Echo cs-520 is a powerful and versatile chainsaw that is perfect for a variety of tasks, from felling trees to cutting firewood. It features a 50.1cc engine that provides plenty of power for even the most demanding jobs. The cs-520 also has a number of features that make it easy to use, including an automatic oiler, a chain brake, and an adjustable handle.
Echo cs-520 is a powerful and versatile chainsaw that is perfect for a variety of tasks, from felling trees to cutting firewood. It features a 50.1cc engine that provides plenty of power for even the most demanding jobs. The cs-520 also has a number of features that make it easy to use, including an automatic oiler, a chain brake, and an adjustable handle.
OPTIONAL ATTACHMENTS & ACCESSORIES
Accessories
103942147 CS Carry Bag
89850308032 Bar & Chain Cover - 17"
89850308033 Bar & Chain Cover - 20"
99988800207 CS Removable Nose Case
99988800308 CS Lanyard Strap w_Ring
99988801205 CS Fixed Nose Case
Guide Bars
16A0MD3366 Guide Bar - 16" (.050" Ga) -- Micro-Lite Pro
18A0MD3372 Guide Bar - 18" (.050" Ga) -- Micro-Lite Pro
20A0MD3378 Guide Bar - 20" (.050: Ga) -- Micro-Lite Pro
Sawing Chains
95VP66G Sawing Chain - 16" (.050" Ga) -- Micro-Lite
95VP72G Sawing Chain - 18" (.050" Ga) -- Micro-Lite
95VP78G Sawing Chain - 20" (.050" Ga) -- Micro-Lite
PARTS CATALOG
CS-520 Chain Saw
50.1cc
MODEL:SERIAL NUMBERS
CS-520: S/N: C09312001001 - C09312999999
ECHO, INCORPORATED
400 Oakwood Road Lake Zurich, Illinois 60047 USA
WWW.ECHO-USA.COM
99922204144
©2008 ECHO Incorporated, RePower is Registered Trademark of ECHO Incorporated. All Rights Reserved REVISED 03/19/08
Click Any Diagram Desciption Below To Veiw That Diagram.
CS-520 S/N: C09312001001 - C09312999999
Cylinder Cover, Intake, Fuel System, Ignition Switch...................................................................................................4
Carburetor -- WT-594........................................................................................................................................................6
Exhaust.............................................................................................................................................................................8
Starter.............................................................................................................................................................................10
Ignition............................................................................................................................................................................12
Chain Brake....................................................................................................................................................................14
Guide Bar, Sawing Chain, Kick Guard.........................................................................................................................16
Clutch.............................................................................................................................................................................18
Handles, Throttle Control..............................................................................................................................................20
Auto-Oiler, Oil Tank........................................................................................................................................................22
Engine, Short Block -- SB1080, Engine Cover............................................................................................................24
Labels.............................................................................................................................................................................26
