Engine Database

Outboard database explained

The information contained here has been gathered from the best available public information. Buyers should always check with the manufacturers for the latest information.
Last updated January 2015. Please contact us with any corrections or updates.
Emissions are explained here.
The Emissions Star Ratings are explained below

Make	Model	HP	Technology	Alternator	Cylinders	Kg	Emissions Star Rating	Emissions HC + NO	Emissions CO
Honda	BF2.3DK2 SCHD	2	4c	-	1	12.2	3	20.8	304
Yamaha - premix	2CMHS	2	2c	-	1	16.5	0 est
Mercury	M	2.5	4c	5A	1	19	3	25.5	434.1
Mercury	M	2.5	2c	-	1	13	0	277.1	399.4
Parsun	T2.5BMS 2C	2.5	2c		1	16	0 est
Parsun	F2.6MBS 4C	2.6	4c		1	18	3	29.8	134.5
Suzuki	DF2.5S	2.5	4c	-	1	14	3	24	367.8
Tohatsu	MFS2.5A S	2.5	4c	-	1	13	3	24.1	382.1
Tohatsu	M2.5A2 S	2.5	2c	-	1	12.5	0	305.3	150
Yamaha	F2.5AMHS	2.5	4c	-	1	17	2	42.9	466.2
Yamaha - premix	3AMHS	3	2c	-	1	16.5	0 est
Mercury	M	3.3	2c	4A	1	13	0	277.1	399.4
Evinrude	E3R4	3.5	4c	-	1	18.4	3	27.7	468.8
Mercury	M	3.5	4c	5A	1	19	3	27.7	468.8
Tohatsu	MFS3.5A S	3.5	4c	-	1	19	3	24.1	382.1
Tohatsu	M3.5A2 S	3.5	2c	-	1	12.5	0	305.3	150
Tohatsu	M3.5B2 S	3.5B	2c	-	1	13	0	280.2	150
Parsun	T3.6BMS 2C	3.6	2c		1	16	0 est
Evinrude	E4R4	4	4c	-	1	26	3	24.3	468.9
Mercury	M	4	4c	5A	1	25	3	24.3	468.9
Mercury	M	4	2c	-	1	20	1	221.9	236.2
Parsun	F4BMS 4C	4	4c		1	24.5	3	21.8	339.9
Suzuki	DF4S	4	4c	6A (op)	1	25	3	19.1	268
Tohatsu	MFS4BD S	4	4c	5A	1	26	3	24.7	354.4
Tohatsu	M4C S	4	2c	5A	1	19	1	204	258.4
Yamaha	F4BMHS	4	4c	6A	1	27	3	22.5	290.9
Yamaha - premix	4ACMHS	4	2c	5A	1	21	0	332.3	598.3
Honda	BF5DK2 SB	5	4c	3A	1	27	3	23.1	189
Mercury	M	5	4c	5A	1	25	3	24.3	468.9
Mercury	M	5	2c	4A	1	20	1	221.9	236.2
Parsun	F5BMS 4C	5	4c		1	24.5	3	21.8	296.5
Suzuki	DF5S	5	4c	6A (op)	1	25	3	19.1	268
Tohatsu	MFS5BDS	5	4c	5A	1	25	3	24.7	354.4
Tohatsu	M5BDS	5	2c	5A	1	19	1	204	258.4
Yamaha	F5AMHS	5	4c	6A	1	27	3	22.5	290.9
Yamaha - premix	5CMHS	5	2c	5A	1	21	0 est
Evinrude	E6R4	6	4c	-	1	26	3	24.3	468.9
Mercury	M	6	4c	5A	1	25	3	24.3	468.9
Mercury	M lite	6	2c	-	2	26	0	306.1	225.5
Parsun	T6BMS	6	2c	-	2	26	0 est
Suzuki	DF6S	6	4c	6A (op)	1	25	3	19.1	268
Tohatsu	MFS6B S	6	4c	5A	1	25	3	24.7	354.4
Tohatsu	MFS6BSUL (Sail)	6	4c	5A	1	25	3	20.7	263
Tohatsu	M6B S	6	2c	6.7A	2	26	1	220.9	377.3
Yamaha - premix	6CMHS	6	2c	6	2	27	0	322.7	331.7
Yamaha	F6CMHS	6	4c	6A	1	27	3	22.5	290.9
Honda	BF8DK2 SHD	8	4c	6A	2	42	3	18.5	317
Mercury	M	8	4c	6A	2	38	3	20.7	144.4
Mercury	M lite	8	2c	-	2	26	0	306.1	225.5
Suzuki	DF8AS	8	4c	6A (op)	2	39.5	3	17.6	196
Tohatsu	MFS8A3 S	8	4c	6A	2	37	3	20	296.4
Tohatsu	M8B S	8	2c	-	2	26	1	220.9	377.3
Yamaha - premix	8CMHS	8	2c	6A	2	27	0	322.7	331.7
Yamaha	F8CMHS	8	4c	6A	1	38	3	21.9	325
