Accession Number : ADA019783

Title :   U.S. Coast Guard Pollution Abatement Program - Two-Stroke Cycle Outboard Engine Emissions.

Descriptive Note : Final rept. Jan 74-Jun 75,

Corporate Author : TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS

Personal Author(s) : Walter,R. A.

Report Date : SEP 1975

Pagination or Media Count : 134

Abstract : This report documents the results of emissions tests performed on three old and two new outboard engines. Tests of the emissions were made before and after water contact. Older engines were tested in as-received condition, tuned to factory specifications and retested. After being tuned, these engines showed improvements in emissions and fuel consumption. The new engines with improved ignition and combustion chamber design and crankcase drainage recycling showed less emission and better fuel consumption characteristics than the older engines. The results of these tests were used to calculate the emissions impact of the United States Coast Guard outboard fleet for comparison with the emissions impact of other Coast Guard vessels and vessels in general. (Author)

Descriptors :   *Air pollution, *Emission control, *Marine engines, Outboard, Tuning, Fuel consumption, Pollution abatement, Coast Guard, Exhaust gases, Boats, Test methods, Computer programs, Internal combustion engines

Subject Categories : Reciprocating and Rotating Engines
      Air Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE