2-Cycle Engine Identification and Oil Mix Ratio Information
Is this a 2-cycle engine? How much oil should be added to the gasoline?
The vast majority of engines Briggs & Stratton manufactures are 4-cycle engines; these engines DO NOT use an oil/gas mix.
The easiest way to determine if an engine is a 2-cycle or 4-cycle would be the number and type of fill ports on the engine. If the engine has a single fill port
2-Cycle Gas/Oil Fill Cap for both the oil and gas, the engine is a 2-cycle. If the engine has two fill ports, one for gas
Fuel Cap and another separate fill for oil
Examples of Oil Fill Caps, the engine is a 4-cycle.
The following 2-cycle (stroke) engine series were provided to equipment manufacturers until about 1991:
In addition, Briggs & Stratton has recently begun manufacturing the following model series for 2-cycle snow engines:
For more information on finding your model number, please visit our Identify Your Model Number page.
For equipment powered by a 2-cycle engine, the correct oil/gas ratio can be obtained in your equipment's Operator Manual. The following chart provides two common ratios used in 2-cycle Briggs & Stratton engines:
|2 Cycle Oil
||2.6 US Oz.
||5.1 US Oz.
||7.7 US Oz.
||10.2 US Oz.
||12.8 US Oz.
|2 Cycle Oil
||4.0 US Oz.
||8.0 US Oz.
||12.0 US Oz.
||16.0 US Oz.
||20.0 US Oz.
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