How to Flash a Generator Using Drill and Battery Methods

Sometimes generators stop producing power even if they are running when we don’t use them for a lengthy amount of time.

In that case, we flash the generator by manually applying mechanical force or electrical force to it. It is like restarting the machine.

Flashing a generator refers to the process of updating its firmware or software. This can help fix any bugs or errors that may be causing the generator to malfunction.

So in this article, we have told you “how to flash a generator” using the drill method, and 12V battery methods. We have also covered why your generator is not producing any power.

Why My Generator Doesn’t Produce Power Even It is running?

The main reason your generator doesn’t produce power is the loss of residual magnetism. The magnetic field is created by borrowing some of the generator’s output voltage which is later converted into DC and fed into a coil to make an electromagnet.

Residual magnetism is the leftover magnetic field from the last time generator was used. This leftover magnetism is used to create a strong magnetic field when you start the generator. Check this research on the magnetic field if you want to learn more about the topic.

The following problems can also be the reason your generator isn’t producing any power.

  • Problems with the fuel supply
  • Faulty air filter
  • Low oil-levels
  • Dead battery
  • Faulty spark plug
  • Defected voltage regulator
  • Faulty alternator

How to Flash a Generator with a Battery?

Flashing a generator with a battery typically involves the following steps:

  1. Locate the voltage regulator. Normally, it is on the bottom left-hand side of the generator.
  2. Disconnect the wires from the generator brushes. Those will be red and black/white.
  3. Make sure the generator is turned off and unplugged from any power source.
  4. Turn on the generator and allow it to run for a few minutes to charge the battery.
  5. Connect the battery to the generator by attaching the red cable to the positive terminal and the black cable to the negative terminal. It should just be a small tap. Tap it again if the generator fails to start generating.
  6. Use a voltage meter to check the battery voltage to ensure it has reached the proper charging level.
  7. Disconnect the battery from the generator once it is fully charged.

Please note that this is a general process and the steps may vary depending on the generator and battery model you are using.

It is also important to ensure that the battery is the correct type and size for your generator and that the generator is rated to charge batteries.

How to Flash a Generator with a Drill?

Flashing a generator with a drill typically refers to the process of using a drill to spin the flywheel of a generator to start it.

This method is often used as a backup starting method if the generator’s standard electric starter is not working.

The process typically involves the following steps:

  1. Take a ½” corded drill. The drill should have permanent magnets otherwise the method won’t work.
  2. Make sure the generator is turned off and unplugged from any power source.
  3. Locate the flywheel on the generator. This is typically a large, circular metal disc that is connected to the crankshaft of the engine.
  4. Insert the chuck of the drill into the center of the flywheel. Make sure the drill is securely attached to the flywheel.
  5. Now twist the chuck backward by sticking something to it because we will be sending electricity back into the generator to make it excited enough to start producing electricity.
  6. Turn on the drill and allow it to spin the flywheel for a few seconds.
  7. Turn off the drill and pull it away from the generator.
  8. Turn on the generator and allow it to run for a few minutes to ensure it starts properly.

Please note that this process may vary depending on the model of the generator you are using.

It is also important to use caution when performing this process as the flywheel can spin very quickly and can cause injury if not handled properly.

The drilling method doesn’t always work but the battery method works 9 out of 10 times. You should give the battery a try before the other one.

Frequently Asked Questions (FAQs)

What is flashing a generator?

Flashing a generator refers to the process of restarting the generator by manually feeding mechanical or electrical force into it, or updating the firmware or software that controls the generator’s operations.

How do I know if my generator needs to be flashed?

Your generator will stop producing power even if it is running and everything including the fuel line, air filter, outlets, AVR, and capacitor looks alright. Consult the owner’s manual or contact the manufacturer to see if there are any firmware updates available for your generator.

Can I flash a generator myself or do I need a professional?

The answer depends on the generator model and your technical expertise. Some generators have user-friendly interfaces that allow for easy flashing, while others may require specialized knowledge and equipment. It’s always better to follow the manufacturer’s recommendations and if you are not sure, seek professional help.

What are the risks of flashing a generator?

Flashing a generator can be risky if not done properly. If the firmware update is not compatible with your generator or if the flashing process is interrupted, it can cause the generator to malfunction or fail completely. Additionally, if you are not sure of what you are doing, you can cause permanent damage to the generator or create a safety hazard.



Fareed, the highly skilled electrical expert, boasts 5 years of extensive experience in proficiently maintaining, repairing, diagnosing, and installing a diverse range of electrical systems.

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