If youâ€™ve seen any of the 2006 production models at a dealer or have taken delivery on a 2006 sled, youâ€™ve likely seen a new emissions hang tag attached to every sled. Starting with the 2006 models, snowmobiles are subject to federal emissions regulations, and these hang tags indicate the â€œcleanlinessâ€ of that particular engine model family and machine. Not all sleds will have the hang tags, as only 50% of a manufacturerâ€™s build figures into the 2006 numbers, but starting in 2007 all sleds will be part of the scrutiny.
The tag displays a number between 0 and 10 called the Normalized Emissions Rating (NER) that indicates the emissions output from that engine per a specific EPA regulation (40CFR1051.135). A lower number is more clean (less exhaust emissions) and a higher number is less clean (more exhaust emissions). Remember, not each and every engine model family must meet the 30% reduction; it is a fleet average, at least for the next few years.
For example, a 2006Yamaha RS 4-stroke has a NER of 1.0, indicating it is a very low emissions engine family. The Ski-Doo 600 H.O. SDI, while 100% EPA-compliant, has a NER of 5. The Ski-Doo PowerTEK 800 and 1000 SDI, also 100% compliant, both have a NER of 6. The 2006 Polaris 600 HO engine, said to be 20% cleaner than the industry baseline, has a NER of 9.