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2. Chainsaw - Wikipedia

   en.wikipedia.org/wiki/Chainsaw

   Two-stroke chainsaws require about 2–5% of oil in the fuel to lubricate the engine, while the motor in electrical chain-saws is normally lubricated for life. Most modern gasoline-operated saws today require a fuel mix of 2% (1:50).

3. Two-stroke oil - Wikipedia

   en.wikipedia.org/wiki/Two-stroke_oil

   Unlike a four-stroke engine, the crankcase of which is closed except for its ventilation system, a two-stroke engine uses the crankcase as part of the induction tract, so oil must be mixed with gasoline to be distributed throughout the engine for lubrication. [1] The resultant mix is referred to as premix or petroil. [2]

4. McCulloch Motors Corporation - Wikipedia

   en.wikipedia.org/wiki/McCulloch_Motors_Corporation

   McCulloch Motors Corporation is an American manufacturer of chainsaws and other outdoor power tools.The company was founded in Milwaukee, Wisconsin, in 1943 by Robert Paxton McCulloch as a manufacturer of small two-stroke gasoline engines and introduced its first chainsaw in 1948, the Model 5-49.

5. Component parts of internal combustion engines - Wikipedia

   en.wikipedia.org/wiki/Component_parts_of...

   Snowmobiles Usually have one to four cylinders and can be both 2-stroke or 4-stroke, normally in the in-line configuration; however, there are again some novelties that exist with V-4 engines; Small portable appliances such as chainsaws, generators, and domestic lawn mowers most commonly have one cylinder, but two-cylinder chainsaws exist.

6. Four-stroking - Wikipedia

   en.wikipedia.org/wiki/Four-stroking

   Four-stroking is a condition of two-stroke engines where combustion occurs every four strokes or more, rather than every two. Though normal in some instances at idle, extremely high engine speeds, and when letting off the throttle, such firing is uneven, noisy and may, in cases of malfunction, damage the engine if allowed to continue unabated.

7. Two-stroke engine - Wikipedia

   en.wikipedia.org/wiki/Two-stroke_engine

   The first truly practical two-stroke engine is attributed to Yorkshireman Alfred Angas Scott, who started producing twin-cylinder water-cooled motorcycles in 1908. [5] Two-stroke gasoline engines with electrical spark ignition are particularly useful in lightweight or portable applications such as chainsaws and motorcycles.