10 easy steps to clean your portable gas tank before the season

The fuel tank must be cleaned regularly. © Dominique SALANDRE

Gasoline is a fuel that doesn't keep well. In fact, it only takes a few months for it to decompose, making it ineffective and even causing problems by fouling your engine.

Have you forgotten to empty your gas tank before winter, or have you been using it for several years without cleaning it? Maybe it's time for a good cleaning, to avoid mechanical problems in the future. A small, simple project with big benefits. Follow the guide.

1 - Prepare your workspace and equipment

Set up in a well-ventilated area, outdoors if possible, so as not to be intoxicated by gasoline fumes. As far as possible, choose a day with good weather to help the tank dry.

Set up your workspace in a well-ventilated area, outdoors if possible.
Set up your workspace in a well-ventilated area, outdoors if possible.

Make sure you have the necessary equipment:

  • A bucket
  • Degreaser
  • A metal chain
  • A curved brush
  • A sponge
  • Several clean rags
  • A garden hose connected to the tap

2 - Completely empty the feeder

Start by draining the gas tank completely. Don't hesitate to stir it beforehand to loosen any deposits or dirt.

Be sure to empty the tank completely
Be sure to empty the tank completely

3 - Use a degreaser

If it's dirty, you can put a cleaning or degreasing product in it, then shake it up before emptying it again.

A degreasing product helps get rid of dirt
A degreasing product helps get rid of dirt

4 - Scrub the inside

If it's really dirty, there are several techniques you can use. You can put a piece of metal chain inside with cleaning product and shake well.

A piece of chain can help loosen dirt
A piece of chain can help loosen dirt

A curved brush (used for painting radiators) wrapped around a cloth, or with a scraping sponge around it, can help you clean stubborn areas.

Some even use gravel or aquarium quartz. Be careful, however, not to leave anything inside. Sand should be avoided.

5 - Rinse the gas tank

Empty the gas tank completely and rinse it thoroughly with a garden hose (jet position), several times if possible.

Rinse the tank thoroughly to remove all dirt
Rinse the tank thoroughly to remove all dirt

6 - Unscrew the suction system

Unscrew the suction system and clean the strainer or long filter, ensuring that no impurities remain.

Remove all the elements you can
Remove all the elements you can

7 - Allow it to dry completely

Leave the gas tank and suction openings open and allow the tank to dry completely in the sun. Not a single drop of water should remain.

You've done a good job, now go and have a drink while the tank dries out.
You've done a good job, now go and have a drink while the tank dries out.

8 - A final rinse with gas

To make sure there's no water left, carry out a final rinse with clean gas and empty the gas tank completely once again.

Make a final rinse with clean gas
Make a final rinse with clean gas

9 - Store the tank in a dry place at a constant temperature

Once the gas tank is completely dry, store it in a dry place at a constant temperature. Avoid places subject to frost or major temperature changes, which could lead to condensation and mold. A basement, attached garage or heated shed are ideal locations.

10 - Don't throw gasoline away

For god's sake, don't throw used gasoline into a corner of the garden, or use it for barbecuing. In both cases, it's a real pollution for the planet, and it's also toxic for plants or for you if you light the barbecue with it. There are waste disposal sites everywhere, where you can easily take your used petrol.

Be sure to dispose of old gasoline in an appropriate place, such as a recycling station.
Be sure to dispose of old gasoline in an appropriate place, such as a recycling station.

For four-stroke gas, with no added oil, you can also add it in small doses to the fuel tank of your car or lawnmower.

A little common sense to avoid trouble

As a general rule, never leave a gas tank with petrol for too long.

Likewise, in season, it's best to keep a completely full gas tank, as air accelerates gasoline decomposition. The more air there is, the faster the gasoline decomposes.

At the end of the season, empty the tank completely and, if necessary, rinse and dry it before storing.

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