Echo CS-4200ES User Manual

CS-3700ES, CS-4200ES01-36C-01

1

0

INTRODUCTION

We are constantly working on technical
improvement of our products. For this reason,
technical data, equipment and design are
subject to change without notice. All
specifications, illustrations and directions in
this SERVICE DATA are based on the latest
products information available at the time of
publication.
ECHO SE R V I C E MANUAL Or d . 401­21(Model : CS-4200, CS-4400) contains lots
of information for servicing this model.
Introduction of primer and carburettor change

on CS-3700ES are informed by Technical
Information No. 2006-324.

CONTENTS

page

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

2 EMISSION ADJUSTMENT GUIDE ............... 7

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

2-2 Presetting idle adjust screw, L mixture needle

and H mixture needle ....................................... 8

2-3 Adjusting carburettor.................................. 9

Reference No. 01-36C-01

R E V I S E D : 2 0 0 6 0 7

ISSUED: 200409

INDEX

CS-3700ES

2

1 SERVICE INFORMATION

1-1 Specifications

Model CS-3700ES CS-4200ES

Dimensions Length* mm(in) 383 (15.1)

Width mm(in) 238 (9.4)

Height mm(in) 270 (10.6)
Dry weight* kg(lb) 4.4 (9.7)
Engine Type KIORITZ, air-cooled, two-stroke, single cylinder

Rotation Clockwise as viewed from the output end

Displacement cm3(in3) 35.8 (2.19) 39.6 (2.42)

Bore mm(in) 39 (1.54) 41 (1.61)

Stroke mm(in) 30 (1.18) 30 (1.18)

Compression ratio 7.4 7.45
Carburettor Type Diaphragm horizontal-draught with auto-return choke

Model WT-416C

Venturi size-Throttle bore mm(in) 13.5 - 15.85 (0.532 - 0.624)
Ignition Type CDI (Capacitor discharge ignition) system

Spark plug BPMR7A RCJ6Y
Starter Type ES (Effortless-start)

Rope diameter x length mm(in) 3.0 x 830 (0.12 x 32.7)
Fuel Type Premixed two-stroke fuel

Mixture ratio 50 : 1 (2 %)

Petrol Minimum 89 octane petrol (RON)

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

Tank capacity L (U.S.fl.oz.) 0.41 (13.9)
Clutch Type Centrifugal, 3-shoe slide with 3-tension spring
Guide bar / Saw chain lubrication type Automatic with volume adjuster
Oil Tank capacity L (U.S.fl.oz.) 0.24 (8.1)
Sprocket Type Spur

Number of teeth 7

Pitch in 0.325

SERVICE INFORMATION

Walbro WT-812 with primer**

CS-4200ES

Ventilated piston

Walbro WT-594

* Without guide bar and saw chain.
** Primer is installed on switch bracket since serial number 36008701 on CS-3700ES.

Cutting devices

Guide bar Type 33RD58-325 38RD58-325 43RD58-325

Called length cm 33 38 43

Gauge in 0.058

Saw chain Number of drive links 56 64 72

Pitch in 0.325
Gauge in 0.058

CS-3700ES
CS-4200ES

1-2 Technical data

Model CS-3700ES CS-4200ES

Engine

Idling speed r/min 2300 - 3000
Operating speed* r/min 8500 - 9000
High speed (No load full throttle)* r/min 11500 - 12500
Clutch engagement speed* r/min 3500 - 4300
Compression pressure MPa (kgf/cm2) (psi) 1.0 (10) (145) 1.15 (11.5) (165)

Ignition system

Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1000 r/min kV 15
Secondary coil resistance kΩ 1.7 - 2.2
Pole shoe air gaps mm(in) 0.35 - 0.45 (0.014 - 0.018)
Ignition timing at 1500 r/min °BTDC 25

Carburettor WT-416C WT-812 WT-594

Idle adjust screw initial setting turns in** 1 1/8 1 3/4 1 3/8
L mixture needle initial setting turns back 1 1/4 1 1/4
H mixture needle initial setting turns back 3 3 1/2 2 5/8
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 at 7000 r/min Adjustable : 1.5 - 13 (0.05 - 0.40)

mL/min(U.S.fl.oz./min) (Factory set 7 mL/min)
BTDC: Before top dead centre.
*With 38cm guide bar and saw chain.

**Set idle adjust screw to contact throttle plate before initial setting.

SERVICE INFORMATION

3