Model #990R Official Ryobi string trimmer
Here are the diagrams and repair parts for Ryobi 990R string trimmer, as well as links to manuals and error code tables, if available.
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Showing 10 of 155 parts
Cylinder
Part #181002
The manufacturer no longer makes this part, and there's no substitute part
Driver
Part #147489
The manufacturer no longer makes this part, and there's no substitute part
Pulley
Part #180535
The manufacturer no longer makes this part, and there's no substitute part
Bracket
Part #181081
The manufacturer no longer makes this part, and there's no substitute part
Gasket
Part #181056
The manufacturer no longer makes this part, and there's no substitute part
Washer
Part #147490
The manufacturer no longer makes this part, and there's no substitute part
See All Related Diagrams
Housing
Part #181092
The manufacturer no longer makes this part, and there's no substitute part
Blade assembly
Part #682061
The manufacturer no longer makes this part, and there's no substitute part
Rope
Part #613103
The manufacturer no longer makes this part, and there's no substitute part
Coulping
Part #683605
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for gas line trimmers
Repair guides for gas line trimmers
If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these instructions to do the job in under 30 minutes.
If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these instructions to replace the carburetor in under 30 minutes.
The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yourself, following these instructions.
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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Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this helpful maintenance checklist.