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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Browse Parts for
CS-400 Chainsaws
Needle Bearing 17501200831
#6

Clutch diagram

Needle bearing

Part #17501200831

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

Piston Ring A101000160
#5

Engine/short bloc--sb1089 diagram

Piston ring

Part #A101000160

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

Cyl Cover A160000761
#4

Cylinder cover/ignition switch diagram

Cyl cover

Part #A160000761

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

Guide Plate 43301239930
#27

Chain brake diagram

Guide plate

Part #43301239930

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

Tapping Screw 4x12 (2) V202000060
Tapping screw 4x12 (2)

Part #V202000060

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

Ignition Coil A411000264
#1

Ignition/flywheel diagram

Ignition coil

Part #A411000264

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

Engine Cover Assembly (includes Items 25-26) P021009855
#24

Handle/throttle control/engine cover diagram

Engine cover assembly (includes items 25-26)

Part #P021009855

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

Screw, Choke Valve 12311438830
Screw, choke valve

Part #12311438830

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

Screwdriver-125mm 89581100130
#14

Tools diagram

Screwdriver-125mm

Part #89581100130

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

Pawl (2) A514000050
#13

Starter diagram

Pawl (2)

Part #A514000050

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.…