Question about Troy Bilt Tb20cs 2 Cycle 31cc Gas String Trimmer 17" Cs
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Posted on Jan 02, 2017
SOURCE: runs only via primer bulb
You definitely have a fuel problem. But you will have to take the carburetor off and disassemble it. As far as other carburetor parts failing; yes , but it's probably do to old age or much use. You should first take the carb. apart and clean the all ports with a Den Tek Brush, (used for cleaning teeth), they work great for this job. The smallest particle's can keep the carb. from operating properly. Also, check for a small screen that filters the fuel. It sets down in a larger port. It can get clogged as well, or even blocked completely. If after you have done all of this and it still doesn't work, you will need to purchase a carburetor kit for unit. It will come with various gaskets, a screen, and a needle valve. this should definitely solve your problem. You will also want to change your air filter, (if you haven't already), because if it is old and dry rotted, pieces of the filter can get sucked into the carb. that you just spent an hour or so cleaning. You will then have to disassemble carb. and clean again, NOW THAT WOULD STINK!!
Posted on May 25, 2009
Sounds like you need to take the carb. apart and clean it. I like to use a Den Tek Brush, (used for cleaning teeth), to clean the small ports in carb. they work great for this job. Make sure to either clean or replace the small screen in thcarb. as well.
Posted on May 26, 2009
SOURCE: primer bulb won't prime
it sounds like the filter on the fule line is cloged try to remove the filter and then try to prime the trimmer. it it does you need to replace the filter. just about any filter that will fit will do.
Posted on Jun 10, 2009
The carburator has a sereis of one way check valves that get cloged very easily.
If you remove the carburator and clean it out with a simple cleaning solution you should be able to clean it up.Do not use compressed air.
Posted on Aug 04, 2009
You have done and are doing exactly what is necessary to solve your problem.
Lastly: remove your carburetor and clean it thoroughly using carburetor cleaner available at most auto parts stores. Replace the diaphragm and metering diaphragm. Diaphragms become stiff with age and with modern fuels and will not pull enough of a fuel-charge into the combustion chamber.
Posted on Sep 27, 2010
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