wash away filings completely before using When chain has been filed on the bar supply sufficient oil to it move the chain slowly to wash away the filings before usi...

Page 36: ...at end of plug wire No spark Stop switch off Electrical problem Interlock switch Turn switch to ON See your Echo dealer See your Echo dealer Spark at plug No spark Spark gap incorrect Covered with ca...

Page 37: ...it stops due to lack of fuel Allow engine to cool then remove the spark plug and pour 7 cc 1 4 oz of fresh clean two stroke engine oil into the cylinder through the spark plug hole Store in a dry are...

Page 38: ...two stroke air cooled engine oil Gasoline Use 89 octane unleaded Do not use fuel containing methyl alcohol more than 10 ethyl alcohol or 15 MTBE Do not use alternative fuels such as E 15 or E 85 Oilin...

Page 39: ...warranty period and arrange for pick up or return of your unit after the repairs have been made For your nearest authorized ECHO servicing dealer call ECHO s Dealer Referral Center at 1 800 432 ECHO o...

Page 40: ...or California Emission Defect Warranty Explanation X G Only use gasoline which contains G Gasohol which contains a 6 7 J 9 is also approved The prescribed mixing ratio of gasoline to oil is listed on...

Page 41: ...CS 310 NOTES 08 2013 ECHO Inc X7503270007 41 NOTES...

Page 42: ...42 X7503270007 08 2013 ECHO Inc NOTES CS 310...

Page 43: ...equire assistance or have questions concerning the application operation or maintenance of this product you may call the ECHO Consumer Product Support Department at 1 800 673 1558 from 8 30 am to 4 30...

Page 44: ...ECHO INCORPORATED 400 Oakwood Road Lake Zurich IL 60047 www echo usa com 44 C04511001001 C04511999999 C04612001001 C04612999999...

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