Echo SRM-420ES (L): SRM-420ES (U) User Manual

SERVICE INFORMATION SRM-420ES
4
1-3 Torque limits
Descriptions Size kgf•cm N•m in•lbf
Starter Pawl M 8 60 - 90 6 - 9 50 - 80
system
Starter case M 5 30 - 45 3 - 4.5 26 - 40
Ignition Magneto rotor (Flywheel) M 8 200 - 240 20 - 24 175 - 210
system
Ignition coil M 5 50 - 70 5 - 7 45 - 60
Spark plug M 14 130 - 170 13 - 17 115 - 150
Fan cover M 5 30 - 45 3 - 4.5 26 - 40
Fuel Carburettor M 5 40 - 55 4 - 5.5 35 - 50
system
Intake bellows M 5 30 - 50 3 - 5 26 - 45
Intake insulator M 5 50 - 70 5 - 7 45 - 60
Insulator plate M 5 30 - 45 3 - 4.5 26 - 40
Fuel tank bracket M 5 50 - 70 5 - 7 45 - 60
Fuel tank M 5 50 - 70 5 - 7 45 - 60
Clutch Clutch shoe M 6 70 - 110 7 - 11 60 - 95
Engine Crankcase M 5** 70 - 110 7 - 11 60 - 95
Cylinder M 5** 70 - 110 7 - 11 60 - 95
Cylinder cover M 5 20 - 30 2 - 3 17 - 26
Stand M 5 20 - 30 2 - 3 17 - 26
Muffl er M 6 100 - 140 10 - 14 90 - 125
Muffl er cover M 5* 30 - 45 3 - 4.5 26 - 40
Muffl er stay M 5 60 - 90 6 - 9 50 - 80
Others Blade fastening nut 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
M 10 210 - 300 21 - 30 180 - 260
LM: Left hand thread.* 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 Gear case
Rewind spring
Lithium based grease or ECHO XTended Protection
TM
Starter center post
Lubricant
Oil Oil seal inner lips
Two-stroke engine oil or engine oil (SAE#30)
Drive shaft
Thread locking sealant Muffl er cover Loctite #242, ThreeBond #1324 or equivalent

Echo SRM-420ES (L): SRM-420ES (U) Specifications

General

Brand	Echo
Model	SRM-420ES (L): SRM-420ES (U)
Category	Trimmer
Language	English