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This Survey Report and any recommendations made herein are for the specific facility evaluated and may not be universally applicable. Any recommendations made are not to be considered as final statements of NIOSH policy or of any agency or individual involved. Additional NIOSH Survey Reports are available at DISCLAIMER Mention of any company or product does not constitute endorsement by the Centers for Disease Control and Prevention (CDC), National Institute for Occupational Safety and Health (NIOSH). The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the National Institute for Occupational Safety and Health. Working under an interagency agreement with the United States Coast Guard, researchers from the National Institute for Occupational Safety and Health (NIOSH) evaluated carbon monoxide (CO) emissions, exposures, and controls from gasoline-powered generators on houseboats. This evaluation was part of a series of studies conducted by NIOSH investigators during the past several years to identify and recommend effective engineering controls to reduce the CO hazard and prevent CO poisonings on houseboats and other recreational marine vessels. The performance of two (20 KW and 14 KW) Westerbeke Safe-CO™ generators were tested after being used on rental houseboats for two full boating seasons. The evaluated generators had 2,835 and 4,656 hours of use respectively and were equipped with catalytic converters and electronic fuel injection systems. A 12.5 KW Westerbeke generator was also tested that had been retrofitted with a Zenith electronic fuel injection (EFI) retrofit kit. Each of the engineering control devices were designed to improve generator performance and reduce CO emissions. The houseboat containing the 14 KW generator had been modified so that testing could be accomplished using either a side exhaust or stack exhaust configuration. The two Westerbeke Safe-CO™ generators used for two boating seasons performed well; average CO concentrations at various locations on the boat were generally below 5 parts per million (ppm). Peak CO concentrations were all well below 10 ppm. Both old and brand new catalysts were evaluated for the 14 KW generator. The new catalysts performed much better than the one used for two seasons. Degradation of the catalyst was observed on the 14 KW unit that had 4,656 hours of use. This generator was unable to keep CO concentrations below 4,000 ppm under load when measured directly in the exhaust plume. When the catalyst was replaced, the generator again performed according …

An evaluation of catalytic emission controls to prevent carbon monoxide poisonings from houseboat generator exhaust.