What kind of emission controls is EPA considering?
We are proposing standards that manufacturers would meet on an average basis, which may encourage manufacturers to use a broader array of technologies across their product line. We don’t specify what emission controls manufacturers must use to comply with the regulations, but we anticipate many manufacturers will choose to meet them by using four-stroke engines instead of two-stroke engines. Some manufacturers may also slightly change the air-fuel mixture. Others may decide to use a technology such as advanced fuel injection or catalytic converters on some models to meet regulations.
