3
SRM-420ES, SRM-420TES
T410S, B410S
T410TS, B410TS
SERVICE INFORMATION
3
1-1 Specifi cations (continued)
Model
SRM-420TES (L) SRM-420TES (U)
T410TS B410TS
Dimensions*
1
Length mm (in) 1852 (72.8)
Width mm (in) 355 (14.0) 700 (27.6)
Heigh mm (in) 312 (12.3) 620 (24.4)
Dry weight*
2
kg (lb) 8.0 (17.6) 8.7 (19.2)
Engine Type YAMABIKO, air-cooled, two-stroke, single cylinder
Rotation Counterclockwise as viewed from the output end
Displacement cm
3
(in
3
) 41.5 (2.532)
Bore mm (in) 40.0 (1.575)
Stroke mm (in) 33.0 (1.299)
Compression ratio 6.7
Carburetor Type Rotary type : Diaphragm, horizontal-draft, with purge bulb
Model WT-1046
WT-1046
WT-1170
Venturi size-Throttle bore mm (in) 12.7 - 14.3 (0.50 - 0.56)
Ignition Type CDI (Capacitor discharge ignition) system, Digital magneto
Spark plug BPMR8Y
Exhaust Muffl er type Spark arrester muffl er with catalyst
Starter Type ES-start (effortless) / Soft Start
Rope diameter x length mm (in) 3.8 x 910 (0.15 x 35.9)
Fuel*
3
Type*
4
Mixed two-stroke fuel
Mixture ratio 50 : 1 (2%)
Gasoline Minimum 89 octane
Two-stroke engine oil ISO-L-EGD (ISO/CD13738), JASO FC/FD
Tank capacity Full tank capacity: 0.69 (23.3)
L (U.S.fl .oz.) Usable capacity: 0.60 (20.3)
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 Solid type with serration (10-tooth)
Diameter - Length mm (in) 8.0 - 1588 (0.31 - 62.52)
Housing OD - ID mm (in) 28.0 - 24.0 (1.10 - 0.94)
(Main pipe)
Length mm (in) 1537 (60.5)
Gear case Reduction ratio 2.08
Gear tooth Spiral bevel gear
Lubrication Lithium based grease
Cutter Type Nylon line cutter B6
Arbor 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.
*
1
Without Nylon line head *
2
Without Nylon line head and Shield
*3
Refer to Operator’s manual
*
4
Premixed alkylate fuel for 2-stroke can be used
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