Model # ST-285BC Official Homelite trimmer

Here are the diagrams and repair parts for Official Homelite ST-285BC trimmer, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

Click a diagram to see the parts shown on that diagram.
In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 215 parts |

Figure 5 diagram

Throttle switch

Part #A-00738

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

#27

Figure 4 diagram

Blade

Part #02616

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

#50

Figure 1 diagram

Screw

Part #88054

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

Screw

Part #80085

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

Retainer

Part #A-98866-A

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

#NI

All parts diagram

Line trimmer primer bulb

Part #UP04802

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

Clamp

Part #00422

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

#73

Figure 1 diagram

Washer

Part #84065

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

#37

Figure 1 diagram

Tubing

Part #94772-32

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.

View all

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.

View all

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.

View all

Top 10 electric lawn and garden tools for 2023

Model # ST-285BC Official Homelite 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

Parts & More

Stay Connected

Quick links

Let us help you

More resources