Echo CS-310 Service Manual

TABLE OF CONTENTS
CS-310
1
Page Page
1 SERVICE INFORMATION
..................................... 2
1-1 Specifi 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 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 .....................................15
3-4 Inspecting ignition switch ................................16
3-5 Replacing ignition switch ................................17
3-6 Inspecting ignition coil resistance ...................18
3-7 Replacing spark plug cap and coil..................19
3-8 Replacing ignition coil .....................................19
3-9 Setting pole shoe air gaps ..............................20
3-10 Inspecting fl ywheel and key ...........................20
4 FUEL SYSTEM
...................................................22
4-1 Inspecting air fi lter ..........................................23
4-2 Inspecting fuel cap and fuel strainer...............23
4-3 Inspecting fuel tank and line ...........................24
4-4 Inspecting and replacing tank vent .................25
4-5 Replacing purge bulb .....................................27
4-6 Replacing fuel line and fuel return line ...........28
4-7 Adjusting carburetor .......................................29
4-7-1 General adjusting rules ..................................29
4-7-2 Presetting idle adjust screw, L mixture
needle and H mixture needle .........................29
4-7-3 Adjusting carburetor .......................................31
4-8 Winter plug .....................................................32
4-9 Testing carburetor ...........................................33
4-10 Inspecting crankcase pulse passage .............34
4-11 Inspecting metering lever height ....................34
4-12 Inspecting inlet needle valve ..........................35
4-13 Inspecting diaphragm .....................................36
4-14 Replacing Welch plug .....................................36
4-15 Installing carburetor ........................................37
5 CLUTCH SYSTEM
..............................................38
5-1 Inspecting clutch parts ....................................39
5-2 Replacing clutch parts ....................................40
5-3 Installing clutch assembly ...............................40
6 CHAIN BRAKE SYSTEM
....................................42
6-1 Disassembling chain brake ............................43
6-2 Assembling brake parts ..................................44
7 SAW CHAIN LUBRICATION SYSTEM
...............45
7-1 Inspecting oil cap and strainer ........................45
7-2 Inspecting oil tank vent ...................................46
7-3 Inspecting oil line ............................................47
7-4 Replacing oil line and grommet ......................48
7-5 Replacing auto-oiler assembly .......................49
8 ENGINE
............................................................... 51
8-1 Testing cylinder compression .........................52
8-2 Cleaning cooling air passages .......................52
8-3 Inspecting muffl er and exhaust port ...............53
8-4 Testing crankcase and cylinder seal ...............54
8-5 Removing engine block ..................................55
8-6 Inspecting cylinder ..........................................56
8-7 Inspecting piston and piston ring ....................57
8-8 Inspecting crankcase and crankshaft .............57
8-9 Replacing oil seal and ball bearing.................58
8-10 Installing piston and piston ring ......................59
8-11 Assembling piston into cylinder ......................60
8-12 Installing engine block ....................................61
9 REAR HANDLE AND CONTROL SYSTEM
.......62
9-1 Replacing throttle trigger ................................62
9-2 Replacing cushions ........................................64
10 GUIDE BAR MOUNTING SYSTEM
..................65
10-1 Replacing chain tensioner ..............................66
10-2 Replacing guide bar stud ................................67
11 MAINTENANCE GUIDE
.................................... 68
11-1 Troubleshooting guide ....................................68
11-2 Disassembly Chart .........................................70
11-3 Service Intervals .............................................71
INDEX
......................................................................72

Echo CS-310 Specifications

General

Engine Displacement	30.5 cc
Bar Length	14 inches
Weight	8.8 lbs
Chain Pitch	3/8 inch
Chain Gauge	0.050 inch