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Homelite
Gas Line Trimmer

Model # UT20779 Official Homelite string trimmer/brushcutter

Here are the diagrams and repair parts for Official Homelite UT20779 string 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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ALL PARTS
Showing 10 of 132 parts  |
Decal PS00038
#14

Shaft/spool/shaft/grass deflector diagram

Decal

Part #PS00038

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

Lead A06963
Lead

Part #A06963

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

Handle A07159
Handle

Part #A07159

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

Gasket UP04308
Gasket

Part #UP04308

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

Decal UP04116
#13

Shaft/spool/string/grass deflector diagram

Decal

Part #UP04116

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

Form Screw UP03898
#21

Shaft/spool/string/grass deflector diagram

Form screw

Part #UP03898

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

Nut 81208
#24

Shaft/spool/shaft/grass deflector diagram

Nut

Part #81208

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

Svcknob Kt UP05137
Svcknob kt

Part #UP05137

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

Holding UP04100
#35

Shaft/spool/string/grass deflector diagram

Holding

Part #UP04100

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

Head String DA03174A
#23

Shaft/spool/string/grass deflector diagram

Head string

Part #DA03174A

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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Why won't my gas line trimmer start?

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

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Why does my gas line trimmer run rough?

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

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Why does my gas line trimmer leak gas?

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

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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

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…

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Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer carburetor

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 …

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Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer fuel line

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…

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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

Top 10 electric lawn and garden tools for 2023

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

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

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.…

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Grass line trimmer maintenance checklist

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…

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