Echo CS-271T User manual

CARBURETOR ADJUSTMENT PROCEDURE

.... 7

2-1 General adjusting rules............................... 7

2-2 Presetting Idle adjust screw, L mixture

needle

and H mixture needle ........................................ 7

2-3 Adjusting carburetor.................................... 9

00-27A-00 CS-271T 1

SERVICE

MANUAL

SUPPLEMENT

CHAIN SAW

ECHO:

CS-271T

(Serial

number

11000001-11999999)

(Serial

number

12000001-12999999)

(Serial

number

13000001-13999999)

INTRODUCTION CONTENTS

page

We are constantly working on technical im-

provement of our products. For this reason,

technical data, equipment and design are

subject to change without notice. All speci-

fications and directions in this SERVICE

MANUAL SUPPLEMENT are based on the

latest product information available at the

time of publication.

1 SERVICE INFORMATION.............................. 2

1-1 Specification ............................................... 2

1-2 Technical data............................................. 3

1-3 Torque limits................................................ 4

1-4 Special repairing materials ......................... 4

1-5 Service limits............................................... 5

1-6 Special tools ............................................... 6

Reference No. 00-27A-00

ISSUED: 201 105

SERVICE INFORMATION

CS-271T

Cutting devices

Guide bar

Part No. 10A4CD3740 12A4CD3745

Called length in

Gauge in 0.043

Saw chain

Number of drive links

Pitch in 3/8

Gauge in

0.043

1 SERVICE

INFORMA

TION

1-1

Speci

cations

Model CS-271T

Dimensions Length* mm(in) 257 (10.12)

Width mm(in) 228 (8.98)

Height mm(in) 210 (8.27)

Dry weight* kg(lb) 3.0 (6.6)

YAMABIKO, air-cooled, two-stroke, single cylinder

Engine Type

gasoline engine

Rotation Clockwise as viewed from the output end

Displacement cm3(in3) 26.9 (1.641)

Bore mm(in) 35.0 (1.378)

Stroke mm(in) 28.0 (1.102)

Compression ratio 6.6

Carburetor Type Diaphragm horizontal-draft

Model Walbro WT-1008

Venturi size-Throttle bore mm(in) 11.11-14.3 (0.437-0.563)

Ignition Type CDI (Capacitor discharge ignition) system

Digital Magneto

Spark plug BPM8Y (CANADA: BPMR8Y)

Starter Type Automatic rewind starter

Rope diameter x length mm(in) 3.5x700 (0.14x27.6)

Fuel Type Premixed two-stroke fuel

Mixture ratio 50 : 1 (2 %)

Gasoline Minimum 89 octane gasoline

Two-stroke air cooled engine oil ISO-L-EGD (ISO/CD13738), JASO M345-FC/FD

Tank capacity L (U.S.fl.oz.) 0.24 (8.1)

Exhaust Muffler type

Spark arrester muffler

Clutch

Type

Centrifugal type, 3-shoe slide with 3-tension spring

Guide bar / Saw chain lubrication type Adjustable automatic oil pump

Oil Tank capacity L (U.S.fl.oz.) 0.16 (5.4)

Auto oiler Type

Clutch related type

Sprocket Type

Spur

Number of teeth

Pitch

3/8

* Without guide bar and saw chain.

Oregon Saw chain 90SG

CS-271T

SERVICE INFORMATION

Oregon Saw chain 91VG as option

Cutting devices

Guide bar

Part No. 10A0CD3740 12A0CD3745

Called length in

Gauge in 0.050

Saw chain

Number of drive links 40 45

Pitch in 3/8

Gauge in 0.050

1-2

Technical data

Engine

Idling speed

RPM

3,200 +/- 300

Wide open throttle speed*

RPM

11,300 - 12,500

Clutch engagement speed

RPM

4,400

Engagement Minimum† RPM 3,800

Compression pressure MPa (kgf/cm2) (psi) 0.85 (8.7) (124)

Ignition system

Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)

Minimum secondary voltage at 1,500 RPM kV 17

Primary coil resistance

(Red Probe on stop terminal of module) MΩ2.0 - 2.5

Secondary coil resistance Ω930 - 970

Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)

Ignition timing at 3,000 RPM

°BTDC 16

at 8,000 RPM °BTDC 31

at 10,000 RPM °BTDC 32

Carburetor

Idle adjust screw initial setting turns in** 7/8

Test Pressure, minimum MPa (kgf/cm2) (psi) 0.05 (0.5) (7.0)

Metering lever height mm(in) 1.65 (0.06) lower than diaphragm seat

Chain oil discharge volume Adjustable: 1.5 - 13 (0.05 - 0.40)

mL/min(U.S.fl.oz./min) (Factory set: 7 mL/min)

BTDC: Before top dead center.

