Yamabiko Echo SRM-222ES Mounting instructions

GT-222ES, SRM-222ES, F226S, T226S, C226S
10-21U-00 1
INTRODUCTION
We are constantly working on technical im-
provement of our products. For this reason,
technical data, equipment and design are
subject to change without notice. All speci-
fications and directions in this SERVICE
DATA are based on the latest product infor-
mation available at the time of publication.
1
SERVICE DATA
TRIMMER/BRUSHCUTTER
ECHO:
GT-222ES/SRM-222ES
shindaiwa: F226S/T226S/C226S
STAGE MODEL
(Serial number : 37000001 and after)
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 CARBURETOR ADJUSTMENT PROCEDURE
... 7
2-1 General adjusting rules............................... 7
2-2 Presetting Idle adjust screw, Idle mixture
needle and Hi speed mixture needle................. 7
2-3 Adjusting carburetor.................................... 8
Reference No. 10-21U-00
ISSUED: 201206

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S
2
1 SERVICE INFORMATION
1-1 Specifications
Model GT-222ES
F226S
SRM-222ES (L)
T226S
SRM-222ES (U)
C226S
Dimentions* Length mm (in) 1460 (57.5) 1760 (69.3)
Width mm (in) 320 (12.6) 345 (13.6) 655 (25.8)
Heigh mm (in) 575 (22.6) 320 (12.6) 420 (16.5)
Dry weight* kg (lb) 4.5 (9.9) 5.1 (11.2) 5.2 (11.4)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Anticlockwise as viewed from the output end
Displacement cm3 (in3) 21.2 (1.29)
Bore mm (in) 32.2 (1.27)
Stroke mm (in) 26.0 (1.02)
Compression ratio 6.9
Carburettor Type Rotary type : Diaphragm, horizontal-draught, with primer
Model ZAMA RB-K113
Ignition Type CDI (Capacitor discharge ignition) system
with electronic timing advancer and speed governor : VST
Spark plug BPMR8Y
Exhaust Muffler type Spark arrester muffler with catalyst
Starter Type ES (effortless-start)
Rope diameter x length mm (in) 3.0 x 820 (0.12 x 32.2)
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 L (U.S.fl.oz.) 0.38 (12.8)
Clutch Type Centrifugal, 2-shoe pivot
Handle Type
Front : Crescent loop with cushion grip
U-handle with integrated
control grip
Rear : Integrated control grip with cushion
Drive shaft Type Flexible
Diameter - Length mm (in) 6.1 - 1330 (0.24 - 52.36) 6.15 - 1522 (0.24 - 59.92)
Housing OD - ID mm (in) 25.0 - 22.0 (0.98 - 0.87) 25.0 - 22.0 (0.98 - 0.87)
Main pipe Length mm (in) 1330 (52.4) 1500 (59.1)
Gear case Reduction ratio --- 1.36
Gear tooth --- Spiral bevel gear
Lubrication Lithium based grease or ECHO XTended Protection TM Lubricant
Cutter Type Nylon line cutter 3-tooth blade (230 mm)
Arbor diameter for blade mm (in) --- 25.4 (1.0)
Fastener type, size mm Standard thread 3/8
inch - 24UNF Left-hand thread nut, M10 x 1.25 pitch
Cutting rotation Clockwise as
viewed from top Anticlockwise as viewed from top
OD: Outer diameter. ID: Inner diameter. * Without shoulder harness and standard cutter.
** Refer to Operator’s manual.

