Are you keen on crafting a flamethrower to dazzle your buddies? Feeling utterly bored? Crafting flamethrowers can be surprisingly straightforward and call for minimal tools (at least for the basic, albeit more hazardous versions). Peruse the steps below for guidelines on creating 3 distinct flamethrowers, each boasting a different level of intensity. Some might prove trickier to fabricate than others.
Let's face it for a moment: These contraptions are extremely perilous. You're embarking on this at your own peril. Let's steer clear of earning any Darwin Awards, shall we?
Guidelines
Lighter (Minimal Flame)

Procure a lighter. You can snag one from most convenience stores.

Remove the casing. It should snap off or be pulled off, but you can also utilize pliers if needed.

Fine-tune the dial. Rotate the dial all the way towards the plus sign (typically on the right).

Revert it to its original position. Raise the tab so it doesn't make contact with the dial, then turn the tab completely back to the left.

Place it down and repeat the process. You can perform this action multiple times to maximize the output.

Switch it on. Exercise caution. Expect a flame of at least 3 inches. You can readjust as needed.

Enhance the flame size. Elevate it by spraying WD-40 or engine degreaser towards the flame. Maintain a safe distance from your body and other individuals, as well as flammable objects. This will produce a significant flame.
Can (Moderate Flame)
Secure rubber bands. Place two rubber bands around an aerosol can.
- You can utilize a can of Axe, hairspray, or any similar product.

Attach the holder. Position the wall bracket (already bent into a 90-degree angle) beneath the rubber bands to securely hold the can in place.

Prepare a sticky base. Break off a portion of plasti-tak and affix it to the bottom of the candle (alternatively, you can use a lighter).
- Alternatively, chewing gum can be used.

Fix it onto the holder. Affix the candle onto the wall bracket using plasti-tak or another adhesive substance.

Fine-tune as needed. Align the candle wick with the sprayer nozzle on the aerosol can.

Ignite the candle. Exercise caution.

Release the spray. Avoid spraying towards anything combustible. Exercise caution.
Super Soaker (Ultimate Flame)

Acquire a top-notch water pistol. Ensure it has excellent pressure-building and maintaining capabilities, is crafted from high-quality plastic, and can hold a substantial amount of liquid.

Procure a metal holder. You'll require a metal holder, either flat or an L bracket depending on the type of gun you purchase. Affix the holder to the gun so that the flat metal extends parallel to the ground, approximately 1' below the nozzle.

Wrap the pistol. Cover the pistol around the nozzle with aluminum foil, leaving only the opening exposed (and minimizing exposure as much as possible). This will aid in preventing the pistol from melting.

Load the pistol. Fill the water reservoir with lighter fluid.

Attach a candle. Fix a candle onto the end of the holder. You can use adhesive tack, gum, or any substance other than glue.

Ignite the candle. Light the candle using your preferred lighting method.

Fire the pistol. Remember to pump it beforehand.
Pointers
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If the flame frequently extinguishes, adjust the candle slightly downward.
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Avoid using glue, as you'll likely want to replace the candle once it burns out.
Cautions
Consider performing this activity outdoors.
When outdoors (which is recommended), shoot it in the direction of the wind. Firing into the wind may cause the flame to blow backward.
If the nozzle ignites, extinguish it and wipe it clean.
Exercise extreme caution.
Necessary Items
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An aerosol can containing a flammable substance. (e.g., Hot Shot wasp and hornet killer)
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Two rubber bands
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A small wall bracket bent at a 90-degree angle (if possible)
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Plasti-tak
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A sturdy match or a birthday candle