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Model # TB90BC Official Troybilt 2-cycle gas trimmer/brushcutter
Here are the diagrams and repair parts for Official Troybilt TB90BC 2-cycle gas trimmer/brushcutter, as well as links to manuals and error code tables, if available.
Owner’s manualBy Schematic
SELECT DIAGRAM
Browse Parts for
TB90BC Line Trimmers
#42
Handle/throttle housing/shield diagram
Blade
Part #791-145873
Replaced by #791-145873B
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Manufacturer substitution
This part replaces 791-145873. Substitute parts can look different from the original.
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$57.59 |
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In Stock
#25
Engine parts diagram
Rope guide
Part #753-1200
$20.63
In Stock
#2
Engine parts diagram
Filter
Part #791-180350B
The manufacturer no longer makes this part, and there's no substitute part
#41
Engine parts diagram
Lead wire
Part #791-182798
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
#40
Handle/throttle housing/shield diagram
Inner reel
Part #791-147495
The manufacturer no longer makes this part, and there's no substitute part
#33
Engine parts diagram
Washer
Part #791-182368
The manufacturer no longer makes this part, and there's no substitute part
#13
Engine parts diagram
Crankcase
Part #753-04369
The manufacturer no longer makes this part, and there's no substitute part
#4
Engine parts diagram
Choke extension
Part #753-1193
The manufacturer no longer makes this part, and there's no substitute part
#23
Handle/throttle housing/shield diagram
Nut 8pk
Part #791-181886
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, 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 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
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.
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
Follow these tips to prevent the cutting line on your grass line trimmer from breaking or feeding out too much or too li…
Follow the steps in this video to replace a leaking fuel line in a line trimmer.…