Model # UT20643 Official Homelite line trimmer

Here are the diagrams and repair parts for Official Homelite UT20643 line 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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Showing 10 of 167 parts |

#2A

Muffler kit diagram

Piston rod

Part #A03599

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

Muffler kit diagram

Carburetor

Part #A07139

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

Split boom (r.h.) (ut15115, ut15116)

Part #GM-23611-2

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

#27

Complete starter diagram

Lawn & garden equipment screw

Part #82537

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

Head string

Part #DA04591A

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

Spool line

Part #DA-98912-E

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

#NI

Muffler kit diagram

Line trimmer primer bulb

Part #UP04802

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

#31

Muffler kit diagram

Screw

Part #82540

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

Warning decal

Part #02985

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

#32

Muffler kit diagram

Spark plug

Part #96169-S

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…

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 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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Top 10 electric lawn and garden tools for 2023

Model # UT20643 Official Homelite line trimmer

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas line trimmers

Why won't my gas line trimmer start?

Why does my gas line trimmer run rough?

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

Top 10 electric lawn and garden tools for 2023

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Grass line trimmer maintenance checklist

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