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McCulloch
Gas Line Trimmer

Model # MC125 Official McCulloch trimmer

Here are the diagrams and repair parts for Official McCulloch MC125 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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Model diagram and schematic

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ALL PARTS
Showing 10 of 84 parts  |
Lawn & Garden Equipment Engine Fuel Filter (replaces 530010811, 530014199, 530-014199, 530014362, 530-014362, 530014815, 530023364, 530047004, 5300956-46, 530095649) 530095646
#54

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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$8.93 | 
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In Stock
Lawn & Garden Equipment Fuel Line, Small (replaces 530021058, 530-021058, 530021076, 5300692-47, 530-069247, 530-069751, 530071404) 530069247
#52

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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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
#53

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
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Line Trimmer Primer Bulb 530058709

#NI04

All parts diagram

Line trimmer primer bulb

Part #530058709

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Line Trimmer Carburetor 530071811
#17

Cylinder/crankshaft/crankcase diagram

Line trimmer carburetor

Part #530071811

$43.35 | 
12% OFF Phone Price : $49.35
In Stock
Lawn & Garden Equipment Engine Crankcase Plug 530057954
#46

Cylinder/crankshaft/crankcase diagram

Lawn & garden equipment engine crankcase plug

Part #530057954

This item is not returnable
$7.20 | 
12% OFF Phone Price : $8.20
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
Weed Eater Line Trimmer Recoil Starter Pulley Kit 545050407
#33

Cylinder/crankshaft/crankcase diagram

Weed eater line trimmer recoil starter pulley kit

Part #545050407

This item is not returnable
$17.33 | 
10% OFF Phone Price : $19.33
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
Start Spring 545213601
#32

Cylinder/crankshaft/crankcase diagram

Start spring

Part #545213601

Replaced by #545008011

?
Manufacturer substitution
This part replaces 545213601. 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.

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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 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 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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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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Solving 3 common problems with line trimmer cutting lines

Solving 3 common problems with line trimmer cutting lines

Follow these tips to prevent the cutting line on your grass line trimmer from breaking or feeding out too much or too li…

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How to replace a line trimmer fuel line video

How to replace a line trimmer fuel line video

Follow the steps in this video to replace a leaking fuel line in a line trimmer.…

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