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Homelite
Gas Line Trimmer

Model # UT20774 Official Homelite trimmer/brushcutter

Here are the diagrams and repair parts for Official Homelite UT20774 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 141 parts  |
Line Trimmer Blade UP04119
Line trimmer blade

Part #UP04119

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

Washer UP04129
#28

Shaft/spool/string/grass deflector diagram

Washer

Part #UP04129

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

Spark Plug UP03883
Spark plug

Part #UP03883

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

Tubing UP04715
#11

Carburetor/fuel tank diagram

Tubing

Part #UP04715

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

Cylinder Kit UP04136
#4

Engine internal diagram

Cylinder kit

Part #UP04136

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

Screw UP04256
Screw

Part #UP04256

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

Spring UP03917
Spring

Part #UP03917

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

Lock Washer UP03409
Lock washer

Part #UP03409

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

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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