The Environmental Protection Agency on Tuesday signed proposed new rules, which will have a sweeping effect on boat builders, engine manufacturers and manufacturers of marine generators. The EPA rule is titled Control of Emissions from Non-Road Spark Ignition Engines and Equipment. The effects of the latest proposal are two-fold; requiring spark-ignited (gas) marine engine manufacturers to meet new emission standards beginning in 2009, and requiring boat builders to reduce evaporative emissions from boat fuel systems. Under the proposal, outboard and PWC engines will have to be certified to the same stringent exhaust emission standards as will be required by the California Air Resources Board in 2008. For stern drive and inboard engines, the EPA rule proposes catalyst-based exhaust emission standards apply beginning in 2009. Boat builders will be required to change their fuel systems with requirements for fuel hose, plastic fuel tanks and controlling emissions from the fuel tank vent.