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  Homelite ST155 (UT-20539-A) String Trimmer Parts
Homelite String Trimmer Replacement  For Model ST155 (UT-20539-A)

Homelite String Trimmer Replacement Parts For Model ST155 (UT-20539-A)

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Popular Parts for Homelite ST155 (UT-20539-A)

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Boom & Head
Engine & Peripherals
Showing All Parts
Boom & Head
Homelite ST155 (UT-20539-A) String Trimmer Boom & Head Diagram
 Fig #
1
Wing Nut Obsolete - Not Available
 $2.99

Part Number:93992

Discontinued

Discontinued

Note: Torque Specs: 5-25 In/Lbs; .6-2.8 Nm
 $2.99
Discontinued
2
Screw-8-16 X 3/4"
 $3.99

Part Number:82536

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
3
Flex Shaft Obsolete - Not Available
 $4.99

Part Number:986117001

Discontinued

Discontinued
 $4.99
Discontinued
5
Handle Grip Assembly Obsolete - Not Available
 $6.91

Part Number:A00879

Discontinued

Discontinued
 $6.91
Discontinued
7
Spool & String (Dual Line) Obsolete - Not Available
 $2.99

Part Number:DA98912B

Discontinued

Discontinued
 $2.99
Discontinued
8
Cable- Throttle Obsolete - Not Available
 $6.50

Part Number:A03006

Discontinued

Discontinued
 $6.50
Discontinued
9
Line- Replacement (.080 Dia.) (100 Ft.) Obsolete - Not Available
 $2.99

Part Number:DA97952B

Discontinued

Discontinued
 $2.99
Discontinued
10
Screw- Hex Cap
 $3.99

Part Number:80295

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
13
Decal-Warning Obsolete - Not Available
 $2.99

Part Number:983751001

Discontinued

Discontinued
 $2.99
Discontinued
14
Clamp Obsolete - Not Available
 $2.99

Part Number:07928

Discontinued

Discontinued
 $2.99
Discontinued
16
Washer- Flat (1/4") Obsolete - Not Available
 $2.99

Part Number:84006

Discontinued

Discontinued
 $2.99
Discontinued
17
Grass Deflector Assembly
 $3.99

Part Number:T308744001

In Stock

In Stock

Note: 11-28-16 (Rev:02)
 $3.99
In Stock
 $3.99
18
Blade- Cut-Off (Models 145 & 155) Obsolete - Not Available
 $2.99

Part Number:A03834

Discontinued

Discontinued
 $2.99
Discontinued
21
Housing and Eyelet Obsolete - Not Available
 $9.65

Part Number:099068001005

Discontinued

Discontinued
 $9.65
Discontinued
22
Spring
 $4.99

Part Number:06713

In Stock

In Stock

Note: 9-17-19 (Rev:02)
 $4.99
In Stock
 $4.99
23
Screw- Hex Sems (10-24 X 3/8") Obsolete - Not Available
 $2.99

Part Number:PS05243

Discontinued

Discontinued

Note: Torque Specs: 15-25 In/Lbs; 1.7-2.8 Nm
 $2.99
Discontinued
24
Right Hand Thread Spool Retainer Obsolete - Not Available
 $2.99

Part Number:308042002

Discontinued

Discontinued

Note: 11-28-16 (Rev:02)
 $2.99
Discontinued
25
Handle Bar Obsolete - Not Available
 $35.38

Part Number:A97709A

Discontinued

Discontinued
 $35.38
Discontinued
26
Grip Obsolete - Not Available
 $3.78

Part Number:94474B

Discontinued

Discontinued
 $3.78
Discontinued
27
Screw (1/4-20 X 1 1/2") Obsolete - Not Available
 $2.99

Part Number:88071

Discontinued

Discontinued
 $2.99
Discontinued
28
Screw (1/4-20 X 1") Obsolete - Not Available
 $2.99

Part Number:88078

Discontinued

Discontinued
 $2.99
Discontinued
29
Handle Bar Clamp Obsolete - Not Available
 $3.99

Part Number:099075001007

Discontinued

Discontinued

Note: Quantity of 2 needed for whole clamp
 $3.99
Discontinued
30
Washer (1/4")
 $3.99

Part Number:83061

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
31
Hex Nut Obsolete - Not Available
 $2.99

Part Number:81267

Discontinued

Discontinued
 $2.99
Discontinued
32
Blade Adapter Obsolete - Not Available
 $5.11

Part Number:02617

Discontinued

Discontinued
 $5.11
Discontinued
34
Washer- Cupped (St-175Bc) Obsolete - Not Available
 $5.83

