How to Mix Two Stroke Fuel

Written by ehow home & garden editor
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Two-stroke engines are lighter and less expensive to make than four-stroke engines. Four-stroke engines fire only every other revolution while two-stroke engines fire every revolution, making them much more powerful for their size. That power, however, comes at a price. Two-stroke engines use more gasoline and require a specific oil to gas ratio. Mixing two-stroke fuel properly is important to keep the engine lubricated and prevent excessive wear and tear.

Skill level:
Moderate

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Things you need

  • Measuring cup
  • Two-stroke oil
  • Gasoline
  • Empty gas can

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Instructions

  1. 1

    Determine if your engine is a two-stroke or a four-stroke. Check the gas tank on your lawnmower or the owner's manual to determine what type of engine you have.

  2. 2

    Read the label of your two-stroke oil. Follow the directions on the package to ensure the right mix.

  3. 3

    Measure and pour the gasoline in to the empty gas can.

  4. 4

    Add four ounces of two-stroke oil per each gallon of gas.

  5. 5

    Replace the cap on the gas can and shake the oil and gas to mix. Add fuel to your engine.

Tips and warnings

  • You can mix 3.2 ounces of oil per gallon of gas instead of 4 ounces to run leaner. However, less lubrication from the oil can cause faster deterioration of your engine.
  • Quickly wipe up any spilled oil or gas.
  • Oil and gas are extremely toxic. Make sure to tightly seal any leftover oil and gas, and store securely out of the reach of children and pets.
  • Two-stroke engines produce a lot of pollution. Ensuring you have the correct fuel mix increases the efficiency of the engine and reduces emissions.

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