[Rhodes22-list] Outboards

[Steve]

Roger
These are small motors.  Until you get a car that runs
only on battery.  This is just not an issue. 2 cycles
will always be the moter of choice.  They are just
easier to work on.  My smoking probably polutes more
than my motor. 
Steve


--- Roger Pihlaja <cen09402 at centurytel.net> wrote:

> Bob,
> 
> Your summary is excellent!  I would only add a
> couple of points:
> 
> Two cycle exhaust has been shown to contain
> significant concentrations of
> some really BAD SHIT!  Two cycle exhaust contains
> chemical species like
> dioxins, tetrahydrofurans, & polycyclic aromatics
> that are biologically
> active at causing cancer & mutations at
> frighteningly low concentrations, do
> not readily biodegrade, & which tend to
> bioconcentrate up the food chain.
> These facts are a matter of record & are not in
> dispute.  Humans sit at the
> top of the food chain, so we tend to get the biggest
> dose of these chemicals
> if we consume marine organisms.  Small two cycle
> outboards tend to be used
> on small craft like fishing boats & sailboats that
> are used in near shore
> waters, rivers, lakes, & estuaries.  Microorganisms
> in these bodies of water
> are ecologically at the base of the food chain &
> tend to live in the upper
> layers of the water column where the 2-cycle exhaust
> is emitted.  These
> bodies of water tend to be the most productive in
> terms of the reproductive
> cycles of many commercially important marine
> organisms, and therefore the
> most sensitive to this sort of pollution. 
> Admittedly, each small 2-cycle
> outboard does not emit much pollution.  However, the
> fact that there are so
> many small outboards operating & they tend to emit
> their pollution directly
> into the most vulnerable ecosystems in the upper
> portion of the water column
> where these pollutants can potentially cause the
> most harm is why banning
> small 2-cycle outboards is a really good idea.
> 
> Initially, the marine industry was strongly against
> any regulation of
> 2-cycle engines.  This industry had a tremendous
> investment to protect in
> terms of in-place manufacturing capacity & marine
> engine market share all
> based upon 2-cycle engine technology.  However, over
> a period of years, the
> scientific evidence mounted & eventually, the marine
> industry got on board.
> In the end, the major players in the marine industry
> actually helped craft
> the emission regulations now going into affect.  I
> cited the major
> scientific studies in my FAQ on the subject.  If
> Bill can show any solid
> evidence that there was some sort of conspiracy;
> then, I welcome him to
> present it.  Naturally, this quality of this
> evidence would need to rise
> well above his usual anecdotal standard of simply
> repeating the
> unsubstantiated words of other conspiracy theorists
> on the web or newspapers
> like the New York Times.  Actually, the
> environmental standards now going
> into affect appear to be one of the best examples of
> cooperation between
> enviromental regulators and industry in US history.
> 
> Roger Pihlaja
> S/V Dynamic Equilibrium
> 
> ----- Original Message -----
> From: "Robert Skinner" <robert at squirrelhaven.com>
> To: "The Rhodes 22 mail list"
> <rhodes22-list at rhodes22.org>
> Sent: Thursday, September 23, 2004 10:02 AM
> Subject: Re: [Rhodes22-list] Outboards
> 
> 
> > Roger Pihlaja wrote:
> > > Bill,
> > > ...
> >
> > This looks like a classic case of engineer vs.
> liberal arts
> > major, textbook vs. anecdote.
> >
> > Perhaps the audience has already made up their
> minds about
> > the evidence, and is sitting back in ring-side
> seats for
> > the clash of Titanic wills?
> >
> > The tally of at least partly substantiated
> generalizations
> > so far seems to be as follows:
> >
> > 2-strokes are lighter
> > 2-strokes are noisier
> > 2-strokes are banned on some waters due to
> polluting output
> > 2-stroke production is being limited
> > 2-strokes are cheaper when you can find them
> >
> > 4-strokes are generally seen as less polluting
> > 4-strokes, broken in and in good tune, are less
> polluting
> > 4-strokes are still heavier than 2-strokes
> > 4-strokes tend to be more expensive
> > 4-strokes are quieter
> > 4-strokes tend to vibrate more - 1/2 the power
> pulses
> >
> > Have I missed anything?  Is there any remaining
> disagreement?
> > --
> > Robert Skinner
> > "Squirrel Haven", 9 Gateway Commons, Gorham, Maine
> 04038-1331
> > __________________________________________________
> > Use Rhodes22-list at rhodes22.org, Help?
> www.rhodes22.org/list
> >
> >
> 
> 
> __________________________________________________
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