Evinrude	E10EL4	9.8	4c	6A	2	37	3	20.7	144.4
Honda	BF10DK2 SHD	10	4c	6A	2	42	3	18.5	317
Mercury	M	9.9	4c	6A	2	38.1	3	20.7	144.4
Mercury	M	9.9	2c	8A	2	35	0	323.2	533.4
Mercury - Big Foot	EL bigfoot	9.9	4c	6A	2	43	3	20.7	144.4
Parsun	T9.8BMS	9.8	2c		2	26	0 est
Parsun	F9.8BMS	9.8	4c		2	38	3	13.6	104.2
Suzuki	DF9.9AS	9.9	4c	6A (op)	2	39.5	3	17.6	196
Suzuki	DT9.9AS	9.9	2c	-	2	33	0 est
Tohatsu	MFS9.8A3 S	9.8	4c	6A	2	37	3	20	296.4
Tohatsu	M9.8B S	9.8	2c	6.7A	2	26	1	195	150
Tohatsu	M9.9D2 S	9.9	2c	6.7A	2	37	1	180.9	287.2
Yamaha	F9.9FMHS	9.9	4c	6A	2	39.9	3	18.6	267.7
Yamaha - premix	9.9FMHS	9.9	2c	6A	2	36	1	249.6	408.4
Evinrude	E15RL4	15	4c	12A	2	52	3	18.4	150.7
Honda	BF15DK2 SHD	15	4c	6A	2	46.5	3	16.6	182
Mercury	15ML	15	4c	11	2	52	3	18.4	150.7
Mercury	M L super	15	2c	6A	2	42	1	173.5	270.3
Mercury	ML	15	2c	6A	2	35	0	323.2	533.4
Parsun	T15BML 2C	15	2c		2	37.5	0 est
Parsun	F15BML 4CT	15	4C		2	51	3	16	221.3
Suzuki	DF15AS	15	4i	6	2	44	3	17.1	59.9
Suzuki	DT15AS	15	2c	-	2	33	0 est
Tohatsu	MFS15CL	15	4c	12A	2	52	3	16.8	155.6
Tohatsu	M15D2 S	15	2c	6.7A	2	37	1	180.9	287.2
Yamaha	F15CMHS	15	4c	10A	2	50	3	22.3	229
Yamaha - premix	15FMHL	15	2c	6A	2	36	1	249.6	408.4
Tohatsu	M18E2 S	18	2c	6.7A	2	37	1	173.5	270.3
Honda	BF20DK2 SHD	20	4c	6A	2	46.5	3	16.6	182
Mercury	20ML	20	4c	11A	2	53	3	18.4	150.7
Suzuki	DF20AS	20	4i	6	2	44	3	17.1	59.9
Tohatsu	MFS20CL	20	4c	12A	2	52	3	16.8	155.6
Yamaha	F20BMHL	20	4c	10A	2	53.7	3	14.6	311.1
Yamaha - premix	20DMHL	20	2c	6A	2	48	1	201.9	200.4
Evinrude E-TEC	E25DTSL	25	2di	56A	2	64.4	3	16.4	139.8
Mercury	ML EFI	25	4i	15A	3	71	3	14.9	279.4
Parsun	T25BML 2C	25	2c		2	53	0 est
Parsun	F25BML FES	25	4c		2	68	3	12.8	152
Suzuki	DF25S	25	4c	6A	V2 70_	70	3	15.5	205.2
Suzuki	DF25A	25
Tohatsu	MFS25B (EFI) L	25	4i	15A	3	82.5	3	16.1	226.3
Tohatsu	M25C3 L	25	2c	6.7A	2	52	1	160.7	194
Yamaha	F25DETL	25	4c	10A	2	79	3	14.6	230.5
Yamaha - premix	25NMHL	25	2c	6A	2	48	1	201.9	200.4
Evinrude E-TEC	E30DTSL	30	2di	56A	2	64.4	3	16.4	139.8
Honda	BF30DK2 LHTD	30	4c	10A	3	72.5	3	13.5	215
Mercury	ML GA EFI	30	4i	15A	3	71	3	14.9	279.4
Mercury	MLH	30	2c	6A	2	48	1	164.2	202.9
Parsun	T30BML 2C	30	2c		2	75.1	0 est
Suzuki	DF30A	30	4i	14A	3	71	3	16.5	34
Suzuki	DT30L	30	2c	2.5A	2	57.5	1 est
Tohatsu	MFS30B (EFI) L	30	4i	15A	3	82.5	3	16.1	226.3
Tohatsu	M30A4 L	30	2c	6.7A	2	52	1	164.2	202.9
Yamaha	F30BETL	30	4i	16A	3	99.6	3	15.6	131.7
Yamaha - precision blend	30DETOL	30	2c	6A	3	66	1	237.6	425.6
Evinrude E-TEC	E40DPLII	40	2di	81A	2	109	3	15.2	66.5
Honda	BF40DK2 LRTL	40	4i	17A	3	98	3	13.2	74.5
Mercury	ELPT EFI	40	4c	6A	3	93	3	13	185.4
Mercury	ELPTO 2cyl	40	2c	18A	2	78	1	142.2	192.3
Mercury	MLH 3cyl	40	2c	11	3	69	1	142.2	192.3
