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Ryobi
Gas Line Trimmer

Model # 720R-1 Official Ryobi trimmer

Here are the diagrams and repair parts for Official Ryobi 720R-1 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 97 parts  |
Screw 145888
#41

Engine diagram

Screw

Part #145888

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

Repair Kit 180091

#NI

All parts diagram

Repair kit

Part #180091

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

Spacer 145918
#27

Engine diagram

Spacer

Part #145918

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

Cover 683414
#1

Engine diagram

Cover

Part #683414

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

Screw 147544
#35

Engine diagram

Screw

Part #147544

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

Flywheel 153624
#26

Engine diagram

Flywheel

Part #153624

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

Strap 682075

#NI

All parts diagram

Strap

Part #682075

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

Coulping 683605
#8

Boom & trimmer diagram

Coulping

Part #683605

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

Module Assembly 683390
#44

Engine diagram

Module assembly

Part #683390

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

Shroud 153520
#24

Engine diagram

Shroud

Part #153520

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 …

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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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