What Is the Gas-Oil Mix Ratio for a Featherlite SST Weed Eater?

The Weed Eater Featherlite SST line trimmer uses a gas and oil mixture to lubricate its 2-cycle engine. Small 2-cycle engines do not have an oil pump as larger engines in cars do. Mixing your oil too lightly can cause the pistons and rings to wear out prematurely. Mixing too much oil with the gas causes a clogged exhaust system and creates smoke.

Mixing Gas and Oil

The correct ratio of gas-to-oil mixture for Weed Eater line trimmers is 1 part oil to 40 parts gasoline. The best method of mixing is to start by adding 1 gallon of regular unleaded gasoline to a gas can. Then pour in a 3.2-ounce bottle of good quality, synthetic 2-cycle air-cooled engine oil. Either cap the gas can or turn the nozzle inward and tighten it to seal the gas. Give the contents a vigorous shaking for a few minutes to evenly mix them and then add the mixture to the trimmer's gas tank. Shake the can again before you fill the engine each time, because oil and gas separate from each other in containers.

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