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Homelite
Gas Chainsaw

Model # UT10870 Official Homelite chainsaw

Here are the diagrams and repair parts for Official Homelite UT10870 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 140 parts  |
Spring Clip 08939
Spring clip

Part #08939

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

Guide Bar (power Tip) 18" (3/8") PT18371-MD

#NI04

All parts diagram

Guide bar (power tip) 18" (3/8")

Part #PT18371-MD

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

Tubing, Ru 0745499

#NI10

All parts diagram

Tubing, ru

Part #0745499

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

Lawn & Garden Equipment Screw 06844
Lawn & garden equipment screw

Part #06844

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

Ring 58409
#7

Handles diagram

Ring

Part #58409

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

Start Kit UP06749A
#1

Starter-ignition diagram

Start kit

Part #UP06749A

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

Gasket 98339
Gasket

Part #98339

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

Guide Plate 07405A
Guide plate

Part #07405A

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

Carburetor Spacer Seal 06873
#14

Carb./muffler/air filter diagram

Carburetor spacer seal

Part #06873

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…

Read more
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…

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

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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