How to dilute two-stroke oil for grass trimmer

Oil to Gas Ratio in the Ryobi SS30 Trimmer | Home Guides

Two-stroke or two-stroke engines require premixing oil and fuel to lubricate the piston. Without lubrication, engine will seize. A stuck engine cannot be repaired and creates a bad workday. To prevent a costly mistake, always mix the specified 50:1 ratio of gasoline to oil for the Ryobi SS30 Grass Trimmer. This will make for a quiet day’s work in the yard.


You can get a 50: 1 fuel ratio by mixing one gallon of unleaded gasoline with an octane rating of at least 87 with 2.6 ounces of two-stroke oil in a container approved for gasoline storage. Pour oil into container first; then add gasoline. Gently swirl the container so the products are fully mixed. Don’t shake the tank too much. This can cause air bubbles to form. Make as much fuel as you can use in 30 days. If one gallon is too much, cut the recipe in half.


When mixing fuel for your weed trimmer, use fresh unleaded gasoline. Gasoline older than 30 days forms a film and clogs the carburetor.Stale gas. One of the most common causes of trimmer starting problems. Fuel containing ethanol left in the trimmer or gas cylinder for more than 30 days will absorb moisture and not burn properly. You can extend the life of your gasoline by up to six months by adding a fuel stabilizer to it when you buy it.

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How to correctly mix your 2 stroke oil for trimmers, chainsaws, blowers, etc.

two-stroke, grass, trimmer

Two-stroke oil

Use only two-stroke oil designed for oil-cooled engines in your weed trimmer. Avoid using SAE-weighted automotive oil or two-stroke marine engine oil.You can use synthetic two-stroke oil in your trimmer. Properly lubricated new engines at first smoke, as do engines with too much oil in the fuel mixture. If your unit is past its running-in period and you notice smoke coming from the exhaust, there is likely too much oil in the fuel mixture. Turn off the grass trimmer, drain the fuel, and replace it with properly mixed fuel.


Storing the grass trimmer for 30 days or more without fuel stabilizer in the fuel tank makes it vulnerable to internal engine damage.If fuel is left for a long period of time, it will separate. A two-stroke engine needs fuel that is thoroughly mixed so that it has enough oil to lubricate as it passes through the engine. Stratified fuel can run pure gasoline through the engine, alternating with parts of nearly pure oil, resulting in engine damage. To prevent this, drain the fuel from the unit before storing it and let the unit run until it stops completely. This signals that all the fuel is used up. The machine is now ready for safe storage.

The consequence of a faulty ratio

The engine life of a brushcutter depends on how accurately you follow the Manufacturer’s recommended oil to gasoline ratio. The fact is that the fuel mixture enters the cylinders in the form of a gasoline-oil mist. And the task of the oil composition is to lubricate the moving and friction parts and surfaces of a variety of parts that are in the cylinder. If it suddenly turns out that there is not enough oil, and somewhere there is not enough oil at all, the parts that are in contact will start to damage each other. This results in scoring, scratches and chips, which will definitely lead to complete or partial engine failure (e.g., it may jam).

In the opposite case, when too much oil enters the engine, it does not have time to burn completely, settling on the walls of the cylinder and turning over time into solid particles. coke, slag and the like. As you can guess, this also leads to engine failure. The most important thing that should not be allowed. even a single violation of the proportion towards the lack of oil. It’s better to overfill a little oil 10 times than to underfill just once. It often happens that this time is quite enough to break the engine.

two-stroke, grass, trimmer

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How to mix 2 Stroke fuel small engine petrol / oil tutorial demonstration 50:1 40:1 32:1 25:1 ratio

Gasoline and oil ratio for a two-stroke engine 1 to 50: that’s how much oil, rules for preparing the mixture

There are certain parameters for mixing gasoline with oil composition. It is the main kind of fuel for two-stroke engines. The resulting fuel keeps the engine running for a long time, thereby keeping it productive. How to mix the necessary ingredients in the proportion of 1 to 50, this is how much oil, will be considered further.

The first start of the grass trimmer

When everything is checked and the prepared fuel mixture is poured into the tank, it is time to start the grass trimmer for the first time before running it in. To do this, it is necessary to perform the following manipulations:

2 STROKE OIL MIX any ratio and any quantity EASY

  • Position your brushcutter on a flat, level surface;
  • Move the control lever of the air damper in the closed position;
  • Pump a few pumps of primer fuel into the carburetor;
  • Turn on the ignition toggle switch;
  • Pull the starter cord gently until you feel resistance;
  • Then pull the cord 3 to 4 times until the lawnmower is running;
  • After starting, open the choke.

If the machine doesn’t start or stops working the first time, open the choke on the carburettor a little and try again.

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