Where to Spray Starter Fluid on Lawn Mower?

Are you struggling to make your Lawn Mower work after a few months, but it doesn’t start immediately? The best way is to start it by using Starter fluid or oil. The mower will start after spraying the fluid, but the problem is with the engine if it doesn’t start. The few reasons your lawn mower starts later are that it may be too old, exposed to cold weather, etc. You can read this article about the starting fluid to learn more about it and where to spray it.

What is a Starter Fluid?

Basic tools for spraying a starter fluid

Starter fluid is a liquid used to start a machine or vehicle in abnormal conditions. This fluid is a highly explosive chemical and is only for external uses.

The application of this liquid is easy because it commonly comes in spray form, and it works effectively only with small amounts.

You can spray this chemical on old machines and vehicles in cold conditions for too long, or handle any problem with the ignition system, etc.

This liquid has diethyl ether and other volatile hydrocarbons like heptane and carbon dioxide.

When to use Starter Fluid?

What is a Starter Fluid

You must be careful while using this starter fluid spray because it is highly combustible and explosive compared to diesel or gasoline. Because of this, it lights up fast with small amounts and starts the engine easily.

Use this fluid when you have tried other options to start the engine, and it didn’t work. Take a small amount of the fluid and spray it on the engines before starting it. This article has details on where to spray this fluid for a lawnmower.

Basic tools for spraying a starter fluid:

Gathering some basic tools before spraying the starter fluid on the lawnmower. They are,

  • Wrench set
  • Cloth
  • Screwdriver
  • Pilers
  • Collector pan
  • Starting fluid or oil

Steps for spraying the starter fluid:

Follow a few steps to spray the starter fluid on the lawnmower. They are,

air filter

The first step is to find the air filter on the lawnmower. The air filter will be near the engine, like the top or side of the engine. For a riding mower, you need to lift its hood and raise the cover if it is a pushing mower.

There are some bolts for the pushing one; you have to remove the bolts and release the claps on the body. Open the filter, and you can see a black box, a house of engines, and other parts.


Now you must be careful while removing the air filter because it is made of plastic. Use a socket wrench to unfasten the engines seen in some machines.

Most air filters are also made of paper and foam; some are hybrid. They are typically fragile and need care while removing and cleaning them. Removing the air filter and using a torque wrench to unbolt it is easy.


Clean the air filter, a foam filter is very easy to clean, but it is challenging to clean a paper filter. A foam filter is reusable four times after cleaning, but replacing the paper filter is advisable.

Use a soap or detergent to clean the foam filter and let it dry after washing it. Please wait until it is completely dry, and apply oil to trap the debris.

When to use Starter Fluid

The next step is locating the carburetor, typically behind the air filter. You can see the carburetor top or side of the air filter help with many bolts.

Please take out the carburetor and clean it to start the engine effectively. Take some carburetor spray and spray on it, and clean it with a clean cloth.


Now, locate the breather tube and find the opening where the air enters the carburetor. With a 20 cm distance, aim the spryer to the opening and spray a small amount of the starter fluid.


Then, you have to adjust the engine’s speed to medium if it is adjustable. Then lift the choke to the full choke before starting.


The final step is to start the engine by pulling the string or turning on the ignition. If the engine starts in 3 seconds, it is okay; if it doesn’t, there is a problem with the carburetor and fluid. The problem is that the carburetor stops after three seconds, and you must replace it.

If there is a stalling, then empty and clean the carburetor. Use another fluid to start the engine again.

Safety tips:

Starter Oil

Some safety measures to follow while spraying the state fluid because it is highly flammable and needs a lot of care.

  • Use your goggles and hand gloves to protect yourself from the fluid.
  • Wash your eyes cleanly if any content falls in your eyes.
  • Please do not start the engine. It is hot and burning because it is explosive.
  • Always do the process of spraying the fluid in an airy space because you should not breathe the content as they are very dangerous.
  • For safety, always keep a fire extinguisher near you.


A lawnmower stops working after a few uses and even because of exposure to the cold weather. The easiest way to start the engine is by spraying the starter fluid. The fluid is highly flammable and starts the fire because it has materials like diethyl ether and other volatile hydrocarbons like heptane and carbon dioxide. You should follow a few steps to spray the fluid, which are given in the article.


Does every lawn mower need starter fluid?

The fluid starts the engine if the lawnmower stops working.

Is it safe to spray the starting fluid on the carburetor?

Spraying the starting fluid into the carburetor is safe, but you must carefully handle it.

What is the main purpose of a starting fluid?

The starting fluid combines many chemicals to start the engine if it stops working.

Is starting fluidly flammable?

The starting fluid is made of many explosive chemicals, and it is highly flammable.

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