Tools...............................................................................................................................................................................28
Part Number Index.........................................................................................................................................................30
Part Description Index..................................................................................................................................................31
99922204144 - 2 - REVISED 03/19/08
Table of Contents Part Number Index
Table of Contents
- 3 -
This Page Intentionally Left Blank
REMARKSDESCRIPTIONQTYPART NUMBERITEM
LID, CLEANER1P0210071501
KNOB, AIR CLEANER LID1A2350000002
PLUG1130338324303
COVER, CYLINDER1A1600002024
SCREW 53163890383305
DEFLECTOR, HEAT1101520354306
GASKET, INTAKE1130016399307
ADAPTER, INTAKE1130510399328
SCREW 5X122900238050129
INCLUDES ITEMS 9-11INSULATOR KIT11300003833110
CUSHION1V42000113011
NUT21300203333012
GASKET, INTAKE11300103833013
See Carburetor Diagram For Additional InformationCARBURETOR1------------------14
PIPE, IMPULSE11301103833015
BRACKET, AIR CLEANER11304053833216
FILTER, AIR11303103833117
ELBOW, CARBURETOR1A20400000418
SCREW 5X5029001620505019
CUSHION11304303833020
BRACKET11638103893321
ROD, THROTTLE1C45400004122
GROMMET11788101453423
ROD, CHOKE1A24100010024
SWITCH, IGNITION11634003833025
TERMINAL, SWITCH11634133893026
GROMMET11321150492027
PIPE, FUEL - SPIRAL11320103833128
CLIP11320132663029
FILTER, FUEL11312051983030
INCLUDES ITEMS 30-31CAP ASY11310043793131
CONNECTOR, CAP1A36500005032
O-RING 2219007200002233
99922204144 - 5 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Cylinder Cover, Intake, Fuel System, Ignition Switch
REMARKSDESCRIPTIONQTYPART NUMBERITEM
CARBURETOR -- WT-5941A0210002200
SCREW, METERING DIAPHRAGM
COVER
4123130029601
COVER, METERING DIAPHRAGM1123142039302
BODY, CARBURETOR
1
1------------------3
SHAFT, CHOKE1P0030001504
WASHER1123149260305
LEVER, FAST IDLE1P0030001606
SPRING, CHOKE RETURN1P0030001407
SCREW, CHOKE VALVE1123114039308
VALVE CHOKE1P0030002309
CLIP, CHOKE SHAFT11231271503010
CAP, MIXTURE LIMITER2P00300001011
NEEDLE, HIGH SPEED21231200366112
SHAFT, THROTTLE1P00300048013
SPRING, THROTTLE RETURN11231133753014
SCREW, THROTTLE VALVE11231140393015
VALVE, THROTTLE11231161053016
CLIP, THROTTLE SHAFT11231271503017
LEVER, THROTTLE1P00300013018
SCREW, THROTTLE LEVER11231140393019
SCREW, IDLE ADJUST11231340426020
SPRING, IDLE ADJUST11231330426021
PLUG, FRICTION11231781503022
COVER, FUEL PUMP11231243833023
SCREW, PUMP COVER11231100393024
SCREW, METERING LEVER PIN11231390393025
INCLUDES ITEMS 27-36REPAIR KIT1P00300025026
DIAPHRAGM, METERING1------------------27
GASKET, METERING DIAPHRAGM1------------------28
LEVER, METERING1------------------29
PIN, METERING LEVER1------------------30
PLUG, WELCH1------------------31
SPRING, METERING LEVER1------------------32
VALVE, INLET NEEDLE1------------------33
SCREEN, INLET1------------------34
DIAPHRAGM, FUEL PUMP1------------------35
GASKET, FUEL PUMP1------------------36
INCLUDES ITEMS 38-41GASKET/DIAPHRAGM KIT1P00300024037
DIAPHRAGM, METERING1------------------38
GASKET, METERING DIAPHRAGM1------------------39
DIAPHRAGM, FUEL PUMP1------------------40
GASKET, FUEL PUMP1------------------41
Footnotes
1: NOT AVAIABLE SEPARATELY
99922204144 - 7 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Carburetor -- WT-594
REMARKSDESCRIPTIONQTYPART NUMBERITEM
INCLUDES ITEMS 2-5MUFFLER ASY1P0210065911
GASKET, EXHAUST1145510354312
SCREEN1145884393303
GUIDE, EXHAUST1A3030000504
SCREW 4X82900250040085
SCREW 4X61900105040066
PLATE1145711606317
SCREW 5X142900105050148
99922204144 - 9 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Exhaust
