As was pointed out to me elsewhere here today, Evinrude use a point-oiling system[1] that, combined with direct injection, results in air pollution no worse than a four-stroke, and it can achieve higher thermodynamic efficiency.[2]
1. https://en.wikipedia.org/wiki/Evinrude_Outboard_Motors
2. https://en.wikipedia.org/wiki/Two-stroke_engine#Emissions
As was pointed out to me elsewhere here today, Evinrude use a point-oiling system[1] that, combined with direct injection, results in air pollution no worse than a four-stroke, and it can achieve higher thermodynamic efficiency.[2]
1. https://en.wikipedia.org/wiki/Evinrude_Outboard_Motors
2. https://en.wikipedia.org/wiki/Two-stroke_engine#Emissions