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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  |
Screw UP04131
#2

Carburetor/fuel tank diagram

Screw

Part #UP04131

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

Screw UP04248
#2

Muffler/air cleaner diagram

Screw

Part #UP04248

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

Blade D98717C
#32

Shaft/spool/string/grass deflector diagram

Blade

Part #D98717C

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

Compression B06713
Compression

Part #B06713

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

Starter Assembly UP02962
Starter assembly

Part #UP02962

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

Housing UP02965
Housing

Part #UP02965

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

Piston Rod UP00768
#2

Engine internal diagram

Piston rod

Part #UP00768

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

Bolt UP04295
#12

Engine internal diagram

Bolt

Part #UP04295

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

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

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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 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 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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Solving 3 common problems with line trimmer cutting lines

Solving 3 common problems with line trimmer cutting lines

Follow these tips to prevent the cutting line on your grass line trimmer from breaking or feeding out too much or too li…

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How to replace a line trimmer fuel line video

How to replace a line trimmer fuel line video

Follow the steps in this video to replace a leaking fuel line in a line trimmer.…

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How to tune up a grass line trimmer video

How to tune up a grass line trimmer video

Tune of your grass line trimmer, following the steps in this video.…

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