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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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DCS540-21 Chainsaws
#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
#3
Cylinder, piston and accessories diagram
Piston ring
Part #033-132-020
The manufacturer no longer makes this part, and there's no substitute part
#4
Cylinder, piston and accessories diagram
Piston pin
Part #001-132-010
The manufacturer no longer makes this part, and there's no substitute part
#13
Hood, air filter, muffler diagram
Plug (carb. heating)
Part #965-404-230
The manufacturer no longer makes this part, and there's no substitute part
#16
Hood, air filter, muffler diagram
Intermediate flange
Part #020-131-041
The manufacturer no longer makes this part, and there's no substitute part
#4A
Crankcase diagram
Ballbearing
Part #960-102-159
The manufacturer no longer makes this part, and there's no substitute part
#11
Ignition electronics, starter diagram
Air duct
Part #020-112-010
The manufacturer no longer makes this part, and there's no substitute part
#11B
Oil pump diagram
Rim sprocket (3/8" z=7)
Part #026-224-010
The manufacturer no longer makes this part, and there's no substitute part
#29
Carburetor diagram
Screen
Part #021-151-180
The manufacturer no longer makes this part, and there's no substitute part
#5
Cylinder, piston and accessories diagram
Spring ring (2)
Part #020-132-050
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
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
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
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.
Learn about the most common replacement parts for chainsaws and how they can help you fix chainsaw problems.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…