Model # UT20042 Official Homelite 25-cc string trimmer

Here are the diagrams and repair parts for Official Homelite UT20042 25-cc string trimmer, 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 78 parts |

#44

Short block/carburetor/crankcase diagram

Piston pin

Part #00238A

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

#28

Short block/carburetor/crankcase diagram

Rotor

Part #984531001

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

Short block/carburetor/crankcase diagram

Gasket

Part #984762001

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

#22

Short block/carburetor/crankcase diagram

Fuel cap

Part #985210001

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

#37

Short block/carburetor/crankcase diagram

Screw

Part #82563

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

#NI02

All parts diagram

Ryobi cust

Part #983000461

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

#14

Straight shaft / shield diagram

Glass shield

Part #984822001

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

Short block/carburetor/crankcase diagram

Heat dam

Part #98768A

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

#24

Short block/carburetor/crankcase diagram

Lead

Part #A07238

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

#39

Short block/carburetor/crankcase diagram

Screw

Part #82538

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…

Why won't my gas line trimmer start?

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

Why does my gas line trimmer leak gas?

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.

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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

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

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.

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Solving 3 common problems with line trimmer cutting lines

Model # UT20042 Official Homelite 25-cc string trimmer

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas line trimmers

Why does my gas line trimmer run rough?

Why won't my gas line trimmer start?

Why does my gas line trimmer leak gas?

Repair guides for gas line trimmers

How to rebuild a line trimmer carburetor

How to replace a line trimmer carburetor

How to replace a line trimmer fuel line

Articles and videos for gas line trimmers

Solving 3 common problems with line trimmer cutting lines

How to replace a line trimmer fuel line video

How to tune up a grass line trimmer video

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