2 Stroke Vs. 4 Stroke Outboard Motors

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Monday, November 29, 2021

What is the difference between a 2-stroke and 4-stroke outboard motor? As the question points out, one main difference is the number of movements (strokes) it takes for the piston to complete a cycle. For example, a cycle on a 4-stroke engine begins with air and fuel intake to the compression stroke, where ignition of fuel and air occurs. So far, that is just two strokes. The third stroke brings the piston back to the bottom, and the fourth stroke presses out the exhaust as it raises to the top. That's four strokes.  The Two-Stroke Outboard Cycle A... Read More