GardenBanter.co.uk - View Single Post

28-04-2005, 10:35 AM

wrote:
Given the extraordinary amount of pollution produced by small engines,
you'd think that cat converters would be more common by now. I

Small engines are very dirty to start with. All those hydrocarbons
would kill the typical converter quickly. You need to start off with fairly
clean exhaust to start with and that means good temperature control, which
is very difficult to do with an air cooled engine (Which is why you no
longer see air cooled engines on automobiles.) and tight ignition timing and
fuel control (computer controlled fuel injection) So with the needed
equipment your next push lawn mower may cost a few thousand dollars.

Actually a lot of improvement can and has been made. Many are much less
dirty than they were 10 years ago, but you are right, more can be done.
However until people demand it, the industry will keep lobbying government
and it will not happen.

--
Joseph Meehan

Dia duit