Chain Saw Instruction Manual MODEL : CS-305 WARNING DANGER Read rules for safe operation and instructions carefully. ECHO provides an Instruction Manual and a Safety Manual. Both must be read and understood for proper and safe operation.
RULES FOR SAFE OPERATION A. Kickback Safety Precaution for Chain Saw Users WARNING! 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. 1. With a basic understanding of kickback, you can reduce or eliminate the element of surprise. Sudden surprise contributes to accidents. 2.
7. Keep all parts of your body away from the saw chain when the engine is running. 14. Keep the handles dry, clean, and free of oil or fuel mixture. 8. Before you start the engine, make sure that the saw chain is not contacting anything. 15. Operate the chain saw only in well-ventilated areas. 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. 16.
TECHNICAL DATA Model Dimension Weight CS-305 LxWxH Power head, dry mm 380 x 235 x 220 inch 10.2 x 9.2 x 8.7 kg 3.4 (7.5 lb) Without chain and guide bar Engine Type Displacement Air-cooled, two-stroke, single cylinder ml 30.1 (1.83 cu.in.) Carburetor Diaphragm type Magneto Spark Plug Starter Power transmission Fuel Mixture ratio Tank Capacity Oil Flywheel magneto : CDI system NGK BPMR-8Y Recoil starter Automatic centrifugal clutch 50:1 ratio with ECHO brand two-stroke oil.
EMISSION DATA EMISSION CONTROL EPA Phase 2 The emission control system for these engines are EM (Engine Modification). IMPORTANT ENGINE INFORMATION ENGINE FAMILY: 4EXHS.0334RA DISPLACEMENT: 30.1 CC EMISSION COMPLIANCE PERIOD : 300 HRS. THIS ENGINE MEETS U.S. EPA PAHSE 2 EMISSION REGULATIONS FOR SMALL NONROAD ENGINE. REFER TO OWNER'S MANUAL FOR MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS. An Emission Control Label is located on the engine.
PART LOCATION AND DESCRIPTION CS-305 1 2 13 3 10 9 4 6 11 5 7 8 20 12 21 18 13 14 15 19 21 17 16 1. Front handle 2. Hand guard (Chain brake actuating lever) 3. Saw chain 4. Guide bar 5. Chain catcher 6. Sprocket guard 7. 8. 9. 10. 11. 12. 13. Muffler Rear hand guard Throttle control lockout Throttle control trigger Air cleaner cover Chain tension adjustment screw Pull starter 6 14. 15. 16. 17. 18. 19. 20. 21.
PREPARATION FOR USE KICK GUARD® TO BAR INSTRUCTIONS For saws with Kick Guard® P/N 2894901 and symmetrical or asymmetrical low-kick type guide bars. 1. Install bolt (A) in rear hole (B) of Kick Guard® and through front hole (C) in guide bar. 2. IMPORTANT: Dimple in Kick Guard® (D) must engage recess in guide bar (E). 3. Tighten nut (F) and bolt (A) until snug. Make certain Kick Guard® is flush against guide bar.
ADJUSTMENT, CHAIN TENSION • Remove spark plug lead. • Loosen two guide bar nuts (I), if necessary. • • L Hold the bar nose up, and turn the adjuster screw (L) clockwise until the chain touches the bottom of the bar. Tighten both guide bar nuts with bar nose held up. IMPORTANT! Tighten guide bar nuts to 90 – 110 kgf/cm (80 – 95 in. lbs.) DO NOT over-tighten nuts. Damage to saw may result. • • Pull the saw chain around the guide bar by hand. Reduce chain tension, if you feel tight spots.
Mixing Instructions 1. Fill an approved fuel container with half of the required amount of gasoline. 2. Add the proper amount of 2-stroke oil to gasoline. 3. Close container and shake to mix oil with gasoline. 4. Add remaining gasoline and remix. 5. Install fuel container cap and wipe any spilled fuel from container and surrounding area. IMPORTANT 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. Fuel Mix Chart 50:1 (U.S.
OPERATION WHEN THE ENGINE IS COLD WARNING DANGER Make sure bar and chain are not touching anything when starting the saw. • • • • • • • • • Move chain brake lever fully forward to engage chain brake before starting. Fill the fuel tank with fuel. Fill the chain oil tank with lubricant. Turn switch (A) to “RUN” position (I). Pull choke (B) all the way out (closed position). Push purge bulb (C) 10 times. Pull starter handle several times until first firing sound is heard.