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S 3
1-2 Technical data
Model GT-222ES
F226S
SRM-222ES (L)
T226S
SRM-222ES (U)
C226S
Engine
Idling speed r/min 3,000 +/- 400
Wide open throttle speed r/min 6,700 - 7,700* 9,000 - 10,000* 10,500 - 11,500**
Clutch engagement speed r/min 3,750
Engagement Minimum†r/min 3,500
Compression pressure MPa (kgf/cm2) (psi) 0.9 (9.1) (130)
Ignition system with stop holding function
Spark plug gap mm(in) 0.6 - 0.7 (0.024 - 0.028)
Minimum secondary voltage at 1500 r/min kV 18
Primary coil resistance Ω320 - 420
Secondary coil resistance kΩ2.7 - 3.3
Pole shoe air gaps mm(in) 0.3 - 0.4 (0.012 - 0.016)
Ignition timing at 3,000 r/min °BTDC 18
at 8,000 r/min °BTDC 34
at 11,000 r/min °BTDC 14
Carburettor
Venturi Size 9.0 (0.354)
Throttle Bore 10.5 (0.413)
Idle adjust screw initial setting turns out 8 7/8
L mixture needle initial setting turns out 3 7/8
H mixture needle initial setting turns out 1 1/8
Test Pressure, minimum MPa (kgf/cm2) (psi) 0.05 (0.5) (7.0)
Metering lever height mm(in) 0.1 - 0.25 (0.004 - 0.01) lower than diaphragm seat
BTDC: Before top dead centre.
*With Nylon line cutter and shield.
**With 3-tooth blade (230 mm).
†If clutch engagement speed is lower than service limit speed, replace clutch assembly with new one.

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S
4
1-3 Torque limits
Descriptions Size kgf•cm N•m in•lbf
Starter Starter pawl assembly M 8 80 - 100 8 - 10 70 - 90
system Starter case M 4* 30 - 45 3 - 4.5 25 - 40
Ignition Flywheel M 8 160 - 200 16 - 20 140 - 175
system Ignition coil M 4 35 - 50 3.5 - 5 30 - 44
Fan cover M 5 30 - 45 3 - 4.5 25 - 40
Spark plug M 14 130 - 170 13 - 17 112 - 150
Fuel Carburettor M 5 30 - 45 3 - 4.5 25 - 40
system Intake insulator M 5* 35 - 45 3.5 - 4.5 30 - 40
Fuel tank with stand M 5* 40 - 60 4 - 6 35 - 55
Cylinder cover Fan cover side M 5 25 - 45 2.5 - 4.5 22 - 40
Recoil side†M 5 30 - 40 3 - 4 25 - 32
Engine Crankcase M 5 70 - 110 7 - 11 60 - 95
Cylinder M 5 70 - 110 7 - 11 60 - 95
Muffler M 5* 90 - 110 9 - 11 80 - 95
Exhaust guide M 4 15 - 30 1.5 - 3 13 - 25
Muffler cover Fan cover side M 5* 30 - 40 3 - 4 25 - 32
Recoil side†M 5* 25 - 45 2.5 - 4.5 22 - 40
Other Cutter fastener LM 10 280 - 320 28 - 32 245 - 280
Regular bolt, nut and screw M 3 6 -10 0.6 - 1 5 - 9
M 4 15 -25 1.5 - 2.5 13 - 22
M 5 25 -45 2.5 - 4.5 22 - 40
M 6 45 -75 4.5 - 7.5 40 - 65
M 8 110 -150 11 - 15 95 - 130
LM: Left-hand thread. † Tapping screw
* Apply thread locking sealant. (See below)
** The torque differences among four bolts should not exceed 20 kgf•cm (2N•m, 17in•lbf) on one cylinder or crankcase
1-4 Special repairing materials
Material Location Remarks
Grease Drive shaft
Gear case
Rewind spring
Lithium based grease or ECHO XTended Protection
TM
Starter centre post Lubricant
Oil seal inner lips
Thread locking Starter case
sealant Muffler
Muffler cover Loctite #242, ThreeBond #1324 or equivalent
Fuel tank
Intake insulator Loctite #675

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S 5
1-5 Service limits
5K228 5K229 5K230
5K231 5K016 5K042
0123456789
10 11 12
0510
5K171 5K232
5K219
5K268
5K269
ABCD
EFGH
KLM
Description mm (in)
A Cylinder bore When plating is worn and aluminium can be seen
BPiston outer diameter Min. 32. 10 (1.264)
CPiston pin bore Max. 8. 030 (0.3161)
DPiston ring groove Max. 1. 6 (0.063)
EPiston ring side clearance Max. 0. 1 (0.004)
FPiston pin outer diameter Min. 7. 97 (0.3138)
GPiston ring width Min. 1. 45 (0.057)
HPiston ring end gap Max. 0. 5 (0.02)
KCon-rod small end bore Max. 12. 000 (0.4724)
LCrankshaft runout Max. 0. 03 (0.001)
MClutch drum bore Max. 51. 5 (2.03)

