background image

27

CS-4510

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 

Mix) and “L” (Low Mix) 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.  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.  

Gently turn “H” mix needle counterclockwise 

(CCW) to stop.  

Gently turn “L” mix needle midway between full  

clockwise (CW) stop and CCW stop. 

5.  Idle Speed Adjustment: 

•  Start engine, turn “Idle” speed adjustment 

screw CW until the saw chain begins to move, 

then turn screw out CCW until the saw chain 

stops moving.  

Turn screw out, CCW, an additional ½ turn. 

   WARNING

Cutting attachment must not move when unit 

is idling. 

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 turn 

and repeat acceleration.  

Continue adjustment until smooth acceleration 

results. 

7.  Check idle speed and reset if necessary as  

described in item 5.  

If a tachometer is available idle speed should be 

set to 3,100 r/min. 

   CAUTION

When starting, idling adjustment speed 

should be adjusted not to rotate the saw 

chain.  

Correct idle speed is adjusted 3100 r/min.  

Or ½ turn CCW from the point the chain 

stops moving.  

When you experience trouble with the 

carburetor, contact your dealer.

Idle adjusting screw

Low mix needle (L)

High mix needle (H)

High Altitude Operation

This engine has been factory adjusted to maintain 

satisfactory starting, and durability performance 

up to 330 m / 1,100 ft above sea level (ASL) (96.0 

kPa).  

To maintain proper engine operation and above 

330 m / 1,100 ft ASL the carburetor may need to be 

adjusted by an authorized ECHO service dealer. 

IMPORTANT

If the engine is adjusted for operation above 

330 m / 1,100 ft

 ASL, the carburetor must be 

readjusted when operating the engine below 

330 m / 1,100 ft

 ASL, otherwise severe engine 

damage may result. 

Summary of Contents for CS-4510-18

Page 1: ...e instructions carefully and follow the rules for safe operation Failure to do so could result in serious injury X7503350602 ECHO INCORPORATED 400 Oakwood Road Lake Zurich Illinois 60047 1564 Phone 84...

Page 2: ...2 CS 4510 Copyright 2017 All Rights Reserved The engine exhaust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm WARNING...

Page 3: ...for the saw chain 7 Only use replacement bars and chains specified by the manufacturer or the equivalent WARNING KICKBACK may occur when the nose or tip of the guide bar touches an object or when the...

Page 4: ...mb 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 Operat...

Page 5: ...PERATION 3 SYMBOLS AND SIGNS 5 PACKING LIST 7 NOMENCLATURE OF PARTS 8 OPERATOR SAFETY 10 CORRECT USE OF CHAIN BRAKE 11 PREPARATION FOR USE 12 FUEL AND LUBRICANT 14 EMISSION DATA 16 OPERATION 17 CUTTIN...

Page 6: ...uctions could result in serious personal injury Choke control Cold Start position choke closed Wear eyes ears and head protection Oil and gasoline mixture Measured maximum kickback value without trigg...

Page 7: ...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 t...

Page 8: ...8 CS 4510 NOMENCLATURE OF PARTS If a decal cannot be read a new one can be ordered from your ECHO dealer 21 16 17 19 18 5 4 8 7 10 11 12 3 1 9 23 6 24 22 20 15 13 14 2 OPERATORS 25...

Page 9: ...ide bar mounting point acting as a pivot when in contact with a tree or log 11 Guide bar The part that supports and guides the saw chain 12 Saw chain Chain serving as a cutting tool NOMENCLATURE OF PA...

Page 10: ...r twisted position Take periodic breaks to minimize repetition and rest your hands Reduce the speed and force in which you do the repetitive movement Do exercises to strengthen hand and arm muscles Se...

Page 11: ...y 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 The installation of a chain brake may be mandatory by law or as stipulat...

Page 12: ...s into the guide bar adjuster hole brake band is positioned around clutch drum Tighten clutch cover nuts finger tight 6 Turn saw over and check brake band for correct position on clutch drum If brake...

