Re: The Great Debate: Two Stroke vs. Four The whole reason for banning the two stoke is the pollution issue, what I don't understand is that many two stroke outboards use a direct fuel injection, this way there is no unburnt fuel being pushed out of the exhaust port, this not only increases efficiency, it decreases pollutants. So why don't manufacturers just use this design instead of getting rid of them all together? Direct injected two strokes are lighter, faster, more efficient and less polluting than 4-strokes. |