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McCulloch
Gas Line Trimmer

Model # MAC284S 12-400128-77 Official McCulloch trimmer

Here are the diagrams and repair parts for Official McCulloch MAC284S-12-400128-77 trimmer, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 123 parts  |
Tank,fuel/ca 300871
#22

Powerhead assembly diagram

Tank,fuel/ca

Part #300871

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

Woodruff Key 102164
#36

Powerhead assembly diagram

Woodruff key

Part #102164

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

Bolt 09075-99
#31

Shaft/shield assembly diagram

Bolt

Part #09075-99

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

Grommet Wire 110995
#43

Powerhead assembly diagram

Grommet wire

Part #110995

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

Screw 223357
#17

Starter housing assembly diagram

Screw

Part #223357

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

Air Box 224238
#13

Powerhead assembly diagram

Air box

Part #224238

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

Screw 217935
Screw

Part #217935

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

Retainer Ring 111086
#33

Powerhead assembly diagram

Retainer ring

Part #111086

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

Plate 322362
#16

Starter housing assembly diagram

Plate

Part #322362

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

Muffler 300628
#2

Powerhead assembly diagram

Muffler

Part #300628

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.

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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

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

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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