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Automotive glossary

Two-Stroke Engine

A two-stroke engine completes its cycle in one crankshaft revolution, giving a power stroke every turn.

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What is Two-Stroke Engine?

It is simple, light and powerful for its size. Oil is usually mixed with the fuel or injected. Cars with two-stroke engines were made decades ago; today they are rare. Two-stroke engines remain common in some motorcycles, outboard motors and garden tools.

How it works

Intake and exhaust happen through ports while the piston moves, without separate valve strokes.

Why it matters for your car

Emissions are high compared with modern four-stroke engines. The wrong oil mix can seize the engine.

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