REMARKSDESCRIPTIONQTYPART NUMBERITEM
SCREW 5X184900238050181
INCLUDES ITEMS 3-12STARTER ASY1177200393352
LABEL - ECHO1X5020000103
GUIDE, ROPE1177227379304
SCREW 3X141900296030145
GRIP, STARTER1177228354306
SPRING, REWIND1177220354307
PLATE, STARTER1177221383308
DRUM, STARTER1177215383309
REPOWER BULK OPTION: 99944445000ROPE, STARTER - 3.5X960mm11772263833010
WASHER11772140283011
SCREW 5X1219002380501212
COVER, FAN1A17200006213
SCREW 5X142V20300009014
WASHER 529006030000515
PAWL, STARTER21772181983016
SPACER21772470463017
SPRING, RETURN21772343543018
99922204144 - 11 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Starter
REMARKSDESCRIPTIONQTYPART NUMBERITEM
COIL, IGNITION1A4110000311
SCREW 4X302900162040302
LEAD, GROUND1162010383323
BOOT, CONNECTOR1C4830000004
SCREW 4X61900220040065
GROMMET1V1350000106
CAP, SPARK PLUG1A4270000127
TERMINAL, SPARK PLUG CAP1A4260000108
SPARK PLUG -- BPM-7A1159010106309
CANADA MODELSSPARK PLUG -- BPMR-8Y1A42500000010
FLYWHEEL1A40900003011
NUT 819005150000812
WOODRUFF KEY11001423083013
99922204144 - 13 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Ignition
REMARKSDESCRIPTIONQTYPART NUMBERITEM
INCLUDES ITEMS 2-26CHAIN BRAKE ASY1433100390371
INCLUDES ITEMS 3-10BRAKE LEVER ASY1433201390312
NUT 42900500000043
WEIGHT, BRAKE1433171393304
SCREW 4X182900238040185
SCREW 5X32191318050326
SPACER2433167391307
SPRING1433114383318
FLANGE NUT 51900562500059
PIN 3X2419003303024010
INCLUDES ITEMS 12-16SPROCKET GUARD ASY1P02100128011
GUARD, SPROCKET14330053933412
NOT REQUIREDPLUG1V16200002013
PLATE, SPROCKET GUARD1C30500000114
SCREW 3X619002200300615
SCREW 4X1019002530401016
ADJUSTER, BRAKE14331423543017
WASHER1V30400009018
BAND, BRAKE1C32800006019
SPRING PIN 2.5X1219003422501220
COVER, BRAKE14333103933021
SCREW 4X1019002530401022
STOPPER, BRAKE14332093543023
SPRING, BRAKE14331223543024
COLLAR 5.2X12X1414331153833025
LEVER, BRAKE14332083543126
SPRING PIN 4X8.819003304008827
BOLT 51V20300011028
TENSIONER, CHAIN1C30900003029
COLLAR1V35500027030
GEAR, BEVEL1V65100001131
GEAR, BEVEL1V65100000132
FLANGE NUT 824330191233033
PLATE, GUIDE - INNER14330133543134
SCREW 4X619002200400635
INCLUDES ITEM 32CHAIN CATCHER KIT14330001983136
SCREW 5X1819002200501837
SPIKED BUMPER KIT18802003833038
SCREW 5X1229001050501239
99922204144 - 15 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Chain Brake
REMARKSDESCRIPTIONQTYPART NUMBERITEM
KICK GUARD KIT128932011
GAUGE: .050"GUIDE BAR - 16" -- MicroLite Pro116A0MD33662
GAUGE: .050"GUIDE BAR - 18" -- MicroLite Pro118A0MD33722
GAUGE: .050"GUIDE BAR - 20" -- Micro-Lite Pro120A0MD33782
GAUGE: .050" / PITCH: .325"SAWING CHAIN - 16" -- Micro-Lite195VP66G3
GAUGE: .050" / PITCH: .325"SAWING CHAIN - 18" -- Micro-Lite195VP72G3
GAUGE: .050" / PITCH: .325"SAWING CHAIN - 20" -- Micro-Lite195VP78G3
99922204144 - 17 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Guide Bar, Sawing Chain, Kick Guard
REMARKSDESCRIPTIONQTYPART NUMBERITEM
INCLUDES ITEMS 2-5CLUTCH ASY1P0210070701
HUB, CLUTCH1A5520000502
CLUTCH SHOE SET1P0210070503
SPRING, CLUTCH3V4510005004
PLATE, CLUTCH1A5510000605
DRUM, CLUTCH1A5560000206
BEARING, NEEDLE1V5570000107
SPROCKET, RIM1175114125308
PLATE, CLUTCH1A5510000009
99922204144 - 19 - REVISED 03/19/08
Table of Contents Part Number Index
CS-520 Chain Saw Clutch
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Echo cs-520 is a powerful and versatile chainsaw that is perfect for a variety of tasks, from felling trees to cutting firewood. It features a 50.1cc engine that provides plenty of power for even the most demanding jobs. The cs-520 also has a number of features that make it easy to use, including an automatic oiler, a chain brake, and an adjustable handle.
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