Echo CS-3700ES Service Data
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01-36C-01
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 SERVICE MANUAL Ord. 401-
21(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.
INDEX
CS-3700ES, CS-4200ES
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
and H mixture needle ....................................... 8
2-3 Adjusting carburettor .................................. 9
CONTENTS
01-36C-01
Reference No.
R E V I S E D :
2 0 0 6 0 7
ISSUED: 200409
1
0
page

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Summary of Contents for Echo CS-3700ES

  • Page 1: Table Of Contents

    H mixture needle ........8 Introduction of primer and carburettor change 2-3 Adjusting carburettor ........9 on CS-3700ES are informed by Technical Information No. 2006-324. 01-36C-01 Reference No. R E V I S E D :...
  • Page 2: Service Information

    0.24 (8.1) Sprocket Type Spur Number of teeth Pitch 0.325 * 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 Gauge 0.058...
  • Page 3: Technical Data

    CS-3700ES CS-4200ES SERVICE INFORMATION 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...
  • Page 4: Torque Limits

    CS-3700ES SERVICE INFORMATION CS-4200ES 1-3 Torque limits Descriptions Size kgf•cm N•m in•lbf Starter Starter pawl M 5* 40 - 60 4 - 6 35 - 50 system Starter case 10 - 20 1 - 2 9 - 18 Ignition Magneto rotor (Flywheel)
  • Page 5: Service Limits

    CS-3700ES CS-4200ES SERVICE INFORMATION 1-5 Service Limits 5K177 5K177 5K083 5K084 5K081 5K082 5K016 5K025 5K178 5K191B 5K173 5K174 5K171 mm (in) A Cylinder bore When plating is worn and aluminium can be seen B Piston outer diameter Min. 38.91 (1.53) 40.94 (16.12)
  • Page 6: Special Tools

    CS-3700ES SERVICE INFORMATION CS-4200ES 1-6 Special tools a = 3 mm a = 4 mm Key Part Number Description Used for: 897801-33330 Tachometer PET-1000 Measuring engine speed to adjust carburettor 895612-79920 L-hex wrench (3 mm) Removing and installing hex. socket bolt (M4)
  • Page 7: Emission Adjustment Guide

    CS-3700ES SERVICE INFORMATION CS-4200ES 2 EMISSION ADJUSTMENT GUIDE 2-1 General adjusting rules A. Before starting the unit for adjustment, check the following items. 1. The correct spark plug must be clean and properly gapped. 2. The air filter element must be clean and properly installed.
  • Page 8: Presetting Idle Adjust Screw, L Mixture Needle And H Mixture Needle

    Turn idle adjust screw anticlockwise and set the screw until the tip just contacts the throttle plate. Then turn idle adjust screw 1 1/8 (CS-3700ES : Serial Number 36000001 - 36008700),1 3/4(CS-3700ES: Serial Number 36008701 and after), 1 3/8(CS-4200ES)
  • Page 9: Adjusting Carburettor

    CS-3700ES SERVICE INFORMATION CS-4200ES 2-3 Adjusting carburetor 1. Start engine and warm it up at idle for one minute. Idle adjust screw Turn H mixture needle anticlockwise until engine speed drops to approx. 11,000 r/min. 2. Warm it up well for 100 sec with cycle of 5 seconds at WOT (Wide Open Throttle) and 5 seconds at idling.

This manual is also suitable for:

Cs-4200es

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