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Makita
Gas Chainsaw

Model # DCS540-21 Official Makita chainsaw

Here are the diagrams and repair parts for Official Makita DCS540-21 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 194 parts  |
Chain 18" 523-102-064
#401

Cylinder, piston and accessories diagram

Chain 18"

Part #523-102-064

Replaced by #72V064G

?
Manufacturer substitution
This part replaces 523-102-064. Substitute parts can look different from the original.
$31.76
In Stock
Packing Ring 963-232-045
#17

Fuel tank, tubular grip diagram

Packing ring

Part #963-232-045

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

Rubber Buffer 965-403-490
#3

Fuel tank, tubular grip diagram

Rubber buffer

Part #965-403-490

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

Bottom 027-118-040
#8

Hood, air filter, muffler diagram

Bottom

Part #027-118-040

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

Spike Bar Assembly 020-250-020
#26

Crankcase diagram

Spike bar assembly

Part #020-250-020

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

Cable Drum 027-162-070
#8

Ignition electronics, starter diagram

Cable drum

Part #027-162-070

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

Guidepiece 020-118-030
#22

Hood, air filter, muffler diagram

Guidepiece

Part #020-118-030

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

Tubular Handle Assembly 957-310-027
#1

Fuel tank, tubular grip diagram

Tubular handle assembly

Part #957-310-027

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

Spring 020-117-273
#24

Fuel tank, tubular grip diagram

Spring

Part #020-117-273

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

Needlecage 962-211-030
#6

Crankcase diagram

Needlecage

Part #962-211-030

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.

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What should I do if my chainsaw leaks gas?

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

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Why does my chainsaw run roughly?

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

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Why won't my chainsaw start?

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

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Repair guides for gas chainsaws

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

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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…

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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…

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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…

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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.

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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.…

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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.…

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