Re "Smart Plug", http://deq.mt.gov/CleanSnowmobile/so...ifications.asp

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To learn more about catalytic converters, see:

William H. Haverdink, Catalytic Converter, Discovery Channel School, original content provided by World Book Online:

A promising technology that would improve two-stroke engine efficiency and reduce emissions is the Smart Plug, which, in effect, transforms a catalytic converter into the equivalent of a spark plug. The Smart Plug is a hollow cylinder with a precious-metal "catalyst" on a ceramic rod running down the middle, and a nearly-sealed bottom end, where a small amount of fuel-air mixture can enter from the area of the combustion chamber of the engine.
The catalyst has a tiny wire inside, allowing it to be pre-heated. When the catalyst is sufficiently heated and the engine's fuel-air mix is pumped in, courtesy of the starter motor, the catalyst sets fire to the small amount of charge inside its body, and the flaming charge then blasts out the holes, into the combustion chamber, and the piston goes down.

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An explanation of the Smart Plug can be found on line at the Montana State University Tech Link Center website: Catalytic Ignition Replaces Spark Plugs.

Read a story about the Smart Plug titled A clean machine? Solution to snowmobile pollution may be on park's horizon, in the Jan. 9, 2000, issue of the Bozeman Daily Chronicle.