Yamabiko Echo SRM-2620ES User manual

Ref. No. 402-43
SRM-2620ES
SRM-2620TES
ECHO:
shindaiwa:
T262XS C262S
T262TXS C262TS
(Serial number: 37000001 and after)
Copyright C 2018 YAMABIKO Corporation All rights reserved.

INTRODUCTION
This service manual contains information for
service and maintenance of ECHO TRIMMER
/ BRUSHCUTTER, models SRM-2620ES,
SRM-2620TES, shindaiwa T262XS, C262S,
T262TXS and C262TS.
For systematic diagnosis, to avoid extra work
and time loss, please refer to “Troubleshooting
guide” that describes problems, testings, rem-
edies and references. We recommend you make
use of Operator’s Manual and Parts Catalogue
together with this manual when servicing.
We are constantly working on technical improve-
ment of our products. For this reason, technical
data, equipment and design are subject to
change without notice. All specifications, illustra-
tions and directions in this manual are based on
the latest products information available at the
time of publication.
NOTE: This service manual contains pictures
with different model name for other markets and
different colored model.

TABLE OF CONTENTS
SRM-2620ES, SRM-2620TES
T262XS, C262S
T262TXS, C262TS 1
Page Page
1 SERVICE INFORMATION.....................................2
1-1 Specifications...................................................2
1-2 Technical data ..................................................3
1-3 Torque limits.....................................................5
1-4 Special repairing materials...............................5
1-5 Service limits....................................................6
1-6 Special tools.....................................................7
2 STARTER SYSTEM..............................................8
2-1 Disassembling starter assembly.......................9
2-2 Replacing starter rope....................................10
2-3 Replacing rope guide .....................................12
2-4 Installing rewind spring...................................12
2-5 Assembling starter..........................................13
2-6 Replacing starter pawl....................................15
3 IGNITION SYSTEM.............................................17
3-1 Troubleshooting guide....................................17
3-2 Testing spark..................................................18
3-3 Inspecting spark plug .....................................18
3-4 Inspecting ignition switch................................19
3-5 Replacing ignition switch................................20
3-6 Inspecting ignition coil resistance...................23
3-7 Replacing spark plug cap and coil..................24
3-8 Replacing ignition coil.....................................24
3-9 Setting pole shoe air gaps..............................25
3-10 Inspecting flywheel and key ...........................25
4 FUEL SYSTEM ...................................................27
4-1 Cleaning air filter ............................................28
4-2 Checking fuel cap and fuel strainer................28
4-3 Inspecting fuel tank and tank vent..................29
4-4 Replacing fuel line, fuel return line, tank vent
line and grommet............................................30
4-5 Adjusting carburetor.......................................32
4-5-1 General adjusting rules ..................................32
4-5-2 Initial setting Throttle adjust screw, L mixture
needle and H mixture needle ........................32
4-5-3 Adjusting carburetor.......................................33
4-6 Testing carburetor...........................................34
4-7 Inspecting crankcase pulse passage .............35
4-8 Inspecting metering lever height ....................35
4-9 Inspecting inlet needle valve..........................36
4-10 Inspecting diaphragm and others...................36
4-11 Replacing throttle cable and control parts......37
4-12 Checking and adjusting throttle cable ............37
5 CLUTCH SYSTEM..............................................38
5-1 Removing clutch shoes and springs...............39
5-2 Installing clutch shoes....................................39
5-3 Removing clutch drum....................................40
5-4 Removing clutch drum bearings.....................41
5-5 Installing bearings and clutch drum................41
6 ENGINE...............................................................42
6-1 Testing cylinder compression.........................43
6-2 Cleaning cooling air passages .......................43
6-3 Inspecting muffler and exhaust port...............44
6-4 Testing crankcase and cylinder sealing..........45
6-5 Removing and inspecting cylinder..................45
6-6 Inspecting piston and piston ring....................46
6-7 Replacing needle bearing...............................46
6-8 Inspecting crankcase and crankshaft.............47
6-9 Replacing oil seal...........................................47
6-10 Replacing ball bearing....................................48
6-11 Assembling crankshaft and crankcase...........48
6-12 Installing piston...............................................49
6-13 Installing piston ring and cylinder...................49
7 CUTTER DRIVE SYSTEM..................................50
7-1 Disassembling gear case...............................52
7-2 Replacing gears and PTO shaft.....................53
7-3 Assembling gear case....................................55
8 MAINTENANCE GUIDE......................................56
8-1 Service Intervals.............................................56
8-2 Disassembly Chart.........................................57
8-3 Troubleshooting guide....................................58

