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Troy-Bilt TB20CS (Tuffy 41BDT20C966) Trimmer Parts
How to Replace the Muffler on a Troy-Bilt Pony Lawn Tractor
In this article we'll walk you through the process of replacing the muffler in a Troy-Bilt Pony Lawn Tractor.
How to Replace the Lower Handle on a Troy-Bilt Super Bronco Tiller
This article will guide you through the process of replacing a lower handle assembly in a Troy-Bilt Super Bronco Tiller...
How to Replace the Starter Assembly on a Troy-Bilt Super Bronco Tiller
This article walks you through the steps of replacing a broken or damaged started assembly in a Troy-Bilt Super Bronco tiller.
How to Test a Small Engine for Spark
If your small engine isn't starting, you'll need to diagnose many issues including the spark plug. This video walks you through the steps of how to test for a spark using a spark tester.
Discussion for the Troy-Bilt TB20CS (Tuffy 41BDT20C966) Trimmer
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Question: Fuel Line Assembly
Does anyone have a diagram for which fuel line goes where on a 2 cycle troy bilt tb20cs tuffy weed eater?
Reply: Fuel Line Assembly
Question: Troy Bilt TB20CS Lost Part
Somehow the nipple that holds the lower drive shaft and cable assembly and the split boom coupler together has disappeared from my trimmer. Does anyone know if that is part of the lower drive shaft and cable assembly, is it part of the split boom coupler, or part of the upper drive shaft and cable assembly? I can't tell what to order from the pictures.
Reply: Troy Bilt TB20CS Lost Part
[QUOTE=christisking;69569]Somehow the nipple that holds the lower drive shaft and cable assembly and the split boom coupler together has disappeared from my trimmer. Does anyone know if that is part of the lower drive shaft and cable assembly, is it part of the split boom coupler, or part of the upper drive shaft and cable assembly? I can't tell what to order from the pictures."
Need see the nipple that holds the shaft together make them work
Question: Primer Replacement
I replaced the primer bulb but I got the three hoses mixed up putting it back together.
Any one out there that can explain which hose goes on which nipple?
Reply: Primer Replacement
That is a very common issue. For that reason we prepared an article and video to help you out with that. Here is the link to it. How to Replace Fuel Lines on a 2 Cycle Engine.
Hope that helps,
Question: Remove Cutting Head
Hello, How do I remove the cutting head? That's the part that stays connected to the shaft. It's NOT the part that you spool the line in. I believe it's figure 18 in the above diagram.
Reply: Remove Cutting Head
Hi lindsaylsu2. Did you ever get an answer to your problem? I have the same difficulty and cannot find anyone who knows how to take this part off of the weed eater.
Reply: Remove Cutting Head
You will have to remove the 791-610660 retainer, up inside of the outer spool. You may heed some needle nose pliers to get a hold of it. Don't worry about damaging it. When you order the new 753-04284 outer spool it comes with a new retainer.
i am replacing the pull cord on my weed eater and i need to knowhow to get to the recoil pulley, i can everything on the back off i just can figure out how to get the front (red) cover off..
thanks in advance...
We have an article and video that shows how to remove the clutch so that you can access the starter assembly. Our demonstration uses a Ryobi trimmer but I think you will find the information to be helpful and very similar. You can view it at the following link...
How to Remove a Trimmer Clutch.
I hope this helps,
Question: Spring Assit On A Troy Bilt
I have a tb20cs Troy bilt gas trimmer with a spring assist. the pull rope just pulls and a clanking sound is heard. It does not try to start the engine. How do I repair this.
Reply: Spring Assit On A Troy Bilt
Question: Attachments Stopped Working
I just attached the hedge trimmer and the blades barely turn, while I hear a different noise up near the top of the unit. None of the other attachments work now.
Reply: Attachments Stopped Working
Most likely either the coupling on the upper shaft has broken or the clutch drum has failed where the shaft goes into it. You will need to do some disassembly to determine which it is. The upper shaft is part #753-04236 and the clutch drum is part #791-153592.
I hope this helps!
Question: Unit Cannot Drive Edger
The engine revs and runs just fine for use as string trimmer! When I attach the edger, the blade does not have any torque when set to grass for edging...The engine is strong, but I am getting no power to drive edger attachment. Should I replace the clutch assembly? I am not sure what else could be the problem.
Question: Carburation Problems?
Rob - Virginia
I have a 2007 Troy Bilt TB20C String Trimmer. The last couple times that I've used it, the trimmer begins to stall and cut out when I increase throttle. Yesterday, I tried to start it and I noticed the push primer wouldn't return and re-inflate to start the next push prime sequence. After unhooking both lines leading to the push primer I discovered that the line leading to the carburetor is not allowing fuel flow and thus has the push primer air locked. Why is the fuel line stopped? I don't see any blockages or dirt. Is something wrong with the carburetor?
