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Homelite
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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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 78 parts  |
Line Trimmer Spool Assembly 308044002

#NI

All parts diagram

Line trimmer spool assembly

Part #308044002

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

Washer PS84065
#21

Short block/carburetor/crankcase diagram

Washer

Part #PS84065

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

Outlet Tube 984757001
#51

Short block/carburetor/crankcase diagram

Outlet tube

Part #984757001

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

Easy Decal 983839001

#NI03

All parts diagram

Easy decal

Part #983839001

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

Screw 10-2 PS04673
#3

Straight shaft / shield diagram

Screw 10-2

Part #PS04673

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

Screw 82546
#11

Straight shaft / shield diagram

Screw

Part #82546

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

Fuel Cap 985210001
#22

Short block/carburetor/crankcase diagram

Fuel cap

Part #985210001

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

Catalytic 984748001
#41A

Short block/carburetor/crankcase diagram

Catalytic

Part #984748001

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

Lawn & Garden Equipment Screw 82513
#13

Short block/carburetor/crankcase diagram

Lawn & garden equipment screw

Part #82513

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 …

Read more
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

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

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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