Table Of Contents - Yamabiko ECHO PB-2520 Service Manual

PB-2520
EB252
1 SERVICE INFORMATION .....................................2
1-1 Speci cations ...................................................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 STARTER SYSTEM ..............................................7
2-1 Disassembling starter assembly .......................8
2-2 Replacing starter rope ......................................9
2-3 Installing rewind spring ...................................10
2-4 Assembling starter .......................................... 11
2-5 Replacing starter pawl ....................................12
3 BLOWER SYSTEM .............................................13
3-1 Inspecting fan and fan case ...........................14
3-2 Disassembling and assembling
fan and fan case .............................................14
4 IGNITION SYSTEM .............................................17
4-1 Troubleshooting guide ....................................18
4-2 Testing spark ..................................................19
4-3 Inspecting spark plug .....................................19
4-4 Replacing spark plug cap and coil..................20
4-5 Inspecting ignition module ..............................21
4-6 Replacing ignition module ..............................22
4-7 Setting pole shoe air gaps ..............................24
4-8 Inspecting ignition switch ................................24
4-9 Replacing ignition switch ................................25
4-10 Inspecting ywheel magnetic force ................26
4-11 Replacing ywheel and key ............................26
5 HANDLE AND CONTROL SYSTEM ..................28
5-1 Disassembling and assembling
handle and control parts .................................29

TABLE OF CONTENTS

Page
6 FUEL SYSTEM ...................................................30
6-1 Inspecting air lter ..........................................31
6-2 Inspecting fuel cap and fuel strainer...............31
6-3 Inspecting fuel tank and line ...........................32
6-4 Inspecting and replacing tank vent .................33
6-5 Replacing fuel line, fuel return line,
tank vent line and grommet ............................35
6-6 Adjusting carburetor .......................................36
6-6-1 General adjusting rules ..................................36
6-6-2 Initial setting Throttle adjust screw,
L mixture needle and H mixture needle ..........37
6-6-3 Adjusting carburetor .......................................37
6-6-4 Inserting limiter plugs .....................................38
6-7 Testing carburetor ...........................................39
6-8 Inspecting crankcase pulse passage .............40
6-9 Inspecting metering lever height ....................40
6-10 Inspecting inlet needle valve ..........................41
6-11 Inspecting diaphragm .....................................41
6-12 Installing carburetor ........................................42
7 ENGINE ...............................................................43
7-1 Testing cylinder compression .........................44
7-2 Cleaning cooling air passages .......................44
7-3 Inspecting muf er and exhaust port ...............45
7-4 Testing crankcase and cylinder sealings ........46
7-5 Replacing oil seal ...........................................47
7-6 Inspecting cylinder ..........................................47
7-7 Inspecting piston and piston ring ....................48
7-8 Disassembling crankcase ...............................48
7-9 Replacing ball bearings ..................................49
7-10 Assembling crankshaft and crankcase ...........50
7-11 Installing piston ...............................................50
7-12 Installing piston ring and cylinder ...................51
7-13 Assembling engine assembly and
other parts ......................................................52
8 MAINTENANCE GUIDE ......................................53
8-1 Disassembly chart ..........................................53
8-2 Troubleshooting guide ....................................54
8-3 Service intervals .............................................56
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