Reply: Carburation Problems?
I am in the same position as above. please help.
Reply: Carburation Problems?
If the line leading to the carburetor is not allowing fuel to flow I would suspect that the fuel filter is clogged. That is about the only thing that could restrict flow to the carb.
It is also possible that you are having some issues with the internal parts of the carburetor. The ethanol in today's fuel can cause damage to the carburetor diaphragm and reed valves.
We have a couple of articles and videos that I think will help you with your carburetor problem. You can find them here...
How to Clean a 2-Cycle Carburetor
How to Replace Fuel Lines on 2-Cycle Engines.
I hope this helps,
Reply: Carburation Problems?
I am having a similar problem with my TB20C String Trimmer too. I just replaced all the fuel lines and can prime the carburetor just find. It will start and run a few seconds only before it stops. I have noticed that it causes a vacuum in the gas tank and it may not allow more fuel to feed into the carburetor to continue running. Please let me know if the fuel tank should have a vacuum after a few seconds of running. I can prime it after taking the gas cap off.
My Troy Bilt trimmer won't start. I had recently realized that I was running it for some time with too much oil, and it recently cut out shortly after starting and was blowing more smoke than usual. I drained the gas tank and replaced with correct fuel/oil mix, and also replaced the spark plug and cleaned out / re-lubed the air filter/cleaner. This didn't seem to help. So I did a more extensive dis assembly and took the front and back plates off the carb and tried to clean the carb out. Still won't start. Any ideas on what else I can try?
Update: I noticed there was something rattling around in the muffler. I managed to get a couple of pieces out, looked like piston ring. Took the cylinder off and found that the piston had lost a "chunk" of material, and piston rings were failed. So my oil/gas mix ratio was not the culprit... now it's a matter of replacing the piston. Any opinions on whether I should also replace the muffler, or let it run with chunks of piston in it? I can't take it apart as far as I can tell.
Question: Installation Of Upper Boom
I am installing the Upper Boom that I ordered and the product information sheet says "to remove and discard the spring that is in front of the clutch drum. This Spring IS NOT to be re-installed with your new upper boom. Please refer to the parts list for your unit." I did not see a spring when I took the unit apart should there have been one and what is the part number?
Question: Starter Rope
How do I remove the clutch to install a new rope in the starter housing?
Reply: Starter Rope
Remove the screws that hold on the Cover Assembly (Torx 15). The throttle housing and trigger assembly will put away only a few inches. Rotate it to the side. Its a little more work to remove the kill switch and throttle cable but it can be done. Just more to assembly later.
Remove the spark plug. Using a torx 15 screw driver insert it into the center of the Clutch Drum and turn clockwise and rotate the piston to the bottom of its stroke. I usually use a small wooden dowel in the spark plug hole to verify it is at the bottom of the stroke. Now put in clean nylon string (same size as your starter string) and fill the piston chamber. This will provide something to compress the piston against. Now continue to rotate your torx 15 screw drive and remove the Clutch Drum. Under it is the Clutch rotor assembly. It has an arrow on it that shows you which way to turn to get it off. It is hard to break free. Do not put vise grips on it or scratch the surface. I have a 1 1/2 inch open faced wrench I use but anything that is smooth and fits around it to help rotate the assembly works. There is small washer on top of the clutch rotor assembly and one on the bottom. Don't loss them. Then remove the five screws on the Starter housing. You may have cut one of the plastic tie backs on the electrical housing to get the housing to slide away. Now inside the housing their is a lock washer on top of the starter rope pulley assembly. You can kick it of with a flat head screw driver but it will fly across the room. Just watch it. You will need it later.
The rest is pretty easy from there.
Be sure to assemble correctly. The washers around the rotor assembly are critical to smooth operations. Good luck !!!
Question: Pull String Stuck - Engine Will ...
I was in the middle of weed whacking last week when my Troy-Bilt TB20CS stopped. When I tried to restart the unit the string would not pull, it seems stuck.
What does this mean?
Reply: Pull String Stuck - Engine Will ...
That sounds like the symptoms of a seized engine. This is usually caused by fuel without enough oil mixed in it or by a carburetor that is set too lean. You could remove the housings and try to move the flywheel by hand. If it won't turn the engine is likely seized. A total rebuild would be required. A new trimmer may be cheaper.
Good luck with your repair!
Question: Carburation Choke Starting And R...