STARTING WARM ENGINE • • • • 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.) Turn switch (A) to “RUN” position (I). Pull starter handle. Choke may be used if necessary, but be sure to push it back on first firing sound. NOTE If engine does not start after 5 pulls, use cold start procedure. A RUNNING WARNING DANGER The saw chain should not move at idle, otherwise serious personal injury may result.
CUTTING INSTRUCTIONS GENERAL WARNING DANGER Read the ECHO “CHAIN SAW SAFETY MANUAL” included with your chain saw for additional cutting and safety instructions. Failure to obey all instructions may result in serious or fatal injuries. In all circumstances the operation of the chain saw is a oneman job. It is difficult at times to take care for your own safety, so don’t assume the responsibility for a helper as well.
FELLING A TREE WARNING DIRECTION OF FALL DANGER A falling tree can cause serious injury or 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.
Don’t cut with the saw overhead or the bar in a vertical position. If the saw should kick back you may not have good enough control to prevent possible injury. 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. BUCKING Keep both hands on the handles at all times. Support logs if possible. Uphill position When cutting on a slope or hillside, always stand uphill.
INFORMATION Kickback Safety Features The following features are standard for this model as Kickback Safety Features. • Double Guard Low Kick Type Guide Bar or Asymmetrical Low Kick Type Guide Bar Note: Your saw chain can be used with either of these bars. Double Guard Bar Reduced nose radius NOTE Use ECHOTM replacement guide bars.
MAINTENANCE AND CARE AIR FILTER • • • • A Check before every use. Pull choke (A) all the way out (close position). Loosen bolt and remove air cleaner cover (B) and filter (C). Lightly brush dust off filter, and inspect for damage. C B AUTOMATIC OILER • • • D The discharge volume of the automatic oiler is adjusted to 3 to 4 cc/mm (@ 7000 rpm) prior to shipment from the factory. Always check oil discharge when in use.
SPROCKET I • • • A damaged sprocket (J) will cause premature damage or wear of saw chain. - When the sprocket has worn out 0.5mm (.020”) or more, replace it. Check sprocket when you install new chain. Replace it if worn. Clean sprocket, clutch, and bar mount area before installation of bar. IMPORTANT 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. J SPARK PLUG • • • • Check periodically Gap = 0.65mm (.
1. Start engine and run for several minutes to reach operating temperature. CARBURETOR ADJUSTMENT Engine Break-In New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can be adjusted as required. BEFORE MAKING ADJUSTMENTS: • The correct spark plug must be clean and properly gapped.
CHAIN AND GUIDE BAR COMBINATION The following combinations may be used on CS-305. MODEL BAR LENGTH 12" CS-305 14" DOUBLE GUARD BAR ECHO P/N (OEM P/N) EC H O PART NO. LINKS 124374501/ (12A4CD3745) 1907045 45 144375201/ (14A4CD3752) KICK GUARD SAW CHAIN 1907052 TYPE PITCH GAUGE ECHO P/N (OEM P/N) 90S G 3/8" .
• Place the depth gauge tool firmly on guide bar so that depth gauge protrudes. Then file top of depth gauge with flat file until flat with top of the gauge tool. - Be sure to round off the front edge of the depth gauge. Depth gauge tool Round off the edge Remove until flat with tool • Properly filed cutters are shown below. (Top plate angle) (Side plate angle) (Top plate cutting angle) 50° 80° (Depth gauge) 0.64 mm (0.025 in.
TROUBLESHOOTING Poor performance of the engine and/or cutting mechanism can normally be prevented by carefully following these instructions. Poor performance can easily be corrected even by a beginner. When the engine does not function properly check the following three (3) points first.
Table 2 Improper fuel used ........................................ Use fuel with correct mixing ratio. Never use gasoline of poor quality. Spark plug defective (worn) ........................... Replace. Engine overheated As cooling fins clogged, air does not pass well ........................................ Clean fins. Ouput (engine speed) insufficient Excessive deposits in combustion chamber ..................................... Disassemble and remove carbon.
CORRECT USE OF CHAIN BRAKE The installation of a chain brake may be mandatory by law or as stipulated by insurance regulations in your area of operation. You should inquire through local government offices, your employer or your local dealer to ensure that your chain saw conforms to the required safety standard. Echo chain brakes have been designed and tested to comply with international safety standards as follows. USA: ANSI Standard B175.
SERVICING INFORMATION PARTS Genuine ECHO Parts and ECHO REPOWERTM 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. __________ SERVICE DEALER? Call 1-800-432-ECHO or www.echo-usa.