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S
6
Ignition Air Gap Gauge
#.014 = .35mm
P/N 91004
ECHO
0
0.4
50
0.8
1.2
1.
MPa
0
b
PET-304
Key Part Number Description Used for:
1 G310-000050 Tachometer PET-304 Measuring engine speed to adjust carburettor
2 363018-00310 Washer Installing crankcase oil seal
3 X605-000050 Torx L wrench Removing and installing bolt
4 897603-23030 PTO shaft puller Removing driven (PTO) shaft
5 897701-06030 Bearing wedge Removing ball bearings on crankshaft
6 897701-14732 Bearing tool Removing and installing crankcase ball bearings
7 897702-30131 Piston pin tool Removing and installing piston pin (Use 8 mm dia. adapter.)
8 91004 Module air gap gauge Adjusting pole shoe air gaps
9 897712-04630 2-pin wrench Removing and installing pawl carrier
10 91020 Limiter plug tool Removing and installing plug
11 897726-09130 Oil seal tool Installing crankcase oil seals
12 990511-30023 Spark tester Checking ignition system
13 897803-30133 Pressure tester Checking carburettor and crankcase leakages
14 900100-08008 Bolt Removing magneto rotor (flywheel)
15 433019-12330 Flange nut Removing magneto rotor (flywheel)
16 91037 Compression gauge Measuring cylinder compression
1-6 Special tools
1
6
14
15
7
3
8
16
10
5
912
11
24
13

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S 7
2 CARBURETTOR ADJUSTMENT PROCEDURE
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.
3. The muffler exhaust port must be clear of carbon.
4. The fuel lines, tank vent and fuel filter are in good condition and clear of debris.
5.
The fuel is fresh ( > 89 octane : RON ) and properly mixed at 50 : 1 with “ISO L-EGD” or “JASO FC/FD” 2-stroke oil.
6. Install nylon line cutter with 2 nylon lines with 145 mm cut by shield knife, even if 3-tooth blade is in-
stalled, for proper engine loading to make sure engine speed on GT-222ES, SRM-222ES, F226S, T226S
and C226S.
B. Adjustment with limiter plugs on carburettor.
Start and run engine for 3 minute alternating engine speed between WOT for 50 seconds and idle for 10 sec-
onds.
Adjust idle engine speed to 3,000 +/- 100 r/min by turning Idle adjust screw. Confirm WOT engine speed
approx. 9,500 r/min on SRM-222ES, T226S and C226S, and approx. 7,200 r/min on GT-222ES and F226S. If
engine does not run correctly after this adjustment, proceed to the next step 2-2.
IMPORTANT : After adjusting carburettor according to the steps 2-2 and 2-3, the limiter plug(s) must
be installed in Idle and Hi speed mixture needle(s) hole(s) to comply with Emission Directive.
2-2 Presetting Idle adjust screw, Idle mixture needle and Hi speed mixture needle
Tools Required : Small screwdriver with 2.5 mm
blade, P/N G310-000050 electronic tachometer,
P/N 91020 limiter cap tool with 2.5 mm left-hand
thread. Parts Required : (2) limiter plug P/N P005-
001270
1. Remove plugs from Idle mixture needle hole (A)
and Hi speed mixture needle hole (B) using limiter
plug tool (C) as follows.
1) Put limiter plug tool (C) on limiter plug in mixture
needle hole.
(2)Screw limiter plug tool anticlockwise 2 turns into
limiter plug pushing the tool against the plug to en-
gage tool threads.
(3)Pull out limiter plug tool, with the limiter plug,
from mixture needle hole.
4) Repeat plug removal procedure for the other
mixture needle.
NOTE : If the plug is damaged and left in the
hole, use a needle or pin-shaped tool to remove
deformed plug pieces.
2. Turn Idle mixture needle (A) clockwise completely until lightly seated. Then turn it anticlockwise 3 7/8
turns. Turn Hi speed mixture needle (B) clockwise until lightly seated. Then turn it anticlockwise 1 1/8
turns.
3. Turn Idle adjust screw (D) clockwise until its head touches boss. Then turn Idle adjust screw (D)
anticlockwise 8 7/8 turns.
NOTE : The initial carburetor settings for Idle adjust screw, Idle and Hi speed mixture needles are intend-
ed to start and run the engine before final carburetor adjustments are made to conform the unit to meet
Emission Directive. Actual turns required for engine operation may vary.
(C)
1) 2) 3)
(D)
(B)
(A)

