Emission standards for nonroad engines are adopted by the Turkish Ministry of Science, Industry and Technology (Bilim, Sanayi ve Teknoloji Bakanlığından). The standards are harmonized with EU regulations, but implementation dates are different, as outlined in Table 1. Stage IV emisison standards were originally scheduled for 2014, but were delayed until 2019 [3302][3303].

Table 1
Turkish Emission Standards for Nonroad Diesel Engines
StagePower (P), kWDate*
Mobile Nonrod Engines
Stage I (Faz I)37 ≤ P ≤ 5602003.04
Stage II (Faz II)18 ≤ P ≤ 5602007.01
Stage IIIA (Faz IIIA)19 ≤ P ≤ 5602011.01
Stage IIIB (Faz IIIB)130 ≤ P ≤ 5602011.01 (optional)
56 ≤ P < 1302012.01 (optional)
37 ≤ P < 562018.10
Stage IV (Faz IV)130 ≤ P ≤ 5602019.01
56 ≤ P < 1302019.10
Inland Waterway Vessels
Stage IIIA (Faz IIIA)37 ≤ P2010
Rail Engines
Stage IIIA (Faz IIIA)130 ≤ P2010
Stage IIIB (Faz IIIB)130 ≤ P2012
* Market placement (new type approval dates are usually one year earlier)