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Homelite
Gas Line Trimmer

Model # UT20773 Official Homelite trimmer/brushcutter

Here are the diagrams and repair parts for Official Homelite UT20773 trimmer/brushcutter, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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PART LIST
Showing 10 of 141 parts  |
Guard
#13

Engine internal diagram

Guard

Part #UP04099

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

Gasket
#11

Engine internal diagram

Gasket

Part #UP04335

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

Hex Head Cap
#3

Shaft/spool/string/grass deflector diagram

Hex head cap

Part #UP04158

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

Housing
Housing

Part #UP02965

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

Air Baffle
Air baffle

Part #UP03013

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

Screw
#8

Muffler/air cleaner diagram

Screw

Part #UP04082

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

Clutch
Clutch

Part #UP04103

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

Blade
#27

Shaft/spool/string/grass deflector diagram

Blade

Part #D98717C

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

Screw
#14

Engine internal diagram

Screw

Part #UP03897

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

Spring
#7

Muffler/air cleaner diagram

Spring

Part #UP04716

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

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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April 19, 2023

Why does my gas line trimmer run rough?

By Lyle Weischwill

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

Read more
April 19, 2023

Why won't my gas line trimmer start?

By Lyle Weischwill

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

Read more
April 19, 2023

Why does my gas line trimmer leak gas?

By Lyle Weischwill

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

Read more

Repair guides for gas line trimmers

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

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How to rebuild a line trimmer carburetor
October 01, 2013
By Lyle Weischwill

How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer carburetor
October 01, 2013
By Lyle Weischwill

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer fuel line
October 01, 2013
By Lyle Weischwill

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours…

Read more
Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas line trimmers

Use the advice and tips in these articles and videos to get the most out of your grass line trimmer.

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Top 10 electric lawn and garden tools for 2023
February 11, 2023
By Lyle Weischwill

Top 10 electric lawn and garden tools for 2023

Learn about the top 10 must-have electric lawn & garden tools for 2023…

Read more
How to enjoy all the online benefits we offer on our Sears PartsDirect website
August 30, 2022
By Lyle Weischwill

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Read more
Grass line trimmer maintenance checklist
March 01, 2016
By Lyle Weischwill

Grass line trimmer maintenance checklist

Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this help…

Read more

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