My trimmer is very hard to start this year. When, and if, it started it would only run fully choked or just off choke. No way would it run with the choke off. My Ryobi blower does the same. I suspect last years fuel is effecting the throttle body. I am afraid to disassemble the carb. Help.
Reply: Carburation Choke Starting And R...
It is really not as hard as you may think to take the carburetor apart and reassemble it. You only have to remember to put it back together like you took it apart. when you take apart the fuel pump assembly (if applicable) take it apart like your reading a book, and just put it back together the same way so you don't mix up the diaphragms and gaskets. Don't be scared. good luck
Question: Carb Rebuild
I want to rebuild the carb for my TB20cs trimmer but can't find a rebuild kit. Any suggestions?
Reply: Carb Rebuild
Troy-Bilt does not offer a carb kit for the carburetor on this trimmer. The carburetor will need to be replaced. The carburetor is part #753-04338 and is available from http://www.ereplacementparts.com
Good luck with your repair!
Question: Upper Drive Shaft Housing
Does part #753-04236 come with the drive shaft in it or is it just the housing?
Reply: Upper Drive Shaft Housing
The Upper Drive Shaft Assembly does include the shaft and the housing. It is part #753-04236 and is available from http://ereplacementparts.com.
Good luck with your repair!
Reply: Pull String
First you will need to do some dis-assembly. Remove the shaft assembly from the engine. Remove the front housing. Now you will need to remove the clutch and clutch drum. Removal of the clutch drum isn't too hard of a project at all if you know a few tricks first. The drum is held in place by a screw at the base of the hole on the end of the clutch drum. I believe your model of trimmer will require a Torx #T-25 driver to remove the screw but it could be a hex drive or Phillips as well. The screw will remove with a counter-clockwise rotation. When you try to rotate the screw the engine will likely rotate as well. Here is where a trick comes in. Remove the spark plug from the engine. Now find a piece of small rope, like an old shoe lace. Put the rope down in the hole for the spark plug. Be sure to leave enough of the rope hanging out of the hole so you can remove it later. The rope will bind up the piston so the engine can no longer rotate and now you can easily remove the clutch drum screw. With the clutch drum and clutch removed you will now be able to access the starter assembly to replace the rope.
I hope this helps with your repair!
Reply: Start Rope
I can think of a couple of things that could cause the starter rope to bind.
First, and hopefully this is the case, the starter rope itself may be bound on the starter rope pulley. The recoil in the starter assembly can sometimes break and also cause the starter to bind.
Second, if teh engine is run using gas taht doesn't have 2-cycle mix oil in it the engine will seize. Once the engine has seized you will no longer be able to pull the starter rope.
I hope this helps and good luck with your repair!
Question: Broken Pull String
If you have a broken pull sting it is very easy to fix. It took me about 30 minutes to get to the string. I bought some abrasion resistent nylon cord from a local hardware store for $2. It seems to work great.
Reply: Broken Pull String
I don't know what is going on. Every time I give it gas its dies. I need some help?
Question: Troy Bilt Tb20cs Repair
troybilt tb20cs trimmer-pull cord broke at knot on rewind spool-clutch was extremely tight- had to use a steel punch to break it loose with a nylon rope stuffed in s.p. side of cylinder-replaced cord and reassembled-pulls real nice with s,plug out & good compression on s.p. side-installed s.p. and pull cord feels like a bungie until 3/4 way out before it cranks Not my machine so I don't know if it was like that when I got it - owner may say it was working fine just the cord came out. Any ideas? thank you
Question: Troy Built Trimmer
I have a troy built weed eater. TB20CS. It bogs down when I give it full throttle. It almost dies. What could be the problem?
We took apart the carb. and made sure the gas mixture was good. Now the gaskets leak.:mad: Have to buy some of those.
Reply: Troy Built Trimmer
Start by giving the trimmer a basic tuneup. Replace the air filter, spark plug and fuel filter. If the trimmer still acts the same way then the exhaust is likely plugged. The exhaust becomes plugged when the trimmer is running rich. The rich condition can be caused by either a carb that is out of adjustment or by running the trimmer at less than full throttle for extended periods of time. Many times all that that is needed to clean the exhaust is to remove the muffler screen and burn it out with a propane torch. If the muffler itself looks clogged then you will need to replace the muffler.
There are four different versions of this trimmer. They are differentiated by a number that is printed on a barcode sticker. The sticker is usually placed on the underside of one of the plastic housings. You will likely need to remove the housings to find the number. The following link will take you to the page where you can select which version of trimmer you have and then on to the parts diagram for it.
Troy-Bilt TB20CS trimmers, select your type.
I hope this helps to get your trimmer running again!