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Old 10-06-2017, 10:19 AM   #7
Timeoff
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City: Oregon
Join Date: Oct 2017
Posts: 26
The EPA has made it very complex to understand with all the categories and HP ranges, but it looks like final Tier 3 took effect in 2014 for recreational diesels. 25-100HP allows slightly higher emissions, so manufacturers may not need to use common rail if they can meet standards. Above 100HP is more restrictive, so I'm assuming it's all electronic and common rail injection.
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