Title 40

PART 1042 APPENDIX I

Appendix I to Part 1042 - Summary of Previous Emission Standards

40:36.0.1.1.8.10.4.7.12 : Appendix I

Appendix I to Part 1042 - Summary of Previous Emission Standards

The following standards apply to compression-ignition marine engines produced before the model years specified in § 1042.1:

(a) Engines below 37 kW. Tier 1 and Tier 2 standards for engines below 37 kW apply as specified in 40 CFR part 89 and summarized in the following table:

Table 1 to Appendix I - Emission Standards for Engines Below 37 kW (g/kW-hr)

Rated power (kW)	Tier	Model year	NMHC + NOX	CO	PM
kW<8	Tier 1	2000	10.5	8.0	1.0
	Tier 2	2005	7.5	8.0	0.80
8≤kW<19	Tier 1	2000	9.5	6.6	0.80
	Tier 2	2005	7.5	6.6	0.80
19≤kW<37	Tier 1	1999	9.5	5.5	0.8
	Tier 2	2004	7.5	5.5	0.6

(b) Engines at or above 37 kW. Tier 1 and Tier 2 standards for engines at or above 37 kW apply as specified in 40 CFR part 94 and summarized as follows:

(1) Tier 1 standards. NOX emissions from model year 2004 and later engines with displacement of 2.5 or more liters per cylinder may not exceed the following values:

(i) 17.0 g/kW-hr when maximum test speed is less than 130 rpm.

(ii) 45.0 × N−0.20 when maximum test speed is at or above 130 but below 2000 rpm, where N is the maximum test speed of the engine in revolutions per minute. Round the calculated standard to the nearest 0.1 g/kW-hr.

(ii) 9.8 g/kW-hr when maximum test speed is 2000 rpm or more.

(2) Tier 2 primary standards. Exhaust emissions from Category 1 engines at or above 37 kW and all Category 2 engines may not exceed the values shown in the following table:

Table 2 to Appendix I - Primary Tier 2 Emission Standards for Commercial and Recreational Marine Engines at or Above 37 kW (g/kW-hr)

Engine size liters/cylinder	Maximum engine power	Category	Model year	NOX + THC g/kW-hr	CO g/kW-hr	PM g/kW-hr
disp. <0.9	power ≥37 kW	Category 1 Commercial	2005	7.5	5.0	0.40
		Category 1 Recreational	2007	7.5	5.0	0.40
0.9 ≤disp. <1.2	All	Category 1 Commercial	2004	7.2	5.0	0.30
		Category 1 Recreational	2006	7.2	5.0	0.30
1.2 ≤disp. <2.5	All	Category 1 Commercial	2004	7.2	5.0	0.20
		Category 1 Recreational	2006	7.2	5.0	0.20
2.5 ≤disp. <5.0	All	Category 1 Commercial	2007	7.2	5.0	0.20
		Category 1 Recreational	2009	7.2	5.0	0.20
5.0 ≤disp. <15.0	All	Category 2	2007	7.8	5.0	0.27
15.0 ≤disp. <20.0	power <3300 kW	Category 2	2007	8.7	5.0	0.50
	power ≥3300 kW	Category 2	2007	9.8	5.0	0.50
20.0 ≤disp. <25.0	All	Category 2	2007	9.8	5.0	0.50
25.0 ≤disp. <30.0	All	Category 2	2007	11	5.0	0.5

(3) Tier 2 supplemental standards. The not-to-exceed emission standards specified in 40 CFR 94.8(e) apply for all engines subject to the Tier 2 standards described in paragraph (b)(2) of this appendix.

[73 FR 37243, June 30, 2008, as amended at 75 FR 23012, Apr. 30, 2010]