TABLE OF CONTENTS
CS-2510TES
250Ts, 250TCs 1
Page Page
1 SERVICE INFORMATION.....................................2
1-1 Specifications...................................................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 Assembling starter..........................................10
2-4 Replacing starter pawl....................................12
3 IGNITION SYSTEM.............................................13
3-1 Troubleshooting guide....................................14
3-2 Testing spark..................................................15
3-3 Inspecting spark plug .....................................16
3-4 Replacing spark plug cap and coil..................16
3-5 Inspecting ignition switch................................17
3-6 Replacing ignition switch................................17
3-7 Replacing ignition coil.....................................22
3-8 Setting pole shoe air gaps..............................23
3-9 Inspecting flywheel and key ...........................23
4 FUEL SYSTEM ...................................................25
4-1 Inspecting air filter..........................................26
4-2 Inspecting fuel cap and fuel strainer...............27
4-3 Inspecting fuel tank and line...........................28
4-4 Inspecting and replacing tank vent.................29
4-5 Replacing purge bulb .....................................31
4-6 Replacing fuel line and fuel return line...........32
4-7 Adjusting carburetor.......................................34
4-7-1 General adjusting rules ..................................34
4-7-2 Presetting idle adjust screw, L mixture
needle and H mixture needle .........................34
4-7-3 Adjusting carburetor.......................................35
4-8 Testing carburetor...........................................36
4-9 Inspecting crankcase pulse passage .............37
4-10 Inspecting metering lever height ....................37
4-11 Inspecting inlet needle valve..........................38
4-12 Inspecting diaphragm and others...................39
4-13 Replacing welch plug .....................................39
4-14 Installing carburetor........................................40
5 CLUTCH SYSTEM..............................................41
5-1 Inspecting clutch parts....................................41
5-2 Replacing clutch parts....................................43
5-3 Installing clutch assembly...............................43
6 CHAIN BRAKE SYSTEM....................................44
6-1 Replacing brake lever and torsion spring.......44
6-2 Inspecting chain brake parts ..........................46
7 SAW CHAIN LUBRICATION SYSTEM...............48
7-1 Inspecting oil cap and strainer........................48
7-2 Inspecting oil tank vent...................................49
7-3 Inspecting and replacing oil line.....................50
7-4 Inspecting worm gear.....................................51
7-5 Cleaning and replacing auto-oiler assembly ..52
8 ENGINE...............................................................55
8-1 Testing cylinder compression.........................56
8-2 Cleaning cooling air passages .......................57
8-3 Inspecting muffler and exhaust port...............58
8-4 Testing crankcase and cylinder sealings........59
8-5 Removing engine block..................................60
8-6 Inspecting cylinder..........................................61
8-7 Inspecting piston and piston ring....................62
8-8 Replacing oil seal...........................................63
8-9 Inspecting crankcase and crankshaft.............64
8-10 Replacing oil seal and ball bearing.................65
8-11 Assembling crankshaft and crankcase...........66
8-12 Installing piston ring and cylinder...................67
9 HANDLE AND CONTROL SYSTEM ..................68
9-1 Replacing throttle control parts.......................69
9-2 Replacing front handle and spring..................70
9-3 Replacing rear handle and springs.................71
10 GUIDE BAR MOUNTING SYSTEM..................74
10-1 Replacing nut for fixing guide bar...................74
10-2 Replacing chain tensioner..............................75
10-3 Replacing guide bar stud................................75
11 MAINTENANCE GUIDE....................................76
11-1 Troubleshooting guide....................................76
11-2 Disassembly chart..........................................78
11-3 Service intervals.............................................79
INDEX......................................................................80
