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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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For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

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ALL PARTS
Showing 10 of 140 parts  |
Speed Nut 07598
#20

Engine housing/fuel tank/oil tank diagram

Speed nut

Part #07598

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

Start Pulley 9789901
#7

Starter-ignition diagram

Start pulley

Part #9789901

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

Chain Catc UP05634A
Chain catc

Part #UP05634A

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

Silastic PS24823

#NI09

All parts diagram

Silastic

Part #PS24823

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

Chainsaw Fuel Filter PS03380
#17

Engine housing/fuel tank/oil tank diagram

Chainsaw fuel filter

Part #PS03380

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

Lawn & Garden Equipment Screw 82537
#10

Handles diagram

Lawn & garden equipment screw

Part #82537

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

Grease 18453

#NI13

All parts diagram

Grease

Part #18453

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

Fuel Line 0745416
#18

Carb./muffler/air filter diagram

Fuel line

Part #0745416

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

Retaining Ring 69599
Retaining ring

Part #69599

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

Throttle Trigger PS0396801
#2

Handles diagram

Throttle trigger

Part #PS0396801

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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