Echo
Gas Chainsaw

Model # CS-400 Official Echo chainsaw

Here are the diagrams and repair parts for Official Echo CS-400 chainsaw, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 212 parts  |

Piston Kit P021010581
#4

Engine/short bloc--sb1089 diagram

Piston kit

Part #P021010581

The manufacturer no longer makes this part, and there's no substitute part

Washer 12314926030
#5

Carburetor - wt-820 diagram

Washer

Part #12314926030

The manufacturer no longer makes this part, and there's no substitute part

Label-echo X502000410
#6

Labels diagram

Label-echo

Part #X502000410

The manufacturer no longer makes this part, and there's no substitute part

Spring V452000250
#15

Chain brake diagram

Spring

Part #V452000250

The manufacturer no longer makes this part, and there's no substitute part

Pipe 13201239931
#8

Handle/throttle control/engine cover diagram

Pipe

Part #13201239931

The manufacturer no longer makes this part, and there's no substitute part

L Wrench 3mm 89561203430
#11

Tools diagram

L wrench 3mm

Part #89561203430

The manufacturer no longer makes this part, and there's no substitute part

Stud, Guide Bar (2) 43301119830
#28

Handle/throttle control/engine cover diagram

Stud, guide bar (2)

Part #43301119830

The manufacturer no longer makes this part, and there's no substitute part

Label-model-cs-400 X503007391
#1

Labels diagram

Label-model-cs-400

Part #X503007391

The manufacturer no longer makes this part, and there's no substitute part

Connector, Brake C334000090
#3

Chain brake diagram

Connector, brake

Part #C334000090

The manufacturer no longer makes this part, and there's no substitute part

Label-bar & Chain X524001810
#7

Labels diagram

Label-bar & chain

Part #X524001810

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for gas chainsaws

Choose a symptom to see related chainsaw repairs.

Main causes: stale gasoline, cracked fuel lines, dirty carburetor, damaged spark plug, worn piston rings…

Main causes: bad gas, engine needs tune up, cracked fuel lines, dirty carburetor…

Main causes: cracked fuel lines, leaky carburetor seals, damaged fuel tank cap, cracked fuel tank…

Repair guides for gas chainsaws

These step-by-step repair guides will help you safely fix what’s broken on your chainsaw.

How to rebuild a chainsaw carburetor

How to rebuild a chainsaw carburetor

If your chainsaw isn't running well, a dirty carburetor could be the problem. You can take it apart, clean it and rebuil…

Repair difficulty
Time required
 15 minutes or less
How to replace chainsaw fuel lines

How to replace chainsaw fuel lines

The fuel line on a chainsaw becomes brittle over time and can crack. Replacing it doesn't require a lot of DYI experienc…

Repair difficulty
Time required
 15 minutes or less
How to replace a chainsaw carburetor

How to replace a chainsaw carburetor

If the engine won't start even though there's fuel in the chainsaw, the carburetor could be the problem. Sometimes, it's…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your chainsaws

Use the advice and tips in these articles and videos to get the most out of your chainsaw.

What are the most common replacement parts for chainsaws?

What are the most common replacement parts for chainsaws?

Learn about the most common replacement parts for chainsaws and how they can help you fix chainsaw problems.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…