SERVICE INFORMATION
GT-222ES, SRM-222ES
F226S, T226S, C226S
8
2-3 Adjusting carburettor
SRM-222ES, T226S, C226S: Remove shield and
cut trimmer head line lengths to 180 mm.
GT-222ES, F226S: Cut trimmer head line lengths
to 130 mm with shield. (normal lengths : 145 mm
cut by shield knife.)
1. Start and warm engine for 3 minute alternating
engine speed between WOT for 50 seconds and
idle for 10 seconds.
2. Adjust Idle mixture needle (A) to reach maxi-
mum idle speed using 2.5 mm blade screwdriver.
3. Set Idle speed to 3,700 r/min by turning Idle
adjust screw (D). Engine speed should be stable at
3,700 +/- 50 r/min.
4.
Turn Idle mixture needle anticlockwise to reduce
engine idle speed 1,400 r/min to set idle speed at 2,300
r/min. The idle speed range is 2,200 - 2,400 r/min.
5. Turn Idle adjust screw (D) clockwise to increase
idle engine speed to set idle at 3,000 r/min. The
idle speed range is 2,900 to 3,100 r/min.
NOTE :
Engine speed must be allowed to stabilize a
minimum of 20 seconds after each adjustment of idle
mixture needle to assure accurate tachometer readings.
6. Adjust Hi speed mixture needle (B) to reach maximum
WOT engine speed.(max. approx. 8,000 r/min) Then turn
Hi speed mixture needle (B) anticlockwise to reduce WOT
engine speed 20 r/min (RANG : 10-30 r/min).
NOTE : Nylon line length should be 180 mm with-
out shield on SRM-222ES, T226S and C226S.
Nylon line length should be 130 mm with
shield on GT-222ES and F226S.
7. SRM-222ES(L), T226S : Stop engine and rein-
stall shield with knife, and restart engine and verify
engine idle speed ranges from 2,600 to 3,400
r/min, and expand and cut nylon line by shield
knife and WOT engine speed ranges from 9,000 to
10,000 r/min on SRM-222ES(L) and T226S, from
6,700 to 7,700 r/min on GT-222ES and F226S.
NOTE:
Nylon line length should be 145 mm with shield.
SRM-222ES(U), C226S : Stop engine and reinstall
shield for 3-tooth blade (230 mm) and the blade.
Restart engine and verify engine idle speed ranges
from 2,600 to 3,400 r/min, and WOT engine speed
ranges from 10,500 to 11,500 r/min.
Make sure the nylon line cutter does not rotate when engine is at idle. Engine should start and accelerate smoothly.
8. After adjusting carburettor, insert and secure new plug(s) (E) P005-001270 deep in the needle holes
per the Emission Directive using limiter plug tool 91020 (C).
NOTE : WOT, and idle speed in field operation may vary from final adjustment specifications due to
changing ambient conditions, fuel, and engine loads. Safe engine speed variances should be within the
WOT and Idle speed ranges listed in Section 1-2, otherwise the carburettor should be readjusted.
(C)
(E)
(A)
(D)
(C)
(B)
Nylon line lengths
Model name SRM-222ES(L) SRM-222ES(U) GT-222ES
T226S C226S F226S
Carburettor
setting 180 mm 180 mm 130 mm
Confirming 145 mm - 145 mm
(E)