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Troybilt TB90BC 2-cycle gas trimmer/brushcutter Parts
Here are the diagrams and repair parts for Troybilt TB90BC 2-cycle gas trimmer/brushcutter, as well as links to manuals and error code tables, if available.
Owner’s manual
By Schematic
SELECT DIAGRAM
Browse Parts for TB90BC Line Trimmers
Engine parts diagram
Carburetor
In Stock$69.62
Qty
Handle/throttle housing/shield diagram
Blade
Part #791-145873Replaced by #791-145873B
Manufacturer substitutionThis part replaces 791-145873. Substitute parts can look different from the original.In Stock$68.208% OFF Phone Price : $74.20
QtyHandle/throttle housing/shield diagram
Spool
Part #791-683301
The manufacturer no longer makes this part, and there's no substitute part
Engine parts diagram
Handle
Part #791-181079
The manufacturer no longer makes this part, and there's no substitute part
Engine parts diagram
Choke Extension
Part #753-1193
The manufacturer no longer makes this part, and there's no substitute part
#NI04
All parts diagram
Shifter Block
Part #753-04334
The manufacturer no longer makes this part, and there's no substitute part
Handle/throttle housing/shield diagram
Nut, Lh
Part #791-181699
The manufacturer no longer makes this part, and there's no substitute part
Engine parts diagram
Washer
Part #791-182368
The manufacturer no longer makes this part, and there's no substitute part
#NI02
All parts diagram
Repair Kit
Part #791-180091
The manufacturer no longer makes this part, and there's no substitute part
Handle/throttle housing/shield diagram
Adjustment Knob
Part #791-181981
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
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
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
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.
Vapor lock can stop your trimmer cold in summer heat. Learn how to prevent it and keep your lawn looking sharp…
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…
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