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Model # 780R Official Ryobi 2-cycle gas trimmer
Here are the diagrams and repair parts for Official Ryobi 780R 2-cycle gas trimmer, as well as links to manuals and error code tables, if available.
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780R Line Trimmers
#32
Boom and trimmer parts diagram
Blade
Part #791-145873
Replaced by #791-145873B
?
Manufacturer substitution
This part replaces 791-145873. Substitute parts can look different from the original.
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#40
Engine parts diagram
Lead wire
Part #791-182798
The manufacturer no longer makes this part, and there's no substitute part
#15
Boom and trimmer parts diagram
Nut
Part #791-181815
The manufacturer no longer makes this part, and there's no substitute part
#31
Engine parts diagram
Starter housing
Part #791-181797
The manufacturer no longer makes this part, and there's no substitute part
#35
Engine parts diagram
Clutch drum
Part #791-153592
The manufacturer no longer makes this part, and there's no substitute part
#34
Boom and trimmer parts diagram
Drive shaft
Part #791-181817
The manufacturer no longer makes this part, and there's no substitute part
#9
Boom and trimmer parts diagram
J-handle a
Part #791-181099
The manufacturer no longer makes this part, and there's no substitute part
#6
Boom and trimmer parts diagram
Throttle cable
Part #753-04278
The manufacturer no longer makes this part, and there's no substitute part
#8
Engine parts diagram
Screw
Part #791-181860
The manufacturer no longer makes this part, and there's no substitute part
#28
Boom and trimmer parts diagram
Retainer
Part #791-612026
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.
Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings…
Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…
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 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 difficulty
Time required
15 minutes or less
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 difficulty
Time required
15 minutes or less
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 difficulty
Time required
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.
Trying to decide between a straight shaft and curved shaft trimmer? This guide compares both designs to help you underst…
Wondering if your weed whacker can pick up the slack for your broken lawn mower? You're not alone. In this guide, we bre…