Part Number:580

Discontinued

Discontinued
 $5.83
Discontinued
35
Washer (St-175Bc) Obsolete - Not Available
 $2.99

Part Number:83030

Discontinued

Discontinued
 $2.99
Discontinued
36
Screw- Hex Hd. 5/16-18 X 1
 $3.99

Part Number:80085

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
37
Plate- Indicating Obsolete - Not Available
 $4.99

Part Number:UP04266

Discontinued

Discontinued
 $4.99
Discontinued
38
Nut (st-175c & St-175bc)
 $3.99

Part Number:UP04146

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
39
Switch- Toggle Obsolete - Not Available
 $13.00

Part Number:UP04261

Discontinued

Discontinued
 $13.00
Discontinued
40
Lead- Electrical (St-175C & St-175Bc) Obsolete - Not Available
 $2.99

Part Number:A98918

Discontinued

Discontinued
 $2.99
Discontinued
Engine & Peripherals
Homelite ST155 (UT-20539-A) String Trimmer Engine & Peripherals class=
 Fig #
1
Screw - Sems Hex (10-24 X 2-1/
 $3.99

Part Number:660673001

In Stock

In Stock

Note: Self retaining (330 only)
 $3.99
In Stock
 $3.99
3
Baffle- Muffler
 $3.99

Part Number:04790

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
5
Spacer- Muffler
 $3.99

Part Number:98860A

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
6
Plate-Reinforcing Obsolete - Not Available
 $2.99

Part Number:98783

Discontinued

Discontinued
 $2.99
Discontinued
9
Bracket- Obsolete - Not Available
 $4.99

Part Number:179

Discontinued

Discontinued
 $4.99
Discontinued
10
25cc Cylinder Kit
 $38.78

Part Number:UP07145A

In Stock

In Stock
 $38.78
In Stock
 $38.78
13
Piston Ring ( 1-5/16 In ) Obsolete - Not Available
 $2.99

Part Number:678001002

Discontinued

Discontinued
 $2.99
Discontinued
14
Spark Plug (Dj7Y) Obsolete - Not Available
 $4.99

Part Number:UP03883

Discontinued

Discontinued
 $4.99
Discontinued
14
Spark Plug (Dj7Y) Obsolete - Not Available
 $4.99

Part Number:UP03883

Discontinued

Discontinued
 $4.99
Discontinued
15
Crankshaft (Model 145 & 155) Obsolete - Not Available
 $39.97

Part Number:987582

Discontinued

Discontinued
 $39.97
Discontinued
16
Key-woodruff
 $4.99

Part Number:69250

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $4.99
Usually ships in 7 - 12 business days
 $4.99
17
Gasket- Crankcase Cover Obsolete - Not Available
 $3.99

Part Number:98767A

Discontinued

Discontinued
 $3.99
Discontinued
20
Clamp Obsolete - Not Available
 $3.93

Part Number:98752

Discontinued

Discontinued

Note: For older models with aluminum crankcase cover.
 $3.93
Discontinued
21
Shield Obsolete - Not Available
 $3.71

Part Number:98934

Discontinued

Discontinued

Note: For older models with aluminum crankcase cover.
 $3.71
Discontinued
22
Gasket- Heat Dam Obsolete - Not Available
 $4.99

Part Number:98765B

Discontinued

Discontinued
 $4.99
Discontinued
24
Heat Dam Obsolete - Not Available
 $4.99

Part Number:518070001

Discontinued

Discontinued
 $4.99
Discontinued
25
Screw- Taptite (10-24 X 1") Obsolete - Not Available
 $2.99

Part Number:UP05542

Discontinued

Discontinued
 $2.99
Discontinued
27
Zama Obsolete - Not Available
 $2.99

Part Number:A03003

Discontinued

Discontinued
 $2.99
Discontinued
27
Walbro Obsolete - Not Available
 $2.99

Part Number:A03002

Discontinued

Discontinued
 $2.99
Discontinued
28
Air Filter Obsolete - Not Available
 $14.80

Part Number:A04707A

Discontinued

Discontinued
 $14.80
Discontinued
29
Decal- Choke, Run Obsolete - Not Available
 $2.99

Part Number:00772

Discontinued

Discontinued
 $2.99
Discontinued
30
Decal- Push-Hold Obsolete - Not Available
 $2.99

Part Number:98943

Discontinued

Discontinued
 $2.99
Discontinued
31
Filter- Air Obsolete - Not Available
 $2.99

Part Number:D98760A

Discontinued

Discontinued
 $2.99
Discontinued
32
Cover- Crankcase Obsolete - Not Available
 $2.99

