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McCulloch
Gas Line Trimmer

Model # MC025 TYPE 2 Official McCulloch trimmer

Here are the diagrams and repair parts for Official McCulloch MC025-TYPE-2 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 71 parts  |
Lawn & Garden Equipment Engine Fuel Return Line (replaces 5300695-99, 530-069599, 530069751) 530069599
#52

Cylinder/fuel tank/crankcase diagram

Lawn & garden equipment engine fuel return line (replaces 5300695-99, 530-069599, 530069751)

Part #530069599

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$8.67 | 
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In Stock
Lawn & Garden Equipment Engine Air Filter (replaces 5300365-75, 530-036575) 530036575
#20

Cylinder/fuel tank/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 | 
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Line Trimmer Primer Bulb 530058709

#NI04

All parts diagram

Line trimmer primer bulb

Part #530058709

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17% OFF Phone Price : $12.11
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Line Trimmer Carburetor 530071811
#17

Cylinder/fuel tank/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/fuel tank/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
Line Trimmer Engine Piston Ring (replaces 530055120) 545154001
#8

Cylinder/fuel tank/crankcase diagram

Line trimmer engine piston ring (replaces 530055120)

Part #545154001

This item is not returnable
$5.76 | 
15% OFF Phone Price : $6.76
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Leaf Blower Fuel Tank Cap 578931603
#51A

Cylinder/fuel tank/crankcase diagram

Leaf blower fuel tank cap

Part #578931603

Replaced by #578931604

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Manufacturer substitution
This part replaces 578931603. Substitute parts can look different from the original.
This item is not returnable
$8.67 | 
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In Stock
Weed Eater Line Trimmer Recoil Starter Pulley Kit 545050407
#33

Cylinder/fuel tank/crankcase diagram

Weed eater line trimmer recoil starter pulley kit

Part #545050407

This item is not returnable
$17.33 | 
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Line Trimmer Bump Feed Knob (replaces 5374196-01) 537419601
#28

Drive shaft/shield/handle diagram

Line trimmer bump feed knob (replaces 5374196-01)

Part #537419601

$11.14
In Stock
Line Trimmer Spool Spring (replaces 5373388-01) 537338801
#24

Drive shaft/shield/handle diagram

Line trimmer spool spring (replaces 5373388-01)

Part #537338801

This item is not returnable
$7.20 | 
12% OFF Phone Price : $8.20
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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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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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How to tune up a grass line trimmer video

How to tune up a grass line trimmer video

Tune of your grass line trimmer, following the steps in this video.…

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