Gas Line Trimmer

Model # UT20042A Official Homelite 25-cc string trimmer

Here are the diagrams and repair parts for Official Homelite UT20042A 25-cc string trimmer, as well as links to manuals and error code tables, if available.

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Browse Parts for
UT20042A Line Trimmers
Rotor 984531001
#28

Short block/carburetor/crankcase diagram

Rotor

Part #984531001

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

Spring A98773A
#30

Short block/carburetor/crankcase diagram

Spring

Part #A98773A

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

Ring Clip 6969102
#45

Short block/carburetor/crankcase diagram

Ring clip

Part #6969102

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

Heat Dam 98768A
#6

Short block/carburetor/crankcase diagram

Heat dam

Part #98768A

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

Ignition Module 4306401
#26A

Short block/carburetor/crankcase diagram

Ignition module

Part #4306401

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

Piston Ring PS04468
#48

Short block/carburetor/crankcase diagram

Piston ring

Part #PS04468

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

Str Rope 42 9789902
#32

Short block/carburetor/crankcase diagram

Str rope 42

Part #9789902

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

Washer PS84065
#21

Short block/carburetor/crankcase diagram

Washer

Part #PS84065

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

Air Box Cover PS02156
#10

Short block/carburetor/crankcase diagram

Air box cover

Part #PS02156

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

Start Grip PS06114
#33

Short block/carburetor/crankcase diagram

Start grip

Part #PS06114

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.

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

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

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

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.

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…

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 …

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…

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.

Top 10 electric lawn and garden tools for 2023

Top 10 electric lawn and 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.…

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…