As far as I know the emission regs don't apply to stuff under 80 hp but I could be wrong.
I can tell you this... if I have a choice between an engine with DEF and an engine with EGR... I'll take the one with DEF every single time without a second thought. EGR is a nightmare that doesn't work and never will work on a diesel engine (reliably). With DEF you essentially have a Tier II engine with aftertreatment and Tier II engines were about as good as diesel's got in most respects.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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