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9 Steps on How to Remove Gas from Boat Fuel Tank?- Regular Boat Maintenance

Remove Gas from Boat Fuel Tank

It can be very alarming when you are out there with your outboard. And your engine suddenly runs erratically and makes noise. It can be because of air bubbles in the fuel tank.

So, how to remove gas from boat fuel tank?

Well, removing the gas from the fuel tank can be an easy job for you. Firstly, you will need to deplete the fuel supply to the engine. Then take the boat to a suitable place. Place a hose between the fuel transfer bulb and fuel receptacle and tank. The fuel must then be drained.

You must be still pretty much blurry about that matter. Don’t worry, this entire article is only intended to clear your mind.

So, let’s jump on to the details discussion about that matter.

Reasons to Drain Your Fuel Tank


One of the most important aspects of maintaining your boat is keeping it safe. One of the ways to do this is by regularly draining your boat’s fuel tank.

Cleaning your fuel tank should be a regular part of your maintenance routine. A dirty fuel tank filled with sludge can result in engine problems in the long term. The fuel in your tank will break down into chemicals over time, and additives will sink to the bottom of the fuel tank, creating a thick sludge. To avoid this, make sure to clean your fuel tank regularly.

Boat fuel can go stale within 30 days, especially if it’s mixed with ethanol, as it is in some areas. Stale fuel will degrade and can clog the fuel system. It’s better to consider draining your boat fuel tank when you’re leaving your boat for long periods.

Another reason to empty your fuel tank is for winter storage. Emptying the fuel tank will ensure that you don’t end up with stale fuel that damages and corrodes your fuel tank.

If there’s water in your fuel tank, then you want to make sure to drain and replace the fuel in your boat tank. Water can seriously damage your engine by washing away any lubrication. It can also cause corrosion and long-term damage.

Boating safety is an ongoing initiative, and by draining your fuel tank, you can maintain and clean out the tank. This will keep your engine and your boat safe from damage or worse. By taking these simple steps, you can keep your boat safe, and ensure that it lasts you for decades to come.

Of course, if you don’t want the hassle of maintaining a boat, you can have access to a boat of your choice with a Freedom Boat Club membership. The club takes care of maintenance and cleaning, and you get to enjoy the water without worrying about the hassles of boat ownership.

In conclusion, draining your boat’s fuel tank is an essential part of boat maintenance that should not be overlooked. It will help keep your boat safe, prevent engine problems, and extend the life of your boat. By taking care of your boat now, you’ll ensure that it’ll last for years to come.

9 Simple Steps for Removing Gas from a Boat Fuel Tank

drain fuel

Is your boat’s past season just around the corner? Are you worried about the accumulation of residue in your fuel tank?

The air bubbles in a fuel tank are properly ventilated. Air pockets in a fuel system can cause halting, dry retching. Or rejection to start if this is not done. Its kind of similar to bad trigger symptoms.

Some trapped air may cause an airlock in the fuel pumps, causing the engine to run erratically or even stop. Furthermore, friction can cause the fuel pumps to overheat.

There are multiple reasons why you should regularly flush your fuel tank. You can effectively do it yourself to save money. All you need to know is how to drain gas from the boat fuel tank in a step-by-step process.

If your fuel tank is in danger of being damaged, this procedure will save you money on professional fees and repairs. Knowing how to drain the fuel tank on your boat is a skill you didn’t realize you needed.

It is risky to drain the gas from your fuel system. If not done correctly, it has the potential to start a fire. Having these components on hand will drastically decrease the number of collisions.

You will also need some safety precautions in addition to protecting your fuel tank from potential damage. Some tools as well as step-by-step instructions to keep yourself safe throughout the procedure.

Tools you will need


Don’t worry, removing gas from the boat fuel tank is an easy task. And you don’t need to pay a sack of dollars to buy any machinery. The thing in your toolbox might do the work just fine.

Or you might need to buy a thing or two from your closest auto parts store. Here’s what you will need.

  • Flathead screwdriver
  • Fuel hose
  • Fuel transfer bulb or Primer bulb
  • Hose clamp
  • Fuel receptacle
  • Work gloves
  • Protective gear

These tools might be just enough for you to get the job done. But, obviously, you could use some stage process instructions.

Here I have briefly described some step-by-step guidelines for you to follow.

Step 01: Race the boat into the water

To begin, lower the boat into the water. This will deplete the motor’s supply line. However, do not burn all of the fuel inside the engine. It may cause troubleshooting of transmission.

