What can cause emissions control elements to become ineffective?

The effectiveness of emissions control elements is heavily influenced by the components used in a small engine. When emissions control elements, such as catalytic converters or air injection systems, are replaced with non-similar parts, the intended design and function are compromised. Non-similar parts may not meet the specifications necessary to facilitate the proper chemical reactions or manage exhaust gases effectively.

For instance, if a catalytic converter is swapped out with one that is not compatible with the engine's specifications, it might not sufficiently reduce harmful emissions or might even introduce new issues. Such mismatches can lead to an increase in pollutants being released into the atmosphere, defeating the purpose of having emissions control systems in place.

In contrast, using recommended lubricants, maintaining the engine properly, and correctly aligning spark plugs are practices that typically support the overall health of the engine and its emissions control systems. They help ensure optimal performance and longevity, whereas the use of non-similar replacement parts directly undermines the function of emissions controls.