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
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

Power Head 984772004
#0B

Straight shaft / shield diagram

Power head

Part #984772004

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

Cut-off Bl 07129
#10

Straight shaft / shield diagram

Cut-off bl

Part #07129

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

Power Head 984772003
#0A

Straight shaft / shield diagram

Power head

Part #984772003

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

Screw 82543
#36

Short block/carburetor/crankcase diagram

Screw

Part #82543

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

Short Block 985394001
#1

Short block/carburetor/crankcase diagram

Short block

Part #985394001

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

Piston Pin 00238A
#44

Short block/carburetor/crankcase diagram

Piston pin

Part #00238A

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

Line Trimmer Screw PS02435
#9

Straight shaft / shield diagram

Line trimmer screw

Part #PS02435

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

Line Trimmer Air Filter 98760
#8

Short block/carburetor/crankcase diagram

Line trimmer air filter

Part #98760

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

Piston 3081102
#49

Short block/carburetor/crankcase diagram

Piston

Part #3081102

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, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

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

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.

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.…

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…

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.…