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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.

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

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Owner’s manual

Model diagram and schematic

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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

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$9.20 | 
10% OFF Phone Price : $10.20
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

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$10.11 | 
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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

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$14.44 | 
12% OFF Phone Price : $16.44
In Stock
Ignition Module 530039234
#23

Cylinder/crankshaft/crankcase diagram

Ignition module

Part #530039234

Replaced by #501092801

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Manufacturer substitution
This part replaces 530039234. Substitute parts can look different from the original.
BEST SELLER
$30.33 | 
17% OFF Phone Price : $36.33
In Stock
Lawn & Garden Equipment Engine Air Filter (replaces 5300365-75, 530-036575) 530036575
#21

Cylinder/crankshaft/crankcase diagram

Lawn & garden equipment engine air filter (replaces 5300365-75, 530-036575)

Part #530036575

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This item is not returnable
$7.20 | 
12% OFF Phone Price : $8.20
In Stock
Line Trimmer Primer Bulb 530058709

#NI03

All parts diagram

Line trimmer primer bulb

Part #530058709

$10.11 | 
17% OFF Phone Price : $12.11
In Stock
Piston Ring 530055120
#8

Cylinder/crankshaft/crankcase diagram

Piston ring

Part #530055120

Replaced by #545154001

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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 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
Line Trimmer Carburetor Adapter 530057547
#14

Cylinder/crankshaft/crankcase diagram

Line trimmer carburetor adapter

Part #530057547

This item is not returnable
$16.71
In Stock
Line Trimmer Engine Gasket Set 530071750
Line trimmer engine gasket set

Part #530071750

This item is not returnable
$17.33 | 
10% OFF Phone Price : $19.33
In Stock

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…

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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…

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Why does my gas line trimmer leak gas?

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

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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

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…

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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

Top 10 electric lawn and garden tools for 2023

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

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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.…

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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…

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