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Discuss | Repair Videos | Articles
Discussion for the Troy-Bilt TB80EC (41ADT80C966) Trimmer
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Question: TB2020XP Carb Adjustment
The link has been removed on the TB80 carb adjustment. My TB will only run with the choke partially on. That indicates that it is running lean. I need to adjust the high speed needle, but I guess the EPA got into the business of requiring special tools for these adjustments.
Reply: TB2020XP Carb Adjustment
you would need to adjust the low speed needle
Question: Model TB80EC TroyBilt Trimmer
How do you access the carb adjustment screws on the TB80ec
Reply: Model TB80EC TroyBilt Trimmer
Without the specific tool for those screws, you can improvise. Diaphragm carbs nowadays have 4 different types of mixture screws used in them 1. Splined (pretty common) 2. D-Head 3. Double-D Head 4. Pac Man
In a pinch you can use a 22 gauge automotive wire connector. I like the female spade terminal connector. These connectors are plastic, so they expand somewhat and grip the screws. Tap one of them onto the screw head until tight, and then adjust. I use the female spade part as the handle. Careful adjusting, as these carbs are sensitive. Here is a LINK to the proper way to adjust a carburetor on the Troy Bilt.
Question: Lower Shaft Replacement
the spring loaded button that positions the lower shaft with the upper shaft broke. having to order part because I can't use a screw to keep shaft from rotating in use because the drive shaft runs through. the top is easy but was concered that the lower part would be tricky to put into the housing that curves downward. are there any springs or items I should be aware of before taking off the old lower shaft? the unit is only a year old and has been used maybe less than 20 times.
Reply: Lower Shaft Replacement
The replacement of the 753-08164 Lower Boom Assembly, should not be difficult. You will just need to remove the 753-06571 Gear Box Assembly and the 753-06123 Shield Assembly. There are no springs or hidden parts that you should be concerned with. Just make sure you line up the drive shaft into the coupling and Gear Box, and you should be good to go.
Question: Clutch's Spring.
I have replaced clutch essy twice but spring keeps break and falled out. what am I missing or doing wrong. Thanks.
Reply: Clutch's Spring.
Can you tell us what machine this is and what the model number is so we can help?
Question: The Use Of Regular Gas Instead O...
What happens when one used regular gas instead of mix
Reply: The Use Of Regular Gas Instead O...
Instead of explaining on what happens when oil is not mixed with gas for a 2 cycle engine. We have a short article and video on How to Mix 2-Cycle Engine Oil. Watch the video to see what happens.
Hope this helps,
Question: Gearbox Assembly
Can I order a straight gear box instead of the angled gear box? The one I ordered did not last but one season
Reply: Gearbox Assembly
I don't think another gearbox assembly would work on a different model trimmer other than the one it has in the parts diagram. It may not connect correctly with the model you have.
Question: Upper Drive Shaft And Housing As...
can you get just the upper drive shaft without the housing assembly
Reply: Upper Drive Shaft And Housing As...
On this model the only way you can get the upper drive shaft is by ordering the part number 753-04344 upper drive shaft and housing assembly.
Question: Connections Inside Fuel Tank
I have two connections (hoses) inside the fuel tank, one has the fuel filter and the other seems to serve no purpose at all, and yet it has a small tube connector on the end (inside the fuel tank) am I missing something?
Reply: Connections Inside Fuel Tank
The line with the filter is the feed line to the carburetor. The other line is the priming return line. No idea why the fitting would be inside the tank. Those little fittings are commonly used on the exterior of the tank. Most manufactures don't use the fittings anymore. They used to attach the two fuel lines to the tank with a short lead on each tube. Then a longer piece of line was attached to one or both lines as needed to reach the carb. Most tank assemblies now just have longer pieces of line installed so the joining piece is not needed.
Hope this helps,
Question: Gear Box Assembly
this may be a really dumb comment- I am assuming that the gears and ball bearing are inside the part as shown and are included in the assembly price. Is this correct?
Reply: Gear Box Assembly
Your assumption is correct. All the gears and bearings are included in the 753-06571 gear box assembly.
Question: Discussion For Gear Box Assembly...
Is this part the same as 753-06571 that is used on a Craftsman weed trimmer? The part looks the same but that doesn't mean much.
Reply: Discussion For Gear Box Assembly...
You can consider yourself safe in ordering part number 753-06571 for your Craftsman trimmer. It's probably made for Sears by the company that manufactured that one.