Quote:
Originally Posted by gasgasman
Not quite,IMO.
The reasons they say the 2 strokes run cleaner is, the factor in oil changes with the 4 strokes.
The 4 strokes create more waste products due to that.
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http://www.evinrude.com/en-US/Media....07.04.2005.htm
Evinrude® E-TEC™ Clean Air Technology
Bombardier Recreational Products Inc.
In 2003, Bombardier Recreational Products Inc. (BRP) introduced Evinrude E-TEC, an outboard engine for marine recreational products, which is based on a two-stroke engine technology. Compared to a similar 2004 four-stroke engine, carbon monoxide emissions with Evinrude E-TEC are typically 30 to 50 percent lower; and at idle are lower by a factor of 50 to 100 times. In addition, Evinrude E-TEC emits 30 to 40 percent less total particulate matter on a weight basis than a similar “ultra-low emissions” four-stroke outboard. Furthermore, oxides of nitrogen and hydrocarbon emissions for Evinrude E-TEC are similar, if not lower, than a four-stroke outboard. There are no oil changes with this engine, as well as no belts, and no valve or throttle linkage adjustments. This makes Evinrude E-TEC engines easier to own than comparable four-stroke engines. In addition, numerous advancements combine to create the Evinrude E-TEC quiet signature sound including an exclusive idle air bypass circuit.
Also they can meet current CA CARB emission standards. These 2 strokes are allowd in some of the cleanest lakes in the world as well.
Skidad in MA