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History of Technology Improvements
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The EPA now regulates snowmobile engine emission levels. New Technology EPA certified snowmobiles are offered for sale in the model year 2008 and have been on the market for 5 years.
2007 - National emissions regulation for snowmobiles was achieved by the snowmobile manufacturers.
2006 - National Emissions Regulation for snowmobiles, promulgated by the EPA begins.
2003 - The four snowmobile manufacturers all introduced for sale clean, 4-stroke, high technology machines. In addition to 4-stroke technology, semi-direct injection 2-stroke technology was introduced into the marketplace.
2002 - First commercially available Four-Stroke snowmobiles were introduced.
2002 - All new snowmobile exhaust systems were identified with the SSCC label signifying they were tested and certified following strict SAE Compliance procedures
1998 - Developed Frequency-Tuned intake system resulting in reduced engine sound level.
1995 - Promotion of oxygenated fuel, and technology improvements to allow use of oxy-fuel resulting in emissions reduction of 19% and 31%.
1994 - Altitude compensating carburetors introduced resulting in emissions lowered as a benefit of more accurate fuel and air metering.
1991 - Electronic Fuel Injection introduced resulting in emissions lowered utilizing electronically controlled air and fuel metering.
1988 - Movable Exhaust valves introduced resulting in largest single improvement for sound reduction and emissions lowering both.
1977 - Oil injection introduced resulting in reduced oil consumption and exhaust emissions.
1976 - Secondary air silencer introduced resulting in further reduced air-intake noise.
1976 - Center Dump Pipes introduced resulting in reduced exhaust noise.
1975 - Pipe wrap of exhaust systems introduced resulting in reduced shell noise from expansion chamber.
1975 - Fin dampeners in fan-cooled engines introduced resulting in reduced high frequency sound from cooling fins.
1974 - SSCC Regulations Promulgated resulting in mandated sound reductions and comprehensive SAE regulated testing for all OEM snowmobiles.
1973 - CDI Ignition developed resulting in emission reduction from improved combustion.
1973 - Hood Foam Lining introduced resulting in absorbed under the hood sound.
1973 - Intake air boxes introduced resulting in reduced air intake noise.
1972 - Fully enclosed engine compartment introduced resulting in trapping noise under the hood.
1971 - Variable ignition timing introduced resulting in more efficient combustion, less emission and better fuel economy.
1970 - Aluminum clutch introduced resulting in increased efficiency, lower emissions and better fuel economy.
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