You must keep 1/8 of the gas in the tank. A water muff is another option for this step. Connect a hose to the fluid intake of your boat engine to dehydrate it.  And flush in water to avoid harming the engine. Turn on the water tap once the hose is connected. Then place the vehicle in neutral and start the motor.

Step 02: Park the Boat In a Level Area

Once the running is complete, shut off the engine and depart the water. You can load it onto a trailer and transport it to a level area.

Step 03: Wear Protective Garments

When you arrive at your preferred site, you must put on protective clothing such as rubber gloves, a mask, and eye protection.

Step 04: Connect the Pipe to Either Primer Bulb or the Fuel Transfer Bulb

fuel remove

When you complete this step, two things can happen. Attach the hose directly to the fuel transfer bulb.

In some cases, however, a connector may be required. It’s as simple as stiffening the hose buckle on the side of the primer bulb. Even so, a screwdriver may be necessary.

When connecting the other end of the hose to the template or fuel transfer bulbs, protect the lock with a screwdriver.

There are so many fuel transfer bulbs in the market. Some are labeled, while others are not. Choosing one can be quite perplexing.

Step 05: Connect the Pipe Line to the Fuel Receptacle

Connect the other end of the nozzle to the fuel container after linking it to the compressor. It allows the boat to collect the drainage from the fuel tank.

Step 06: Connect the Hose to the Fuel Tank

Disable the tank’s cap and check that the hose reaches the container’s bottom.

Step 07: Empty the Tank

This is the section where you configure everything. You can choose a fuel transfer bulb to switch it on, and poof! It is self-contained.

Squeeze the template bulb firmly to enhance draining. Then you must keep pressing until all of the fuel has been ejected.

Step 08: Clean the Tank

clean tank

Following the oil tank’s emptying. You can even use the compressor as a suction to suck in the dirt, residue, and other undesirable particles. You must be thorough because some things may surprise you.

A hot pressure washer would be ideal for cleaning any hard-to-reach areas. When draining the tank, first disconnect the lines.

After deep cleaning is complete, refill your tank with rubbing alcohol or seafoam tidier. Any of these substances have the potential to break up the residue.

After removing any unnecessary elements, you can allow fresh air into the fuel tank for a short period of time. Draining the fuel will be easier in the future if you spend some time cleaning up the tank.

Step 09: Set Everything as Before

Close the tank and remove the hose after you’ve drained the fuel from your boat. You must be in charge of gas disposal and aftercare. After that, you can return the boat to its trailer and store it.


Remove Gas from Boat Fuel Tank faq

Is the fuel tank equipped with a drain plug?

There is no drain plug on the cylinders. The most effective method of draining the fuel is to disconnect the nozzle from the filter, which is typically located on the motorist’s side of the frame just ahead of the fuel tank.

Is it able to integrate vintage and modern gas?

If the gas is properly stored, it retains its full combustibility. They believe it is acceptable to mix old and new grassed-up vehicles. They do, however, recommend that drivers mix them in the proper proportions.

Is 2-year-old gasoline still safe to use?

No, a gas that is more than a year old can be harmful to the engine. This can cause motor banging, sputtering, and blocked-up injectors. Over two months old gas is relatively safe to use, with only slight framerate drops.

How do you get gas out of a gas tank without removing it?

It is possible to remove gas from a gas tank without removing the tank itself. Here are a few methods to consider:

  1. Siphoning: One of the most common ways to remove gas from a gas tank without removing the tank is to siphon the gas out using a siphoning tool. This tool usually consists of a long tube with a hand pump or squeeze bulb. You’ll need to insert one end of the tube into the gas tank and the other end into a gas can or other container. Pump the siphon tool until the gas starts to flow, and continue until you’ve removed as much gas as you need.
  2. Drain plug: Some gas tanks have a drain plug at the bottom, which can be removed to let the gas drain out. This method is typically used on smaller engines, such as lawnmowers and motorcycles.
  3. Electric pump: If you have access to an electric pump, you can use it to remove gas from the tank. Attach one end of a hose to the pump and insert the other end into the gas tank. Turn on the pump, and the gas will flow out of the tank and into a container.

It’s important to note that removing gas from a tank can be dangerous, and it’s crucial to take the necessary safety precautions. Always work in a well-ventilated area, wear appropriate protective gear, and be mindful of any ignition sources. Additionally, be sure to dispose of the gas properly and in accordance with local regulations.

Bottom Line

Thanks a lot for tagging with me till the very end. Hope you are clear about the matter of how to remove gas from the boat fuel tank.

If you find any hassle with the whole process feel free to call a professional to do the job.

Best of luck.

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