A string trimmer is an important tool used in your yard maintenance routine. It’s important to service your trimmer regularly and use the correct oil to keep it in good condition. While most string trimmers on the market today use 2-cycle engines, there are some models that use 4-cycle engines. Not using the right oil in your type of string trimmer can ruin the engine making it unrepairable. Show
2-cycle string trimmers require a gasoline and oil mix consisting of an unleaded gasoline with a minimum octane rating of 89 and a maximum ethanol content of 10% and a 2-cycle premium oil that is ISO-L-EGD and JASO M345 FD certified. Most 4-cycle string trimmers require an engine oil of 10W-30. You can find recommended gas to oil mix ratio by manufacturer for 2-cycle string trimmers and recommended oil by manufacturer for 4-cycle engines below. Take all safety precautions when working with oil and your string trimmer in your operation’s manual. This post may include affiliate links. Purchases made through these links may provide a commission for us, at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. Follow all safety instructions provided in your equipment operators manual prior to diagnosing, repairing or operating. Consult a professional if you don’t have the skills, knowledge or are not in the condition to perform the repair safely. A 2-cycle (2-stroke) engine requires oil to be added to the fuel used in the string trimmer. This fuel and oil mixture is added to the fuel tank. Without adding oil to the gas, the engine will not receive the lubrication it needs for the engine parts to move freely. Running straight gas through a 2-cycle engine will cause the engine to seize and no longer work. A 2-cycle engine in a string trimmer uses a gas and oil mixed at a ratio of 50:1, 40:1 or 32:1. For example, 50:1 mix equals 50 parts gasoline to 1 part oil. The mix your string trimmer requires varies by manufacturer. You can find the correct ratio in your operator’s manual. You may also find it located on the fuel cap. To create the fuel mix, use these two items:
2-Cycle Gas and Oil Mix Ratio in a String Trimmer by Manufacturer
Amount of 2-Cycle Oil to be Mixed with Gasoline for a String Trimmer
How to Mix Gas and Oil for a 2-Cycle String Trimmer
2-Cycle Premixed FuelA great option to reduce fuel problems and extend engine life is using an ethanol-free fuel mix. Many manufacturer’s offer their own brand of premixed fuels. This is an ethanol free blend of oil and fuel that is ready to pour into your string trimmer’s fuel tank. This is a convenient item to keep on the shelf. You won’t have to deal with the bad effects of ethanol as discussed in the fuel section. Also, it’s convenient to have fuel available on your shelf when you need it. TruFuel also makes a good 40:1 premixed fuel or 50:1 premixed fuel. This is the Oil to Use in a 4-Cycle String TrimmerString trimmers that run 4-cycle (4-stage) engines have a fill port for engine oil and a fill port for gasoline. Never mix oil and fuel together for a 4-cycle engine. Also, never use 2-cycle oil in a 4-cycle string trimmer. A good engine oil is required. Oil is required to keep the engine components lubricated. When the wrong type or not enough oil is used, friction can build in the engine and overheat causing your string trimmer not to start and possibly ruin the engine. The engine oil viscosity may need to be changed to one better suited for very hot or very cold ambient temperatures when you are using your string trimmer in these types of conditions. 4-Cycle Engine Oil Viscosity Required by Manufacturer
Does it matter what 2A. No matter hold old, 2-cycle engines perform better and longer with oils specifically designed for that use. 2-cycle oils will be consumed during combustion in the piston chamber. Therefore, must be formulated with specific additive chemistry and base oils.
What is the best 2Use a 40:1 two-cycle oil mix ratio. One gallon of gasoline combined with 3.2 oz of two-cycle engine oil. Unsure of the age of your equipment? Use the 40:1 mixture.
Is 2The fuel-oil mixture ratio for all Weed Eater products is 40:1. You can obtain this ratio by mixing 3.2 oz. of two cycle air cooled engine oil with one gallon of regular gas.
Is there a difference in 2Comparing regular lubricating oil with two-stroke oil, the relevant difference is that two-stroke oil must have a much lower ash content. This is required to minimize deposits that tend to form if ash is present in the oil which is burned in the engine's combustion chamber.
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