How to Drain Gas from a Lawn Mower (3 Methods)

There may come a time when you need to remove gasoline from your lawn mower, and you’re going to need an easy and safe method. It’s not as easy as simply picking up the mower and pouring the gasoline out. So, I’ve put together my three favorite ways to get gas out of a mower that you can use for big zero-turns, small walk-behinds, and everything in between.

How to drain the gas from your lawnmower

First, let’s take a look at why you might need to remove gasoline from your lawn mower. These are common everyday events. One or two of these might be familiar to you.

  • Fuel that has gone bad and is no longer good. Your tank is full of gasoline that has gone bad. It is urgent that you get rid of it.
  • Service. It is easier to service the lawn mower’s fuel system if you take out the gas.
  • You accidentally used the wrong gasoline. You accidentally used the wrong gasoline for your mower.
  • Transporting the lawnmower. If the mower needs to be transported in an enclosed vehicle, then it’s much safer to remove the fuel.

How to drain gas from a lawn mower This is my go to method

A pump is my preferred method to remove gas from my mower. I like it because it’s quick, easy, and of course, safe. It’s also the method that requires the fewest tools and has the simplest approach. So, here’s my go-to method to pump out the gasoline from a mower.

Equipment to remove the fuel from a lawnmower using a transfer pump

  • Spare Fuel Container
  • Fuel Transfer Pump
  • Cleaning Rag
  • Gloves
  • Protective eyewear

Preparing for the Area

The environment should be safe when handling fuel. You must ensure that there are no dangers. You should not allow any open flames to be near the area, or allow your grandchildren to run around.

Preparing for your Self

To accomplish this, I wear lightweight, protective eyewear and thin rubber hands. Gasoline isn’t too bad when you get it on your skin, but it’s not fun if you get it in your eyes. A little bit can go a long distance with PPE.

Grab a spare fuel container

You’re going to need a spare fuel can to hold the gasoline pumped out of the lawn mower. This can should be able to transport the gasoline and be one that you are willing to use again.

Position the Gas Can

Next, you want to position the gas can close enough to the mower so that the transfer pump can reach it—a simple step but essential all the same.

Position the Transfer Pump

Transfer pumps work only in one direction: inflow or outflow. If you get the pump in the wrong way around, you’ll be filling the lawn mowers fuel tank, not emptying it. Check the direction markers on the pump. These are usually arrows that indicate the direction. Then put the inflow end in the mower’s tank and the outflow in the spare fuel can.

Start the Transfer Pump

Once everything is in order, you can start the pumping process. It is important to keep the pump in your hand and ensure that both ends are in the correct places. I use the mower as a vacuum once it starts to pump.

The pump should be able to pull all junk from the mower tank into its spare fuel can. Make sure the pipe is not drained to the bottom of the fuel tank. This will allow you to get rid of any gasoline.

Cleaning up

Once the tank is empty, disconnect the circuit board from the pump and turn it on. Before you put it away make sure that the tank is completely empty of gasoline. Next, clean up the area using a cloth. Make sure you don’t leave any spilled gasoline in your work area or on the mower.

Two Other Ways to Get Gas from Your Lawn Mower

If using a transfer pump isn’t something that you want to give a go, then here are two other methods you can try instead. The first method is siphoning from the top of the fuel tank, and the second is draining from the fuel tank’s bottom outlet.

You are sabotaging your fuel tank

Siphoning fuel tanks can be used to remove fuel from the top. Although it is more laborious, this one ranks second on my list. The process here is very much the same as pumping; instead, this time, you’ll swap out the pump for a siphon.

Siphoning is dependent upon gravity, so it is a good idea to have your mower high up. The mower should be higher than the spare fuel can. This will make the transfer faster.

Siphon to remove gasoline from lawnmowers

  • Spare Fuel Container
  • Fuel Siphon
  • Cleaning Rag
  • Gloves
  • Protective eyewear

Draining your fuel tank

Your mower’s filler cap might have a safety feature that makes it difficult to get into the tank. What should you do if your mower’s filler cap has a safety device that makes getting into the fuel tank difficult? Well, you’ll need to drain the tank via the fuel tank’s outlet.

Removing the fuel line from the fuel system allows the mower’s tank to drain. This is a great method to remove any grime from your tank. Simply connect a separate fuel supply cable to your fuel system, then connect it the spare tank. As long as you connect the fuel tank and the fuel pump, you’ll be able to drain the tank.

Equipment to Remove Fuel from a Lawn Mower using the Tank’s Outlet

  • Spare Fuel Container
  • Pliers
  • Spare Fuel line
  • Cleaning Rag
  • Gloves
  • Protective eyewear

Staying Safe While Draining Gas from Your Mower + Mistakes to Avoid

You need to be extremely careful when handling gasoline as it’s highly flammable and hazardous to you and the environment. You must also consider where you will dispose of gasoline. You can call your local city office to get the information you need to safely dispose of your gasoline. These items must be prepared before you drain fuel from your lawnmower.

  • Fuel disposal location
  • PPE – Eyewear
  • PPE – Gloves
  • Fuel Containers
  • Fuel-friendly Pumps/Siphons

Here are some tips for making your lawn mower a success.

  • Continue siphoning. Do not break the siphon, as it is almost impossible to start it with very little fuel.
  • If the spare fuel contains a bad fuel, it could be contaminated.
  • If you intend to drain the fuel system you will need spare fuel line. You will also need to replace damaged fuel lines.

How to Drain Gas from a Lawn Mower (3 Methods)

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