Models
>
TB21EC
TB21EC (41ADT21C966) Troy-Bilt Trimmer
Jump to:
Find Part by Name
Keep searches simple, eg. "belt" or "pump".
Diagrams for TB21EC
Viewing 2 of 2
Keep searches simple, eg. "belt" or "pump".
$51.57
A carburetor basically consists of an open pipe through which the air passes into the inlet manifold of the engine. The pipe is in the form of a Venturi: it narrows in section and then widens again, ...
In Stock
Order now and your part arrives by Mar 30
$11.95
This is a genuine OEM replacement throttle trigger (red). The throttle trigger is responsible for managing the speed of the engine. The throttle cable attaches to the trigger, which connects to the th...
In Stock
Order now and your part arrives by Mar 30
$11.59
This is a genuine OEM sourced part which is specially made for use with Craftsman handheld lawn and garden equipment. Its purpose is to deliver electric current from the ignition system to the combust...
In Stock
Order now and your part arrives by Mar 30
$17.25
Genuine OEM replacement part, this item is sold individually. This spring is used on all of the trimmers listed below. It is installed between the inner reel and the outer spool assembly. Its purpose...
In Stock
Order now and your part arrives by Mar 30
$6.51
This is an authentic Craftsman replacement part that has been sourced from the original manufacturer to be used with trimmers and blowers. The gasket is used to seal the connection between the carbure...
In Stock
Order now and your part arrives by Mar 30
$6.51
This is a manufacturer approved O-Ring designed for lawn and garden equipment. This is the O-Ring that provides an Air Tight seal between Carburetor and Cylinder Head. If doing maintenance on carburet...
In Stock
Order now and your part arrives by Mar 30
$6.51
This air filter is an original sourced directly from Craftsman. The filters purpose is to keep dirt, dust and other contaminants from entering the carburetor and engine. You can clean this foam filter...
In Stock
Order now and your part arrives by Mar 30
$36.98
This is a genuine Craftsman replacement part that is sourced from the original manufacturer to be used with trimmers. The plastic reel is part of the cutting head assembly and is used to store the tri...
Special Order
$100.23
This is a genuine OEM sourced replacement part designed for use with string trimmers. This item is made out of metal and it is sold individually. It is the upper shaft that is attached to the motor. ...
In Stock
Order now and your part arrives by Mar 30
This is a Genuine OEM replacement part used on specific Gas Trimmers. This Aircleaner Cover is made out of Plastic with Metal Bushings. This Assembly includes Two (2) Metal Screws used to attach it. T...
Special Order
This is a genuine replacement part is designed for use with handheld trimmers. It is sourced from original manufacturer and it is sold individually. This split boom coupler includes metal coupler, kno...
Special Order
$12.79
This is a genuine manufacturer approved replacement mulching door torsion spring designed for use with handheld trimmers/edgers. This spring helps the throttle trigger to retract. It is made out of me...
In Stock
Order now and your part arrives by Mar 30
Questions and Answers
We're sorry, but our Q&A experts are temporarily unavailable.
Please check back later if you still haven't found the answer you need.
Common Problems and Symptoms for TB21EC
Viewing 2 of 2Will Not Start
Fixed by these parts
How to fix it
Engine stops after a few seconds or minutes
Fixed by these parts
How to fix it
Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
string trimmer would not start
emptied fuel from tank. pulled off the 2 fuel lines from the carburetor.opened the air cleaner door. removed the 2 torque screws that hold on the carburetor. removed the carburetor and air cleaner gasket. installed new carburetor and gasket and put back and tightened the 2 torque screws. closed air cleaner door and pushed the fuel lines o
... Read more
nto the new carburetor.put some fuel in the tank. started the trimmer. runs great.
Read less
Was this instruction helpful to you?
Thank you for voting!
Trimmer Would Not Start
The replacement of the carburetor, O-ring, and gasket was simple. I removed 2 screws that held the air cleaner and carburetor in place, swapped them out, and replaced the screws. What took longest was finding a piece of fuel line after breaking one of them. It was brittle after hanging in my garage for several years. I found some in my
... Read more
garage and replaced it. It took a few pulls to get it started, but ran very smooth.
Additional information: rather than mixing my fuel, I purchased 40:1 pre-mix fuel to prevent gunking up the carburetor in the future. I use it in my other trimmer and have not had any issues.
Additional information: rather than mixing my fuel, I purchased 40:1 pre-mix fuel to prevent gunking up the carburetor in the future. I use it in my other trimmer and have not had any issues.
Read less
Was this instruction helpful to you?
Thank you for voting!
Broken air cleaner
remove two screws holding old air cleaner housing to carburetor and manifold. The carburetor will come off but don't worry as long as gasket does not tear. line up new housing, put the 2 new screws in and tighten. put new filter in and the new cover on and done
Was this instruction helpful to you?
Thank you for voting!