TABLE OF CONTENTS
PB-2520
EB252 1
Page Page
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 Àywheel magnetic force ................26
4-11 Replacing Àywheel and key............................26
5 HANDLE AND CONTROL SYSTEM ..................28
5-1 Disassembling and assembling
handle and control parts.................................29
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 mufÀer 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
