How to Fix a Damaged Plastic Gas Tank on Lawn Mower

A gas leak can be one of the most dangerous things for your lawn mower. If you are tired of buying new plastic gas tanks, it is time to learn how to fix a damaged plastic gas tank on your lawnmower! This step-by-step guide will show how easy it is to replace that broken or cracked fuel tank with one from the hardware store.

How to Fix a Damaged Plastic Gas Tank on Lawn Mower

Materials Required:

The following materials will be required to assist you in fixing the plastic gas tank efficiently and successfully:

  • Soldering iron
  • Hacksaw
  • Screwdriver
  • Safety goggles
  • Protection gloves
  • Sandpaper

Step 1: Remove all the fuel out of the gas tank.

The first thing you need to do is remove all the gasoline from your lawn mower gas tank. To drain out this fuel, turn off your engine or disconnect it from the spark plug so that there are no chances of fire getting ignited. Next, open up the cap located at the bottom of your plastic gas tank and let all of it run out.

Step 2: Cut the plastic gas tank with a hacksaw.

Once all of the fuel has been drained out, you can use your hack saw to cut through one side of your lawn mower’s plastic gas tank. To make this process simpler and easier for yourself; identify the mid point of how wide or how tall this tank is and start cutting from there. Be careful while doing this as you do not want to damage the other half of your gas tank in any way.

Step 3: Remove the damaged plastic gas tank.

Once you have successfully cut the tank in two, use a screwdriver to pry open the top section of the tank. Now you can remove the damaged plastic gas tank completely from your lawn mower.

Step 4: Clean up the area where you removed the old plastic gas tank.

Use a rag to wipe off any excess fuel that is still present on this spot and then clean it thoroughly with some water as well. You do not want anything left behind such as dirt, debris or rust as it will further damage your lawn mower if they are not removed completely.

Step 5: Apply flux to the area where you have cut open the plastic gas tank.

After cleaning up this spot with water and making sure that all traces of dirt or oil or corrosion is gone; now apply some flux onto how you have cut open the plastic gas tank. This will help in soldering the new plastic gas tank securely in place.

Step 6: Solder the new plastic gas tank to the lawn mower.

Now that you have everything ready, it is time to start soldering the new plastic gas tank in place. Use your soldering iron to heat up the metal and then apply solder to it. Once the solder has melted, quickly press the new plastic gas tank in place and hold it there until it cools down. If everything goes according to plan, you will now have a securely fixed gas tank on your lawn mower!


If you follow these simple steps, you can easily fix a damaged plastic gas tank on your lawn mower. It is a cheap and easy solution that will save you from having to buy a new one altogether. So, next time your tank cracks or leaks; don’t panic! Just follow these simple instructions and you’ll be up and running in no time at all!

Related Questions:

How can I tell if there is water in my lawnmower’s gas tank?

You can find out if there is water in your lawnmower’s gas tank by performing the following test. First, start up your mower and take it for a spin around the yard to warm it up. Next, turn off your motor and let the blades stop rotating completely before removing them from their housing. Now set these parts aside and take the gas tank off of the lawnmower.

Pour out any fuel that is still in it and then look for water inside the tank. If you see moisture or evidence of water damage, then this is a surefire sign that you need to replace your tank immediately.

How do I repair a cracked plastic gas tank on my lawnmower?

If you have a cracked plastic gas tank on your lawnmower, then you can easily fix it by using a soldering iron and some solder. First, make sure to drain all of the gasoline from the tank and then cut it open with a hacksaw. Apply flux to the area where you have cut and then solder the new plastic gas tank in place. It’s that easy!

What should I do if my lawnmower starts smoking after refueling?

If your lawnmower starts smoking after refueling, it is likely because there is too much fuel present in the tank. This can cause a fire to start so it is best to stop using your lawnmower and let it cool down completely. Once it has, you can then empty the gas tank and refill it with the correct amount of fuel.

Can I use a plastic gas tank on my lawnmower?

Yes, you can use a plastic gas tank on your lawnmower as long as it is compatible with your mower. You can buy plastic gas tanks online at several websites or you could even use an old one that you have lying around the house as well if it is still in good condition.

How do I fix my lawnmower’s fuel lines?

Fixing a broken fuel line on your lawnmower will involve draining all of the gasoline from your tank. Once this is done, you will need to buy a replacement fuel line kit and install it on your mower.

Check out how-to guides online before attempting anything yourself as there are high chances that you might break something if you try tinkering with it on your own without any previous experience or training!

Can I fix a plastic gas tank on my own?

Yes, you can easily fix a plastic gas tank on your lawn mower by following the simple steps mentioned in this article. You do not need any special skills or tools to get the job done and it is a much cheaper option than buying a new one altogether.

What should I do if my lawnmower’s plastic gas tank is leaking?.

If your lawn mower’s plastic gas tank is leaking, the first thing you need to do is drain out all of the fuel. Next, use a hacksaw to cut open the tank and remove it from the lawn mower. Clean up the area where the tank was located and apply flux to the open area. Solder on a new plastic gas tank and let it cool down before using your lawn mower again.

How can I prevent my lawnmower’s plastic gas tank from leaking?

The best way to prevent your lawnmower’s plastic gas tank from leaking is by keeping it clean and free from any dirt or debris. Make sure to check the tank for any cracks or damage and fix them as soon as possible.

Always refill your lawn mower with fresh gasoline and never let it run out completely. Use a gas stabilizer to keep the fuel fresh for longer periods of time. These tips will help you in preventing your plastic gas tank from leaking and keep how lawn mower running for a long time.

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