Get your facts straight. Tier IV implementation was determined in 2004.
The President was a Republican.
...and ***** pushed it..... hard. I did get it straight. Tier 4 final wasn't fully implemented until the ***** administration. Irregardless, you now get to deal with it.
Could be an electric tractor in your future, who knows. Not in mine for sure. Come to think about that, didn't General Electric build an electric lawn tractor called (I think) an 'Electrak'? That was a flop.
In reality, tier 4 interim wasn't all that bad but anyone with a brain knew what was coming down the pike. Caterpillar comes to mind. They fiddled with the Tier 4 final crap and said 'thats all folks' and got out of the on road market entirely. I still remember the 3406 compliance engine with it's compound turbocharging and it's 'furnace' with of all things a sparkplug to 'light off the raw diesel' and burn the particulates before they reached the exhaust stack. Got terrible fuel mileage and was very problem prone. Then, they were gone. Today, I don't believe Cat offers reman parts for older engines, I think everything is aftermarket now but I'm not sure as I've been retired for a couple years now.
So, yes, Tier 4 was instituted before *****'s tenure but ***** gave it a head of steam (likewise with E-gas) and look at what we have today. Rudy Diesel would roll over in his grave if he saw how prostituted his beloved diesel engine has gotten.
I twisted wrenches for a lot of years (and still do for myself). I got to see it all and I had enough and got out.
Being enviromentally correct has a price and anyone with a Tier 4 final engine is paying it.
Again, none of that impacts me, my units are all Tier 4 interim, IOW, no electronics and no pollution enhancements.