Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Weed Eater
Gas Line Trimmer

Model # MX557 Official Weed Eater line trimmer

Here are the diagrams and repair parts for Official Weed Eater MX557 line 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.

Owner’s manual

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 87 parts  |
Lawn & Garden Equipment Engine Fuel Filter (replaces 530010811, 530014199, 530-014199, 530014362, 530-014362, 530014815, 530023364, 530047004, 5300956-46, 530095649) 530095646
#58

Cylinder/crankshaft/crankcase diagram

Lawn & garden equipment engine fuel filter (replaces 530010811, 530014199, 530-014199, 530014362, 530-014362, 530014815, 530023364, 530047004, 5300956-46, 530095649)

Part #530095646

BEST SELLER
$8.93 | 
10% OFF Phone Price : $9.93
In Stock
Lawn & Garden Equipment Fuel Line, Small (replaces 530021058, 530-021058, 530021076, 5300692-47, 530-069247, 530-069751, 530071404) 530069247
#56

Cylinder/crankshaft/crankcase diagram

Lawn & garden equipment fuel line, small (replaces 530021058, 530-021058, 530021076, 5300692-47, 530-069247, 530-069751, 530071404)

Part #530069247

BEST SELLER
$10.11 | 
17% OFF Phone Price : $12.11
In Stock
Lawn & Garden Equipment Fuel Line, Large (replaces 530021017, 530-021025, 530021026, 530-021026, 530021028, 530-021028, 530-021035, 530021042, 530021132, 530028505, 530-028505, 5300692-16, 530-069216) 530069216
#57

Cylinder/crankshaft/crankcase diagram

Lawn & garden equipment fuel line, large (replaces 530021017, 530-021025, 530021026, 530-021026, 530021028, 530-021028, 530-021035, 530021042, 530021132, 530028505, 530-028505, 5300692-16, 530-069216)

Part #530069216

BEST SELLER
$14.44 | 
12% OFF Phone Price : $16.44
In Stock
Line Trimmer Primer Bulb 530058709

#NI03

All parts diagram

Line trimmer primer bulb

Part #530058709

BEST SELLER
$10.11 | 
17% OFF Phone Price : $12.11
In Stock
Lawn & Garden Equipment Flywheel 530054115
#41

Cylinder/crankshaft/crankcase diagram

Lawn & garden equipment flywheel

Part #530054115

Replaced by #545221701

?
Manufacturer substitution
This part replaces 530054115. Substitute parts can look different from the original.
This item is not returnable
$27.08 | 
18% OFF Phone Price : $33.08
In Stock
Piston Ring 530055120
#8

Cylinder/crankshaft/crankcase diagram

Piston ring

Part #530055120

Replaced by #545154001

?
Manufacturer substitution
This part replaces 530055120. Substitute parts can look different from the original.
This item is not returnable
$5.76 | 
15% OFF Phone Price : $6.76
In Stock
Line Trimmer Bump Feed Knob (replaces 5374196-01) 537419601
#29

Driveshaft/handle/shield diagram

Line trimmer bump feed knob (replaces 5374196-01)

Part #537419601

$11.14
In Stock
Lawn & Garden Equipment Screw 530015814
Lawn & garden equipment screw

Part #530015814

Replaced by #503210619

?
Manufacturer substitution
This part replaces 530015814. Substitute parts can look different from the original.
This item is not returnable
$4.31 | 
19% OFF Phone Price : $5.31
In Stock
Line Trimmer Spool Spring (replaces 5373388-01) 537338801
#25

Driveshaft/handle/shield diagram

Line trimmer spool spring (replaces 5373388-01)

Part #537338801

This item is not returnable
$7.20 | 
12% OFF Phone Price : $8.20
In Stock
Start Spring 530042086
#36

Cylinder/crankshaft/crankcase diagram

Start spring

Part #530042086

Replaced by #545008011

?
Manufacturer substitution
This part replaces 530042086. Substitute parts can look different from the original.
This item is not returnable
$16.71
In Stock

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…

Read more

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…

Read more

Why does my gas line trimmer leak gas?

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank…

Read more

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

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…

Read more
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 …

Read more
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…

Read more
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

Top 10 electric lawn and garden tools for 2023

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

Read more
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.…

Read more
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…

Read more

Parts & More