Troy-Bilt Chainsaw Only Operates with Choke Engaged: FIXED

Your chainsaw kicked off normally, but now it won’t run unless the choke is kept in place. If you want optimal performance, you need to identify the source of the problem and fix it.

To correct for either too much air or too little gasoline, the choke must be engaged before a Troy-Bilt chainsaw can start.

This could be the result of a number of factors, including stale fuel, a faulty gasket in the carburetor, a clogged fuel line, a blocked fuel vent on the fuel filter, or a dirty carburetor. Carburetor adjustment on the chainsaw could be necessary as well.

Always remove the spark plug boot from the chainsaw before servicing it. We must wait until the engine has cooled and all of the moving parts have stopped. For further precautions, please refer to the user guide.

Troy-Bilt Chainsaw

7 common causes of a chainsaw requiring the choke to be engaged:

Using old gas in a Troy-Bilt chainsaw

You can usually trace the formation of a fuel limitation in your Troy-Bilt chainsaw back to the use of old gas.

In order to limit the amount of air entering the engine, you may need to utilize the choke if you need to lower the fuel supply. Purpose: Adjust the gas-to-air mixture for optimal combustion.

For example, if you let gas sit in your Troy-Bilt chainsaw for too long, varnish and other sticky particles might form on the fuel’s surface, blocking the fuel’s ability to move freely through the engine.

In the event that you discover stale gas in your chainsaw, it is recommended that you empty the tank and refuel it with new gas and oil. To aid in fuel system cleaning and moisture reduction, a fuel stabilizer such as Sea Foam can be added to the gasoline.

It is recommended to run the chainsaw for several minutes after refilling the tank with new fuel and a stabilizer mix in order to move the treated fuel through the chainsaw and break up any gummy residue.

Follow these guidelines to lessen your fuel’s negative effects:

  • Get gas with at least 89 octane.
  • Use gas with no more than 10% ethanol content.
  • For Troy-Bilt two-stroke chainsaws, the fuel mixture is gasoline to premium two-cycle oil at a ratio of 40:1.
  • Keep fuel in a cool, dry place.
  • Fuel should be used within 30 days, or a fuel stabilizer can be added to extend its shelf life.

Read this post about selecting and storing gas for a Troy-Bilt chainsaw if you want to know more about the best fuel to use.

Troy-Bilt Chainsaw with Clogged Fuel Filter

The job of a fuel filter is to trap debris and other pollutants before they enter the fuel supply. The fuel filter for your Troy-Bilt chainsaw is located inside the gasoline tank.

It’s a little cylinder-shaped component that’s connected to the gas supply. The filter might become clogged with grime if it isn’t changed frequently. The gasoline filter’s flow rate will be decreased as a result.

Choking the chainsaw’s air intake can adjust the air-to-gas ratio and keep it running when there isn’t enough gas to combine with the air.

Before replacing the gasoline filter, wipe the area around the fuel cap with a clean cloth to keep debris from dropping into the tank. You need to remove the fuel filter from the tank. A straightened wire or a pair of needle-nose pliers can do the trick.

Remove the old Troy-Bilt filter from the gasoline line and replace it with a new one. Return the filter to its original position in the gasoline tank’s front right corner. The gasoline cap should be replaced.

Troy-Bilt Chainsaw Fuel Line Leak or Clog

If there’s a blockage in the fuel line that’s preventing fuel from flowing, or if air is getting into the fuel system through a puncture in the fuel line, you may need to turn the choke on.

If there is a blockage in the gasoline line, it must be cleared. In order to accomplish this, the chainsaw’s fuel line must be disconnected. To remove the obstruction, carburetor cleaner should be sprayed into the line. After that, you can try blowing compressed air into the line to see if that helps clear it out.

Once you’ve cleared the line of the obstruction, you should put it back in place. If the gasoline line is dry and cracked and you are unable to access it, you should get a new one.

Check for a hole in the line that would allow air to enter the fuel system and cause the cylinder to receive an excessive amount of air, necessitating the use of the choke to reduce the volume of air entering the cylinder.

Blocking a Troy-Bilt Chainsaw’s Fuel Ventage

A Troy-Bilt chainsaw has a tiny, round air vent. The fuel tank requires this vent so that air can enter during fuel consumption and exit during fuel refueling.

If the gasoline tank is unable to vent, a vacuum will create, preventing fuel from escaping. The gasoline flow to the carburetor will be cut back as a result.

Set the saw on a flat surface, turn it on, and then let the choke out to see if the fuel tank vent is blocked. If it starts running poorly, you can fix it by letting air into the gasoline tank by taking the top off or loosening it.

The engine will function normally once air can enter the tank. You can try to recreate the problem where the engine begins to run sluggishly and possibly shut off by replacing and tightening the fuel cap while letting the saw continue to operate.

Remove the obstruction from the fuel tank’s vent and replace it. A breather is a little piece often located on the top of the gasoline tank in front of the handle on most Troy-Bilt chainsaws.

Broken Carburetor Gasket on a Troy-Bilt Chainsaw

When the gasket behind the carburetor deteriorates, it no longer forms a tight seal, enabling air to enter the system.

When there is more air than gasoline in the cylinder, the engine in a Troy-Bilt becomes unbalanced and begins to run lean. When the choke is on, airflow is reduced to make up for the increased intake caused by the leaky gasket.

The carburetor’s connections and bolts must be removed before you can have access to it. Taking out the gasket and carburetor. Replace the gasket on the carburetor.

Check the carburetor before putting it in. With the chainsaw apart, you could give it a good cleaning.

Troy-Bilt Chainsaw with a Filthy Carburetor

To get your Troy-Bilt chainsaw started and running, you need to adjust the carburetor’s fuel-to-air ratio. Varnish and deposits can prevent the carburetor from functioning properly.

You can likely clean your carburetor on your own if you have a basic understanding of mechanics. Remove deposits from old fuel by disassembling the carburetor and cleaning it using carburetor cleanser.

Cleaning the carburetor is only the first step; if it still doesn’t work, you may need to have it rebuilt or get a new one.

Troy-Bilt Chainsaw Carburetor Requires Fine-Tuning

You may need to make some adjustments to the carburetor in order to get the desired range of RPMs between idle and wide open. Perhaps it’s making the engine run too lean and requiring the use of the choke.

In order to modify the engine’s RPMs at both idle and full throttle, the carburetor might need to be tweaked. The carburetor features a set of adjustment screws for just such a purpose.

The screws are differentiated into two categories: low and high speed. Adjust the chainsaw’s low-speed screw clockwise and counterclockwise until it produces a smooth, non-sluggish idle.

The next step is to fine-tune the “H” so that maximum RPM is achieved with minimal jerkiness. Don’t let the RPMs get too high or you could end up damaging the engine.

The carburetor on a Troy-Bilt has a limited range of motion that prevents fine-tuning. Carburetor adjustments for your Troy-Bilt chainsaw may call for specialized equipment.

Visit your neighborhood Troy-Bilt service center if your machine’s carburetor is giving you trouble.