How to Pump Gas Out of a Boat Gas Tank?

Last Updated on October 5, 2022

It’s summertime and you’re out on the boat enjoying the warm weather. But then you realize that you’re running low on gas. What do you do?

You can’t just go to a gas station and fill up your tank, you have to pump the gas out of the boat’s gas tank. There are a few different ways to pump the gas out of a boat gas tank, but one of the most common is to use an air compressor.

So, if you are looking for information on how to pump gas out of your boat gas tank, you have come to the right place! Thanks for reading!

How to Drain Fuel Tank on Your Boat?

  • Open the gas cap on the boat’s gas tank.
  • Insert the end of a garden hose into the gas tank.
  • Put the other end of the hose in a bucket or container.
  • Turn on the water at a low setting and allow it to run into the hose and into the bucket for about 15 minutes.
  • Shut off the water and remove the hose from both ends.

How to Drain Underfloor Fuel Tank?

If your underfloor fuel tank is anything like ours, then it’s probably in need of good draining! 

Here’s how to do it:

Step 1: First, locate the drain plug on the bottom of the tank. If you can’t find it, consult your owner’s manual. 

Step 2: Next, place a large container underneath the drain plug to catch any fuel that may drip out. 

Step 3: Now, using a wrench or pliers, loosen the drain plug and allow the fuel to drain into the container.

Step 4: Once the fuel has finished draining, replace the drain plug and tighten it securely. 

Step 5: Finally, dispose of any fuel that you drained off in an appropriate manner, don’t just pour it down the drain!

How to Clean Boat Gas Tank Without Removing?

Assuming you have a boat with an inboard gas tank and you cannot remove the gas tank from the boat, here are some tips on how to clean it. 

First, run some fresh water through the system to flush out any salt water that may be in there.

Then, using a garden hose, fill the tank with a mixture of 1 part bleach to 10 parts water. Let this mixture sit in the tank for at least two hours, then flush it out completely with fresh water. 

Once the tank is empty, mix up another batch of 1 part bleach to 10 parts water and use a brush or sponge to scrub down the inside of the tank, getting rid of any dirt or debris. Rinse well with fresh water and let dry completely before adding new fuel.

Additive to Remove Water from Boat Gas Tank

If you’ve ever had your boat’s gas tank get water in it, you know what a pain it can be. The last thing you want to do is have to drain the entire tank and start over again. Luckily, there’s an additive that can help remove water from your boat’s gas tank.

This additive is called “Gas-Dry” and it’s specifically designed to remove water from fuel tanks. It works by causing the water to bind with the additive, which then separates it from the gasoline. 

This makes it much easier to drain the water out of the tank without having to empty the entire thing. To use Gas-Dry, simply add it to your fuel tank according to the directions on the bottle. Then run your engine for a few minutes so that the additive can circulate through the system. 

After that, you should be able to drain the water out of your tank without any problems. If you have a boat with an inboard engine, you’ll need to take some extra steps when using Gas-Dry. Since these engines are sealed, you won’t be able to circulate the additive through them like you would with an outboard engine. 

Instead, you’ll need to remove the spark plugs and pour a small amount of Gas-Dry into each cylinder. Replace the plugs and turn on the engine for a few seconds so that the additive can mix with the gasoline. 

How to Drain Gas from Mercury Outboard Motor?

If you need to drain the gas from your Mercury outboard motor, here’s how to do it. 

First, open the engine cover and locate the fuel line. 

Next, use a wrench to disconnect the fuel line from the engine.

Finally, Once disconnected, place a catch pan under the fuel line and open the valve to release the gas. Allow all of the gas to drain into the pan before closing the valve and reconnecting the fuel line.

How to Clean Plastic Boat Gas Tank?

If you have a plastic boat gas tank, it’s important to clean it regularly to prevent the buildup of grime and debris. 

Here’s how to clean your tank: 

1. Remove the gas cap and any other accessories that are attached to the tank.

2. Rinse the outside of the tank with fresh water. 

3. Mix up a cleaning solution of mild soap and water, and use this to scrub the inside of the tank. A soft brush can be helpful for getting into all the nooks and crannies.

4. Rinse out the tank thoroughly with fresh water when you’re done scrubbing. 

5. Allow the tank to dry completely before replacing the gas cap and reattaching any accessories.

How Do You Get Gas Out of a Boat Tank?

Whether it’s from condensation, bad fuel, or simply forgetting to add a stabilizer to the gas, getting water in your boat’s gas tank is a problem that can cause serious engine damage. So how do you get rid of the water and get your boat back on the water?

The first step is to remove the gas cap and check the inside of the cap for moisture. If there is any moisture present, it’s likely that water has made its way into the tank. 

Next, take a look at your fuel line. If there is any moisture present in the line, it needs to be replaced immediately. Once you’ve checked for moisture, it’s time to start siphoning out the water from your tank. 

The easiest way to do this is with a simple hand-operated pump. Simply insert the pump into the tank and begin pumping until all of the water has been removed. 

If you don’t have a hand pump, you can also use a shop vac to remove the water from your tank. Just make sure that you don’t turn on the shop vac until after you’ve removed all of the gasoline from your boat! Otherwise, you risk igniting any fumes that may still be present in the tank. 

Once all of the water has been removed from your tank, it’s time to add fresh gasoline (with a stabilizer) and get back out on those waves!

How Do You Pump Out Gas?

Assuming you mean “How do you pump gasoline into a car?” Before you start pumping gas, make sure your car is turned off. Once it’s off, lift up the handle on the gas pump to open it and insert the nozzle into your car’s gas tank.

The nozzle will only fit one way, so don’t force it. If it doesn’t click when you insert it, pull it out and try again. Once the nozzle is inserted, squeeze the trigger to release the gas.

The pump will automatically shut off when your tank is full, but if you want to stop before that, just release the trigger. Be careful not to overfill, if gasoline spills out of the tank while you’re pumping, stop immediately and clean up any spilled gasoline with a rag.


Conclusion paragraph: So there you have it! The three foolproof ways to get the gas out of your boat gas tank. 

Now that you know how to do it, don’t wait any longer; go ahead and give one of these methods a try. 

And if you still find yourself struggling, or if you have any other questions about pumping gas out of a boat gas tank, feel free to reach out to us. We’re always happy to help!