* With 12 in. guide bar and properly adjusted saw chain.

**Set idle adjust screw to the point that its tip contacts throttle plate before initial setting.

† If clutch engagement speed is lower than minimum RPM, replace clutch assembly with new one.

SERVICE INFORMATION

CS-271T

1-3 Torque

limits

Descriptions Size kgf•cm

N•m in•lbf

Starter

system

Starter pawl M5* 30 - 45

3 - 4.5 25 - 40

Starter case M5 10 - 20

1 - 2 9 - 18

Ignition

system

Magneto rotor (Flywheel) M8 250 - 290

25 - 29 220 - 255

Ignition coil M4* 30 - 45

3 - 4.5 25 - 40

ON-OFF switch M3* 3 - 5

0.3 - 0.5 3 - 4

Spark plug M14 130 - 170

13 - 17 113 - 150

Fuel

system

Carburetor M5 30 - 45

3 - 4.5 25 - 40

Intake

bellows M4 35 - 50

3.5 - 5 30 - 45

Clutch Clutch hub LM10 230 - 260

23 - 26 200 - 230

Engine

Crankcase M5* 55 - 95

5.5 - 9.5 48 - 85

Engine mount M5 70 - 110

7 - 11 60 - 95

Dust cover M4 10 - 20

1 - 2 9 - 18

Eye plate M4 10 - 20

1 - 2 9 - 18

Muffler M5 70 - 100

7 - 10 60 - 90

Muffler cover M5 10 - 20

1 - 2 9 - 18

Others

Exhaust guide M4 15 - 25

1.5 - 2.5 13 - 22

Auto-oiler M4 20 - 35

2 - 3.5 18 - 30

Front handle M5 20 - 40

2 - 4 18 - 35

Top handle M4 10 - 20

1 - 2 9 - 18

Top handle assembly M4 20 - 30

2 - 3 18 - 25

Cushion M4 10 - 20

1 - 2 9 - 18

Brake cover M4 10 - 20

1 - 2 9 - 18

Sprocket guard plate M4 10 - 20

1 - 2 9 - 18

Brake lever (Hand guard) M5 25 - 45

2.5 - 4.5 22 - 40

Chain catcher M5 20 - 40

2 - 4 18 - 35

Guide bar stud M8 180 - 250

18 - 25 160 - 220

Bolt (at guide bar mount) M4 20 - 40

2 - 4 18 - 35

Regular bolt, nut and screw

M3 6 - 10

0.6 - 1 5 - 9

M4 15 - 25

1.5 - 2.5 13 - 22

M5 25 - 45

2.5 - 4.5 22 - 40

M6 45 - 75

4.5 - 7.5 40 - 65

LM: Left-hand thread *Apply special repairing materials

1-4 Special

repairing materials

Material

Location

Remarks

Adhesive

Ball bearing outer / crankcase

Loctite #675 or equivalent

Liquid gasket

Crankcase seams

ThreeBond 1207D

Thread locking sealant

Starter pawl

Loctite #222, ThreeBond #1342 or equivalent

Ignition coil

ON-OFF switch

Loctite #242, ThreeBond #1324 or equivalent

Grease

Clutch needle bearing

Lithium based grease or ECHO XTended

Protection TM Lubricant

Rear handle cushion

Collar

Starter grip rope guide

Oil seal lip

Chain brake (metal contact part)

Molybdenum grease (approx.1 gram)

CS-271T

SERVICE INFORMATION

5K097

1-5 Service

Limits

A B C D

5K177 5K083 5K084

5K081

E F G H

5K082 5K016

5K025

5K178

K L M P

5K173

5K174

5K190

5K191

Description mm (in)

A Cylinder bore When plating is worn and aluminum can be seen

B Piston outer diameter Min. 34. 91 (1.374)

C Piston pin bore Max. 8. 035 (0.3163)

D Piston ring groove Max. 1. 6 (0.063)

E Piston ring side clearance Max. 0. 1 (0.004)

F Piston pin outer diameter Min. 7. 98 (0.3142)

G Piston ring width Min. 1. 45 (0.057)

H Piston ring end gap Max. 0. 5 (0.02)

K Con-rod small end bore Max. 12. 00 (0.4724)

L Crankshaft runout

Max. 0. 02

(0.001)

Sprocket bore

Max.

12. 80

(0.5039)

N Clutch drum bore Max. 55. 5 (2.19)

P Sprocket wear limit Max. 0. 5 (0.02)

SERVICE INFORMATION

CS-271T

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