Gas Line Trimmer

Model # ST-155 Official Homelite trimmer

Here are the diagrams and repair parts for Official Homelite ST-155 trimmer, as well as links to manuals and error code tables, if available.

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Browse Parts for
ST-155 Line Trimmers
Carburetor A-00047-C
#27

Figure 1 - engine diagram

Carburetor

Part #A-00047-C

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

Lead Elctrcl A-00681
#79

Figure 1 - engine diagram

Lead elctrcl

Part #A-00681

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

Filter 98913
#42

Figure 1 - engine diagram

Filter

Part #98913

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

Heat Dam 98768
#24

Figure 1 - engine diagram

Heat dam

Part #98768

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

Filter Box A-01440
#28

Figure 1 - engine diagram

Filter box

Part #A-01440

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

Washer 84006
#16

Figure 2 diagram

Washer

Part #84006

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

Air Filter D-98760
#31

Figure 1 - engine diagram

Air filter

Part #D-98760

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

Ring 98799
#64

Figure 1 - engine diagram

Ring

Part #98799

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

Nut 97574
#86

Figure 1 - engine diagram

Nut

Part #97574

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

Carbrtor Kit 17789

#NI

All parts diagram

Carbrtor kit

Part #17789

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

Learn about the top 10 must-have electric lawn & garden tools for 2023…

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…