SERVICE INFORMATION
2SRM-2620ES, SRM-2620TES
T262XS, C262S
T262TXS, C262TS
1 SERVICE INFORMATION
1-1 Specifications
Model SRM-2620ES (L)
T262XS SRM-2620TES (L) T262TXS SRM-2620ES (U) C262S SRM-2620TES (U) C262TS
Dimensions* Length mm (in) 1778 (70.0) 1789 (70.4) 1778 (70.0) 1789 (70.4)
Width mm (in) 340 (13.4) 695 (27.4)
Height mm (in) 311 (12.2) 445 (17.5) 497 (19.6)
Dry weight* kg (lb) 6.0 (13.3) 6.2 (13.7) 6.1 (13.5) 6.4 (14.3)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Anticlockwise as viewed from the output end
Displacement cm3 (in3) 25.4 (1.550)
Bore mm (in) 34.0 (1.339)
Stroke mm (in) 28.0 (1.102)
Compression ratio 7.6
Carburettor Type Diaphragm, horizontal-draught
Model WALBRO WYG-9
Venturi size - Throttle bore mm (in) 10.5 - 10.5 (0.413 - 0.413)
Ignition Type CDI (Capacitor discharge ignition) system
Digital magneto
Spark plug NGK CMR7H
Exhaust Muffler type Spark arrester muffler with catalyst
Starter Type ES (Effortless-Start) / S (Soft-start)
Rope diameter x length mm (in) 3.5 x 850 (0.14 x 33.5)
Fuel** Type Premixed two-stroke fuel
Mixture ratio 50 : 1 (2%)
Petrol Minimum 89 octane
Two-stroke engine oil ISO-L-EGD (ISO/CD13738), JASO FC/FD
Tank capacity Full tank capacity: 0.6 (20.3)
L (U.S.fl.oz.) Usable capacity: 0.52 (17.6)
Clutch Type Centrifugal, 2-shoe pivot
Handle Type Front Crescent loop w/ cushion grip U-handle w/ integrated
control grip
Rear Integrated control grip w/ cushion
Drive shaft Type Solid type with spline (7-tooth)
Diameter - Length mm (in) 7 - 1540 (0.27 - 60.62)
Housing OD - ID mm (in) 25.0 - 22.0 (0.98 - 0.87)
Length mm (in) 1500 (59.1)
Gear case Reduction ratio 1.36 2.07 1.36 2.07
Gear tooth Spiral bevel gear
Lubrication Lithium based grease
Cutter Type Nylon line
cutter F4 Nylon line cutter Z5
Nylon line
cutter F4 Nylon line
cutter Z5
3-tooth blade
(230 mm)
Pilot diameter for blade mm (in) 25.4 (1.0)
Fastener type, size mm Left-hand thread nut, M10 x 1.25 pitch
Cutting rotation Anticlockwise as viewed from top
OD: Outer diameter. ID: Inner diameter.
* Without shoulder harness and cutter. ** Refer to Operator’s manual.

SERVICE INFORMATION 3
SRM-2620ES, SRM-2620TES
T262XS, C262S
T262TXS, C262TS
1-2 Technical data
Engine
Compression pressure MPa (kgf/cm2) (psi) 0.97 (9.8) (140)
Clutch engagement speed r/min 4,100
Engagement Minimum†r/min 3,800
Ignition system
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Spark test
Tester gap w/ spark plug mm(in) 4.0 (0.16)
Tester gap w/o spark plug mm(in) 6.0 (0.24)
Secondary coil resistance Ω960 - 1,000
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing at 2,900 r/min °BTDC 9
at 6,500 r/min °BTDC 22
at 8,500 r/min °BTDC 33
at 11,000 r/min °BTDC 19
Carburettor
Test Pressure, minimum MPa (kgf/cm2) (psi) 0.05 (0.5) (7.0)
Metering lever height mm(in) 0.66 (0.03) lower than diaphragm seat
Tool to adjust mixture needles
Screwdriver 2.5 mm P/N X603-000050
D-shaped tool (S) P/N X645-000022
(Carb. adjustment tool P/N Y089-000094)
BTDC: Before top dead centre
†If clutch engagement speed is lower than minimum clutch engagement speed, replace clutch assembly with
new one.