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Homelite
Gas Line Trimmer

Model # UT20777 Official Homelite string trimmer/brushcutter

Here are the diagrams and repair parts for Official Homelite UT20777 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  |
Short Block UP02995
Short block

Part #UP02995

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

Cover UP00019
#10

Engine internal diagram

Cover

Part #UP00019

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

Hex Nut, Left UP04127
#34

Shaft/spool/string/grass deflector diagram

Hex nut, left

Part #UP04127

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

Guardblade UP05070
#30

Shaft/spool/string/grass deflector diagram

Guardblade

Part #UP05070

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

Handle UP03114
Handle

Part #UP03114

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

Gasket UP03857
#5

Engine internal diagram

Gasket

Part #UP03857

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

Screw UP03406
Screw

Part #UP03406

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

Washer 98929A
Washer

Part #98929A

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

Lead UP03174
Lead

Part #UP03174

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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