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1

INTRODUCTION

We are constantly wor king 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 infor mation

available at the time of publication.

For further information to service these models,

please refer to ECHO SERVICE MANUAL Ord. No.

402-21.

TRIMMER/BRUSHCUTTER

SRM-3805
SRM-4605

Reference No. 

10-37A-00

I S S U E D :   1 9 9 8 0 7

SERVICE DATA

1

10-37A-00

SRM-3805, SRM-4605

CONTENTS

page

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

1-1 Specifications ............................................ 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 SERVICE HINT  ............................................. 7

2-1 Gear case construction ............................. 7

INDEX

Summary of Contents for SRM-3805

Page 1: ...on available at the time of publication For further information to service these models please refer to ECHO SERVICE MANUAL Ord No 402 21 TRIMMER BRUSHCUTTER SRM 3805 SRM 4605 Reference No 10 37A 00 I...

Page 2: ...h primer without primer Model WALBRO WT 297 WALBRO WT 120B Venturi size Throttle bore mm in 11 11 15 85 0 437 0 624 12 7 15 85 1 2 0 624 Ignition Type Capacitor discharge ignition system in a single i...

Page 3: ...0 4 0 012 0 016 Ignition timing BTDC 25 Carburetor Type Diaphragm horizontal draught Supplier Walbro WT 297 Walbro WT 120B Venturi Size mm in 11 11 0 437 12 7 1 2 Throttle Bore mm in 15 85 0 624 15 85...

Page 4: ...lutch drum case M 5 70 100 60 95 Engine Crankcase M 5 70 110 60 95 Cylinder M 5 70 110 60 95 Cylinder cover M 5 30 45 26 40 Top guard M 5 30 45 26 40 Muffler M 5 60 100 52 85 Muffler bracket M 5 30 45...

Page 5: ...06 2nd Max 0 1 0 004 0 1 0 004 F Piston pin outer diameter Min 9 98 0 3929 9 98 0 3929 G Piston ring width Min 1 15 0 045 1 15 0 045 H Piston ring end gap Max 0 5 0 02 0 5 0 02 K Connecting rod small...

Page 6: ...alling drive gear assembly into gear case 11 897714 24330 Oil seal tool Installing drive gear ball bearings Installing PTO shaft ball bearing Installing crankcase oil seal starter side 12 897718 02830...

Page 7: ...2 SERVICE HINT 2 1 Gear case construction 7 SERVICE INFORMATION SRM 3805 SRM 4605 Drive gear Driven gear PTO shaft Nut Adapter plate L Gear case Adapter plate U Cover plate Dust seal plate O ring...

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