Echo CS-370ES User Manual

CS-370ES01-36E-00

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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.

INDEX

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 CARBURETTOR ADJUSTMENT PROCEDURE .

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

2-2 Presetting idle adjust screw, L mixture needle

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

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

Reference No. 01-36E-00

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ISSUED: 200703

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1 SERVICE INFORMATION

1-1 Specifications

Model CS-370ES

Dimensions Length* mm(in) 393 (15.5)

Width mm(in) 245 (9.6)

Height mm(in) 277 (10.9)

Dry weight* kg(lb) 4.6 (10.1)

Engine Type KIORITZ, air-cooled, two-stroke, single cylinder

Rotation Clockwise as viewed from the output end

Displacement cm3(in3) 36.3 (2.22)

Bore mm(in) 38.0 (1.50)

Stroke mm(in) 32.0 (1.26)

Compression ratio 7.6

Carburetor Type Diaphragm horizontal-draught, with auto-return choke**

Model Walbro WT-820A

Venturi size-Throttle bore mm(in) 13.5 - 15.85 (0.532 - 0.624)

Ignition Type Digital Magneto : CDI system

Spark plug BPMR8Y

Starter Type ES (effortless)-start

Rope diameter x length mm(in) 3.0 x 900 (0.14 x 35.4)

Fuel Type Premixed two-stroke fuel

Mixture ratio 50 : 1 (2 %)

Petrol Minimum 89 octane petrol

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.) 0.28 (9.5)

Auto oiler Type clutch related type

Sprocket Type Spur

Number of teeth 6

Pitch in 3/8

SERVICE INFORMATION

CS-370ES

* Without guide bar and saw chain.
** Auto-return choke is on switch bracket.

Cutting devices

Guide bar Type 30RC50M-3/8 35RC50M-3/8

Called length cm 30 35

Gauge in 0.050

Saw chain Type OREGON 91VG

Number of drive links 47 53

Pitch in Low profile 3/8

Gauge in 0.050

CS-370ES

1-2 Technical data

Engine

Idling speed r/min 2400 - 2900

Wide open throttle speed* r/min 11500 - 12500

Clutch engagement speed r/min 3800 - 4300

Compression pressure MPa (kgf/cm2) (psi) 1.02 (10.4) (148)

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 1.5 - 2.2

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

Ignition timing at 3000 r/min °BTDC 10

at 8000 r/min °BTDC 32

at 10,000 r/min °BTDC 34

at 12,500 r/min °BTDC 32

Carburetor

Idle adjust screw initial setting turns in** 1 5/8

L mixture needle initial setting turns back 1 1/4

H mixture needle initial setting turns back 2 3/8

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 center.

* With 35 cm guide bar and saw chain.

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

SERVICE INFORMATION

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