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Ryobi 990R string trimmer Parts

Here are the diagrams and repair parts for Ryobi 990R string trimmer, as well as links to manuals and error code tables, if available.

Ryobi 990R string trimmer
By Schematic
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This is the number corresponding to the part on the diagram / schematic

Browse Parts for990R Line Trimmers

  • Starter Pawl for Ryobi 990R - Part 180142

    #NI

    All parts diagram

    Starter Pawl

    Part #180142

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

  • Screw for Ryobi 990R - Part 181052

    Carburetor and muffler diagram

    Screw

    Part #181052

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

  • Screw for Ryobi 990R - Part 181080

    Clutch,starter module&fuel tank diagram

    Screw

    Part #181080

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

  • Housing for Ryobi 990R - Part 181092

    Housing

    Part #181092

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

  • Washer for Ryobi 990R - Part 147490

    Lower boom & cutting head diagram

    Washer

    Part #147490

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

  • Spring for Ryobi 990R - Part 181038

    Cylinder head diagram

    Spring

    Part #181038

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

  • Decal Kit for Ryobi 990R - Part 181103

    #NI

    All parts diagram

    Decal Kit

    Part #181103

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

  • Module for Ryobi 990R - Part 181067

    Carburetor and muffler diagram

    Module

    Part #181067

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

  • Spacer for Ryobi 990R - Part 181065

    Carburetor and muffler diagram

    Spacer

    Part #181065

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

  • Shaft for Ryobi 990R - Part 181017

    Cylinder and crankcase diagram

    Shaft

    Part #181017

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

Most common symptoms to help you fix your line trimmers

Choose a symptom to see related grass line trimmer repairs.

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure...

Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings...

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank...

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.

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...

Repair time and Difficulty

 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 ...

Repair time and Difficulty

 15 minutes or less
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...

Repair time and Difficulty

 15 minutes or less

Effective articles & videos to help repair your line trimmers

Use the advice and tips in these articles and videos to get the most out of your grass line trimmer.

Line trimmer: Preventing fuel vapor lock in hot summer conditions

Line trimmer: Preventing fuel vapor lock in hot summer conditions

Vapor lock can stop your trimmer cold in summer heat. Learn how to prevent it and keep your lawn looking sharp...

Straight shaft vs curved shaft trimmers: What’s the difference?

Straight shaft vs curved shaft trimmers: What’s the difference?

Trying to decide between a straight shaft and curved shaft trimmer? This guide compares both designs to help you underst...

Can you cut grass with a weed whacker?

Can you cut grass with a weed whacker?

Wondering if your weed whacker can pick up the slack for your broken lawn mower? You're not alone. In this guide, we bre...

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