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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 102 parts  |
Gasket 610675
#7

Engine diagram

Gasket

Part #610675

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

Spool Line 147345

#NI

All parts diagram

Spool line

Part #147345

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

Washer 145567
#15

Boom & trimmer diagram

Washer

Part #145567

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

Repair Kit 147171

#NI

All parts diagram

Repair kit

Part #147171

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

Inner Reel 153600
#26

Boom & trimmer diagram

Inner reel

Part #153600

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

Blade Assembly 682061
#20

Boom & trimmer diagram

Blade assembly

Part #682061

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

Rotor 153591
#37

Engine diagram

Rotor

Part #153591

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

Piston Ring 682507

#NI

All parts diagram

Piston ring

Part #682507

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

Piston Rod 147012
#50

Engine diagram

Piston rod

Part #147012

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…

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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