Part Number:98754B

Discontinued

Discontinued

Note: For older models with aluminum crankcase cover.
 $2.99
Discontinued
33
Screw-8-16 X 3/4"
 $3.99

Part Number:82536

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
34
Screw (10-24 X 2 1/4") Obsolete - Not Available
 $3.62

Part Number:82-542-7

Discontinued

Discontinued
 $3.62
Discontinued
35
Fuel Tank Assembly Obsolete - Not Available
 $7.79

Part Number:308123004

In Stock

In Stock
 $7.79
In Stock
 $7.79
39
Tubing
 $4.99

Part Number:0143922

In Stock

In Stock
 $4.99
In Stock
 $4.99
41
Gasket- Fuel Cap Obsolete - Not Available
 $3.99

Part Number:98805A

Discontinued

Discontinued
 $3.99
Discontinued
42
Valve- Duckbill
 $4.99

Part Number:560955001

In Stock

In Stock

Note: 2-5-20 (Rev:01)
 $4.99
In Stock
 $4.99
43
Fllter-cap
 $4.99

Part Number:PS98913

In Stock

In Stock
 $4.99
In Stock
 $4.99
46
Kit- Starter Pawl
 $53.27

Part Number:A70285E

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $53.27
Usually ships in 7 - 12 business days
 $53.27
47
Lead- Electrical (St-175C & St-175Bc) Obsolete - Not Available
 $2.99

Part Number:A98918

Discontinued

Discontinued
 $2.99
Discontinued
48
Housing- Engine (Clutch Models Only) Obsolete - Not Available
 $2.99

Part Number:A02576B

Discontinued

Discontinued
 $2.99
Discontinued
50
Screw (10-24 X 1 1/4")
 $3.99

Part Number:UP04267

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
52
Adaptor- Clutch (Clutch Models Only) Obsolete - Not Available
 $11.05

Part Number:01547A

Discontinued

Discontinued
 $11.05
Discontinued
54
Clutch Plate (Sold Individually) Obsolete - Not Available
 $8.45

Part Number:00242

Discontinued

Discontinued
 $8.45
Discontinued
55
Screw (10-24 X 7/8")
 $3.99

Part Number:88052

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
57
Starter Rope
 $4.99

Part Number:900849002

In Stock

In Stock

Note: 9-17-19 (Rev:04)
 $4.99
In Stock
 $4.99
58
Grip - Starter Obsolete - Not Available
 $2.99

Part Number:UP03832

Discontinued

Discontinued
 $2.99
Discontinued
59
Starter Pulley
 $4.99

Part Number:98770A

In Stock

In Stock
 $4.99
In Stock
 $4.99
60
Bracket-retaining Obsolete - Not Available
 $3.99

Part Number:98791

Discontinued

Discontinued
 $3.99
Discontinued
61
Screw (10-14 X 1/2 In)
 $3.99

Part Number:82541

In Stock

In Stock

Note: 2-5-20 (Rev:01)
 $3.99
In Stock
 $3.99
63
Crankshaft (Model 145 & 155) Obsolete - Not Available
 $7.21

Part Number:98797

Discontinued

Discontinued
 $7.21
Discontinued
64
Seal
 $3.99

Part Number:98800

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
65
Ring- Retaining
 $3.99

Part Number:98799

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
66
Bearing- Ball
 $7.43

Part Number:UP05589

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $7.43
Usually ships in 7 - 12 business days
 $7.43
68
Spring And Container
 $4.99

Part Number:638033001

In Stock

In Stock

Note: 9-27-18 (Rev:02)
 $4.99
In Stock
 $4.99
69
Screw (8-32 X 1 In. Torx Pan H
 $3.99

Part Number:82540

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: Torque Specs: 30-40 In/Lbs; 3.4-4.5 Nm
 $3.99
Usually ships in 7 - 12 business days
 $3.99
70
Ignition Module Obsolete - Not Available
 $51.19

Part Number:94711CS

Discontinued

Discontinued
 $51.19
Discontinued
71
Lead- High-Tension Obsolete - Not Available
 $8.12

Part Number:69326

Discontinued

Discontinued
 $8.12
Discontinued
72
Terminal-Hi-Tension Obsolete - Not Available
 $3.96

Part Number:A33055

Discontinued

Discontinued
 $3.96
Discontinued
73
Washer, Flat 11/32 In.
 $3.99

Part Number:631049001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 9-27-18 (Rev:02)
 $3.99
Usually ships in 7 - 12 business days
 $3.99
74
Screw- Hex Sems (10-24 X 3/8") Obsolete - Not Available
 $2.99

