Only with the Choke Engaged Will the Troy-Bilt String Trimmer Function (SOLVED)

While the engine is heated, the choke is often turned off so that the engine may continue to run. Nevertheless, as of right now, the choke lever has to be in the on position in order for your string trimmer to function properly. Find the cause of the issue with your trimmer by examining the things mentioned below.

When there is a problem with the amount of fuel or air that is entering the engine, a Troy-Bilt string trimmer will only operate with the choke engaged.

This might be the consequence of a limitation in the flow of gasoline caused by a dirty carburetor, a stopped fuel filter, a clogged fuel line, a closed fuel tank vent, or old fuel; it could also be the result of an excessive amount of air caused by a pierced fuel line or a faulty carburetor gasket.

Before doing any repairs, you need to remove the wire from the spark plug. Be careful, and make sure to go through all of the steps outlined in the Troy-Bilt operator’s handbook.

outdoorstip Troy-Bilt String Trimmer

There are six different explanations for why a Troy-Bilt string trimmer can only be used with the choke engaged.

1. Using Outdated Fuel in Your Troy-Bilt String Trimmer

The need to utilize the choke on a string trimmer due of a decrease in fuel flow may be one of the numerous complications that might arise when using gas that is beyond its prime.

It’s possible that the only way you’ll be able to keep the mower going is by adjusting the fuel-to-air ratio using the choke. This is because combustion requires a certain ratio of fuel to air.

As soon as 30 days after purchasing, gas might start to degrade and become less effective. This can happen very quickly. Ethanol may be included in the majority of gasoline marketed today.

This alternative fuel causes the fuel system to become more prone to the accumulation of moisture. Water and gas do not combine in any way. The combination of water and ethanol will get separated from the mixture of gasoline and oil. It leaves behind varnish, which might prevent gasoline from flowing freely or lead to the breakdown of components.

Ethanol is not recommended for use in a vehicle with a smaller engine. Never utilize fuels that have a high percentage of ethanol in them. Steer clear of gasoline labeled E15 and E85 since they may contain as much as 15 and 30 percent ethanol, respectively.

To operate properly, a Troy-Bilt string trimmer needs unleaded gasoline with an octane value of at least 89 and ethanol concentrations of no more than 10%.

  • Two-cycle string trimmers made by Troy-Bilt : need a combination of gasoline and two-cycle oil with a ratio of forty to one.
  • Troy-Bilt string trimmers with a 4-cycle motor: Gasoline alone is required (no oil is added).

SOLUTION: Clean out your string trimmer’s tank of any stale gasoline. To prevent the gas from becoming unstable, clean the fuel system, and cut down on the amount of moisture it contains, mix new gasoline in a fuel container with an additive such as Sea Foam or STA-BIL.

Put the fuel mixture into the tank that holds the gasoline. You will need to turn on your Troy-Bilt trimmer and let it run for around five minutes for the treated gasoline to make its way through the system.

If turning off the choke does not result in an improvement in the trimmer’s performance, proceed to inspect the following components:

2. Blockage in the Fuel Line or a Puncture on a Troy-Bilt String Trimmer

Old gasoline often leaves behind gooey deposits, which may adhere to the fuel line and cause the path to become more constricted. The flow of gasoline is impeded as a result.

You could also discover that the gasoline line has a break in it or that it has been pierced, both of which would enable air to be drawn into the fuel line.

In the event that the fuel line becomes clogged or punctured, the driver may be required to utilize the choke in order to adjust the fuel-to-air ratio in order to keep the engine running.

SOLUTION: It is necessary to remove and repair a gasoline line that has been ruptured or obstructed.

3. The fuel filter of a Troy-Bilt string trimmer was clogged with debris

A clogged Troy-Bilt fuel filter is another component that may reduce the amount of gasoline that can pass through it. It is possible to prevent dirt and other particles from entering the engine and fuel system by using a filter designed specifically for gasoline.

It is possible for the filter to get clogged if it is not changed often enough or if you are using the vehicle on gasoline that is particularly unclean. This prevents an adequate amount of fuel from passing through the filter. It is in your best interest to keep up with the maintenance of your gasoline filter by doing so at least once each year.

SOLUTION: It’s time to change the gasoline filter if it’s clogged. Inside of the gasoline tank is where you’ll find the filter. Before removing the gasoline tank cap, clean the area surrounding it with a damp cloth to prevent dirt from dropping into the tank.

It is important to make a mental note of the location of the gasoline filter within the fuel tank so that the replacement filter may be put in the appropriate area. Take the filter out of the tank and set it aside.

Hooking the gasoline linen with a clean wire that has been bent works great in order to remove the filter from the tank. It is time to replace the gasoline filter, so take off the old one, connect the new one to the end of the fuel line, and then replace it inside the petrol tank. Replace the gasoline cap in the tank.

4. A string trimmer manufactured by Troy-Bilt with a faulty carburetor gasket

The gasket that surrounds the carburetor is susceptible to wear and tear over time, which may make it less effective. When this occurs, the component will no longer seal correctly, which will enable extra air to enter the system and cause it to run leaner than normal.

When there is a greater concentration of air and less fuel than is needed by the engine, this is the condition that results.

SOLUTION: In order to get access to the carburetor, first remove the linkages and nuts that are attaching it. Take the carburetor and the gasket off of the engine.

Replace the old gasket with a brand-new one, then rejoin the carburetor, the bolt, and the linkages. When the carburetor is detached from the Troy-Bilt trimmer, you should examine whether or not it needs to be cleaned.

5. A Troy-Bilt String Trimmer with a Soiled Carburetor

The string trimmer’s ability to start and continue running is dependent on the carburetor’s ability to precisely control the quantity of fuel that is introduced into the air mixture during combustion.

The accumulation of varnish and deposits in the carburetor might cause it to not work properly, which prevents it from delivering gasoline to the engine.

SOLUTION: If you have any mechanical ability, you should have no problem taking care of the cleaning of your carburetor. To properly clean the carburetor, it must first be disassembled, and then a carburetor cleaner must be used in order to remove deposits that have been left behind by previous gasoline.

If, after being cleaned, the carburetor still does not operate properly, you will either need to be able to get a repair kit in order to rebuild the carburetor or you will need to replace it.

6. Plugged Fuel Tank Vent on a Troy-Bilt String Trimmer

A vent has to be installed in the gasoline tank so that air may enter it and bring the internal pressure up to the same level as the surrounding air. If the gasoline tank does not have a vent, a vacuum will be created within the tank, which will reduce the quantity of fuel that can reach the engine.

Because of this, it’s possible that you’ll have to operate the trimmer with the choke engaged. If your Troy-Bilt trimmer runs for a time before becoming slow to operate or turning off entirely, this is a solid sign that there may be an issue with the fuel tank vent.

The gasoline cap must first be removed in order to let air into the fuel tank before the engine will begin to operate more smoothly.

SOLUTION: Position the string trimmer so that it is level with the surface. Loosen the cap, but be careful not to let any gas escape. Get the trimmer up and running. Make sure the choke is turned all the way off.

If the trimmer can be used successfully with the choke turned off, the cap should be tightened and the machine should be allowed to continue to operate in this mode. If it stops working, you may have to repair the gasoline tank vent that became clogged up.

The majority of Troy-Bilt string trimmers have their vents located in the gasoline cap. Replace a faulty cap.