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Makita
Gas Line Trimmer

Model # RBC321 Official Makita string trimmer

Here are the diagrams and repair parts for Official Makita RBC321 string 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 129 parts  |
Hex Wrench 783202-0
#404

String trimmer diagram

Hex wrench

Part #783202-0

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

Crankcase Cpl. (incl. Fig. 42, 82) 531-10070-00
#41

String trimmer diagram

Crankcase cpl. (incl. fig. 42, 82)

Part #531-10070-00

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

Cylinder Gasket 531-15003-00
#52

String trimmer diagram

Cylinder gasket

Part #531-15003-00

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

Inlet Screen 501-60040-10
#117

String trimmer diagram

Inlet screen

Part #501-60040-10

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

Hanger Assembly (incl. Fig. 29) 625-40230-00
#18

String trimmer diagram

Hanger assembly (incl. fig. 29)

Part #625-40230-00

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

Needle Roller Bearing 061-00899-90
#91

String trimmer diagram

Needle roller bearing

Part #061-00899-90

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

Starter Pulley 524-50070-00
#63

String trimmer diagram

Starter pulley

Part #524-50070-00

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

Swivel 523-60180-40
#121

String trimmer diagram

Swivel

Part #523-60180-40

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

Screw M5x25 (5) 014-00597-90
#82

String trimmer diagram

Screw m5x25 (5)

Part #014-00597-90

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

Throttle Collar Screw (2) 524-60012-40
#119

String trimmer diagram

Throttle collar screw (2)

Part #524-60012-40

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 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…

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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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