Page 13: ...y 3 Hold the bar nose up and turn the tension adjuster clockwise until chain fits snugly against underside of the bar 4 Tighten both nuts with the bar nose held up 5 Pull the chain around the bar by h...

Page 14: ...d Use of ECHO brand fuel is recommended to extend engine life in all air cooled 2 stroke and 2 4 stroke hybrid engines Two Stroke Oil A two stroke engine oil such as ECHO brand 2 stroke oils meeting I...

Page 15: ...ction WARNING Momentary stop switch automatically returns to run position Engine can start unintentionally when starter handle is pulled Always remove spark plug lead from spark plug before pulling st...

Page 16: ...d maintenance procedures are followed as listed in the Maintenance Section of this manual EMISSION CONTROL INFORMATION ENGINE FAMILY EHXS 0454SA DISPLACEMENT 45 0 cc EMISSION COMPLIANCE PERIOD 300 Hou...

Page 17: ...fast idle latch condition The chain will attempt to move when engine is started with fast idle throttle latch engaged Do not start engine before chain brake is activated CAUTION After starting the en...

Page 18: ...Securely hold the chain saw as shown and pull starter handle several times until first firing sound Push choke control knob all the way in Pull starter handle again to start the engine When engine sta...

Page 19: ...omentary stop switch until the engine is stopped NOTICE 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 moen...

Page 20: ...your best aid will be your own good common sense The accepted way to hold the saw is to stand to the left of the saw with your left hand on the front handlebar and your right hand on the rear handle s...

Page 21: ...te the notch and at a level about 5 cm 2 in above the bottom of the notch Do not try to cut through to the notch with the felling cut The remaining wood between the notch cut and felling cut about 5 c...

Page 22: ...ake the cut unless the tree is lying on perfectly flat ground or supported as shown If you make the cut with the tree on the ground don t let the saw s chain dig into the earth it is harmful for the s...

Page 23: ...a fast idle Slowly operate the chain brake lever while holding the saw firmly on the ground When the brake lever trips the chain should stop Immediately release the throttle trigger WARNING If the cha...

Page 24: ...d the saw with the guide bar approximately 50 cm 20 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...

Page 25: ...kickback WARNING Do not use replacement saw chain unless it has been designated as meeting the ANSI B175 1 or CSA Z62 3 kickback performance requirements when tested on the representative sample of ch...

Page 26: ...C Clean R Replace Maintenance Procedure Notes All recommendations to replace are based on the finding of damage or wear during inspection Component system Maintenance procedure Required Skill level D...

Page 27: ...r 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 turn and repeat...

Page 28: ...stalled Install air cleaner cover and engage cleaner cover latch CHECK FUEL SYSTEM Check before every use After refueling make sure fuel does not leak from around fuel pipe fuel grommet or fuel tank c...

Page 29: ...out through oil filling hole with a piece of steel wire or the like If the filter is dirty wash it in gasoline or replace it When the inside of the tank gets dirty rinsing the tank out with gasoline c...

Page 30: ...Clean carbon deposits from muffler components Replace screen if it is cracked or has holes burned through Assemble components in reverse order NOTICE Carbon deposits in muffler will cause drop in engi...

Page 31: ...ight 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 Drive link serves to re...

Page 32: ...ent oil to it rotate the chain slowly to wash away the filings before using again If the chain saw is operated with filings clogged in the groove the saw chain and the guide bar will be damaged premat...

Page 33: ...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 plug wire Electrical problem Ask your ECHO de...

Page 34: ...guard Rear hand guard Anti vibration device Spiked bumper Throttle control lockout Chain brake Chain catcher Spark arrestor muffler Kick GuardTM STORAGE AFTER USE Inspect and adjust every part of the...

Page 35: ...T 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...

Page 36: ...36 CS 4510 C71315001001 C71315999999...

Reviews: