1. Select a Category

EPA defines an “Engine” as an assembled Block and Crank.

Everything from a Short-Block Assembly to a Complete Engine has the same EPA Engine rules.

A bare Block and a bare Crank are unrestricted parts, but anyone that assembles a new Block and new Crank is an Engine Manufacturer with the applicable EPA responsibilities.

New Certified Engines:

Typically available through Industrial Engines

Certified compliant with the emissions rules in place when they are/were imported (now Tier 4)
“New Old Stock” that was Certified when imported prior to 2013 is still Certified for new replacement use up to the year they were certified to.
Yanmar’s Repurpose program originally used New Old Stock Certified engines. All of the popular specs have been consumed. Mastry Engine Center still has a few less popular engines specs available. 
 
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New Replacement-Only (NRO) Engines:

Complete NRO engines have the same availability as above. Typically available through Industrial Engines  
NRO Short-Block Engines are available through REMAN (purchased through Parts, administrated REMAN)
NRO Engines built up from NRO SB Engines (to HBC, LB, 3/4, or Complete) are available through REMAN
Repurpose NRO Engines of any completeness level are available through REMAN
All NRO Engines (SB to Complete from any department) are under same EPA NRO rules & must be tracked.
Tracking requirement includes Engine Models and Serial Numbers of all engines (import, REMAN/Repurpose, & recovered core)

*Understandably REMAN engines cannot be exported or the program would slowly shrink.

*Repurpose NRO engines can be exported but will be subject to a core charge.

*NRO engines can be exported and/or relabeled with appropriate documentation.