Part Number:PS05243

Discontinued

Discontinued

Note: Torque Specs: 15-25 In/Lbs; 1.7-2.8 Nm
 $2.99
Discontinued
75
Terminal (Models 385--Ut15040B, Ut15040C, & Ut15040D) (Model 485 Obsolete - Not Available
 $2.99

Part Number:2851

Discontinued

Discontinued
 $2.99
Discontinued
80
Lead- Electrical (Model 385--Ut15040B, Ut15040C, Ut15040D & Mode Obsolete - Not Available
 $4.99

Part Number:A00681

Discontinued

Discontinued
 $4.99
Discontinued
81
Spring - Compression
 $4.99

Part Number:95020A

In Stock

In Stock
 $4.99
In Stock
 $4.99
82
Screw, Thread Form (6-19 X 1/2
 $4.99

Part Number:82513

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $4.99
Usually ships in 7 - 12 business days
 $4.99
84
Button - Switch
 $3.99

Part Number:98769

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $3.99
Usually ships in 7 - 12 business days
 $3.99
85
Screw- Hex Sems (10-24 X 3/8") Obsolete - Not Available
 $2.99

Part Number:82268

Discontinued

Discontinued
 $2.99
Discontinued
87
Nut- Square Obsolete - Not Available
 $2.99

Part Number:97574

Discontinued

Discontinued
 $2.99
Discontinued
88
Screw Obsolete - Not Available
 $2.99

Part Number:82455

Discontinued

Discontinued
 $2.99
Discontinued
89
Washer
 $4.99

Part Number:638090001

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days

Note: 11-28-16 (Rev:02)
 $4.99
Usually ships in 7 - 12 business days
 $4.99
Miscellaneous Parts
 Fig #
800
Tool-holding Pin
 $4.99

Part Number:099078001040

In Stock

In Stock
 $4.99
In Stock
 $4.99
801
Grease, Multi-Purpose Obsolete - Not Available
 $6.21

Part Number:18453

Discontinued

Discontinued
 $6.21
Discontinued
802
Carburetor Repair Tool Obsolete - Not Available
 $91.50

Part Number:PS17789

Discontinued

Discontinued
 $91.50
Discontinued
803
Screw-Machine (10-24 X 2 1/4") Obsolete - Not Available
 $23.54

Part Number:23488C

Discontinued

Discontinued
 $23.54
Discontinued
804
Module Air Gap Shim Obsolete - Not Available
 $2.99

Part Number:PS24306

Discontinued

Discontinued
 $2.99
Discontinued
805
Screw-Sems (10-24 X 1") Obsolete - Not Available
 $17.50

Part Number:A04191

Discontinued

Discontinued
 $17.50
Discontinued
807
Tubing-rubber
 $45.55

Part Number:9477299

Usually ships in 7 - 12 business days

Usually ships in 7 - 12 business days
 $45.55
Usually ships in 7 - 12 business days
 $45.55
808
Carburetor Kit (Non-Clutch) Obsolete - Not Available
 $27.65

Part Number:98052A

Discontinued

Discontinued
 $27.65
Discontinued
820
Gasket/Diaphragm Kit Obsolete - Not Available
 $13.25

Part Number:A00285A

Discontinued

Discontinued
 $13.25
Discontinued
822
Primer Bulb Od: 5/8
 $4.99

Part Number:UP04802

In Stock

In Stock
 $4.99
In Stock
 $4.99
Trimmer Parts

Repair Guides for Homelite String Trimmer ST155 (UT-20539-A)

How to Replace the Drive Shaft on a String Trimmer

Learn how to properly replace the drive shaft on your string trimmer in less than 30 minutes.

Quick Fix: How to Clean a Spark Arrestor Screen on a Small 2-Cycle Engine

This repair video will instruct you how to repair a dirty or damaged spark arrestor on your small engine.

Quick Fix: How to Replace the Spark Plug in a Small Engine

This video will help you replace the spark plug on a small engine which will help get your gas powered equipment up and running again.

How to Replace the Fuel Filters in Your Outdoor Power Equipment

This video will help you troubleshoot your fuel-line replacement repairs.

Questions & Answers for Homelite ST155 (UT-20539-A)


What is causing the pull cord to brake?
Jim for model number ST 155 homelite weed trimmer asked on 2023-05-12
Hi Jim, Thank you for your question. Over time, through use, the pull cord will wear and eventually break. We hope this helps!
eReplacementParts Team May 12, 2023
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Midvale, UT 84047
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