E-M:/ Professor Dersch on Two Stroke Marine Engines

["Alex J. Sagady & Associates" <ajs@sagady.com>]

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Enviro-Mich message from "Alex J. Sagady & Associates" <ajs@sagady.com>
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Forwarded bounced message of MSU Professor Echhart Dersch...


From: "Eckhart Dersch" <dersch@msu.edu>
To: "ENVIRO-MICH (E-mail)" <enviro-mich@great-lakes.net>

Here is some information worth thinking about in Michigan, where we have
such a large number of motored watercraft.

Two-stroke engines were banned from Lake Tahoe two years ago.  Water
quality monitoring studies recently determined that although two-stroke
engines accounted for only 11 to 12% of the fuel used by boats on that
lake, they produced 90% of the MTBE (an oxygenate added to gasoline)
found in the water, and presumably 90% of the gasoline and its other
additives, such as benzene, toluene, ethylbenzene and xylene.  Amazing!
They now estimate that 25 to 35% of the fuel that goes into two-stroke
engines goes directly into the lake without being burned.  (From U.S.
Water News, July 2001)

Eckhart Dersch
Professor
Department of Resource Development
Michigan State University




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