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Homelite
Gas Chainsaw

Model # Z3850BC Official Homelite chainsaw

Here are the diagrams and repair parts for Official Homelite Z3850BC chainsaw, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 139 parts  |
Bearing Case 04919
#16

Engine internal, oil pump diagram

Bearing case

Part #04919

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

Spring A97908
#2

Starter, ignition diagram

Spring

Part #A97908

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

Guide Bar PT12371OD

#NI

All parts diagram

Guide bar

Part #PT12371OD

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

Guide Bar PT18371OD

#NI

All parts diagram

Guide bar

Part #PT18371OD

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

Screw 82623
#21

Clutch/chain brake/drive case cover diagram

Screw

Part #82623

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

Deflector 07396A
#6

Carburetor, muffler, air filter diagram

Deflector

Part #07396A

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

Harness A07602
#13

Starter, ignition diagram

Harness

Part #A07602

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

Crankcase 04909
#20

Engine internal, oil pump diagram

Crankcase

Part #04909

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

Bll Brng/cse A04931
#15

Engine internal, oil pump diagram

Bll brng/cse

Part #A04931

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

Carburetor Kit A08674
#8

Carburetor, muffler, air filter diagram

Carburetor kit

Part #A08674

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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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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Why does my chainsaw run roughly?

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

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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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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…

Read more
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
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

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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