Mercury - Big Foot	ELPT EFI bigfoot	40	4i	18A	4	120	3	14.2	188.9
Parsun	T40BML 2C	40	2c		2	75.1	0 est
Suzuki	DF40ATL	40	4i	19A	3	104	3	14.6	73.7
Suzuki	DT40L	40	2c	18A	2	76	1 est
	MSF40A	40	4i	21A	3	95	3	13.6	212
Tohatsu	M40D2 L	40	2c	11A	3	85	1	153	150
Tohatsu - TLDI	MD40B EPTOL	40	2di	23A	3	93.4	3	16.1	96.6
Yamaha	F40FETL	40	4i	15A	3	90.4	3	15.6	131.7
Yamaha - CV Premix	40XWTL	40	2c	6A	2	80.7	1	196.6	364.8
Yamaha - precision blend	40VETOL	40	2c	6A	3	88	1	167.5	329.7
Evinrude E-TEC	E50DPLII	50	2di	81A	2	109	3	15.2	66.5
Honda	BF50DK2 LRTL	50	4i	17A	3	98	3	13.2	74.5
Mercury	ELPT EFI	50	4i	20A	4	112	3	14.2	188.9
Mercury	ELPTO	50	2c	16A	3	93	1	140.1	411
Mercury - Big Foot	ELPT EFI bigfoot	50	4i	20A	4	120	3	14.2	188.9
Suzuki	DF50ATL	50	4i	19A	3	104	3	14.6	73.7
Tohatsu	MSF50A	50	4i	21A	3	95	3	13.6	212
Tohatsu	M50D2 EPTOL	50	2c	11A	3	85	1	167.8	387
Tohatsu - TLDI	MD50B EPTOL	50	2di	23A	3	93.5	3	16.1	96.6
Yamaha	F50FETL	50	4i	17A	4	111	3	15.1	128.7
Yamaha - CV Premix	50HETL	50	2c	6A	2	87	1	167.5	329.7
Yamaha - precision blend	50HETOL	50	2c	6A	3	86	1	167.5	329.7
Mercury	Sea Pro MLHG	55	2c	18A	3	100	1	140.1	411
Evinrude E-TEC	E60DPLII	60	2di	81A	2	109	3	13.4	66.5
Honda	BF60AK1 LRTL	60	4i	18A	3	110	3	13.3	99.1
Mercury	ELPT EFI	60	4i	20A	4	112	3	13	161.4
Mercury	ELPTO	60	2c	16	3	99.5	1	140.1	411
Mercury	Sea Pro Big Foot MLHG	60	2c	16A	3	108	1	140.1	411
Mercury - Big Foot	ELPTO bigfoot	60	2c	16A	3	109	1	140.1	411
Mercury - Big Foot	ELPT EFI bigfoot	60	4i	20A	4	120	3	157.9	298.1
Parsun	T60FWL	60	2c	tba	3	119	0 est
Suzuki	DF60ATL	60	4i	19A	3	104	3	14.6	73.7
Tohatsu	BFT60A	60	4i	22A	3	110	3	13.3	99.1
Tohatsu	M60C EPTOL	60	2c	A	3	115	1	157.9	298.1
Yamaha	F60CETL	60	4i	17A	4	111	3	15.1	128.7
Yamaha - Enduro	E60HMHDL	60	2c	6A	3	102	1	168.2	319.4
Yamaha - high thrust	FT60DETL	60	4i	17A	4	115	3	15.1	128.7
Yamaha - precision blend	60FETOL	60	2c	6A	3	105	1	168.2	319.4
Suzuki	DF70ATL	70	4i	27A	4	155	3	12.4	60.3
Tohatsu	M70C EPTOL	70	2c	11A	3	115	1	151.4	291.2
Tohatsu - TLDI	MD70B EPTOL	70	2DI	23A	3	143	3	12.4	134.7
Yamaha - precision blend	70BETOL	70	2c	6A	3	105.5	1	168.2	319.4
Yamaha	F70AETL	70	4i	17A	4	118	3	11.2	108
Evinrude E-TEC	E75DPLII	75	2di	81A	3	145	3	12.3	69.8
Honda	BF75DK2 LRTL	75	4i	35A	4	162	3	12.3	103.1
Mercury	ELPT EFI	75	4i	50A	4	181	3	15.4	336
Mercury	ELPT EFI	75	4i	35A	4	163	3	11.8	170
Mercury	ELPTO	75	2c	18A	3	138	1	122.9	401.5
Mercury - Optimax	ELPT	75	2di	60A	3	170	3	13.3	127.5
Parsun	T75FWL	75	2c		3	119	0 est
Tohatsu	BFT75A	75	4i	35A	4	166	3	12.4	135.7
Honda	BF80 A LRTL	80	4i		4	165	3	12.3	103.1
Suzuki	DF80ATL	80	4i	27A	4	155	3	12.4	60.3
Mercury	ELPT EFI	80	4i	50A	4	181	3	15.4	336
Yamaha	F80BETL	80	4i	25A	4	172	3	16.2	102
Evinrude E-TEC	E90DPLII	90	2di	81A	3	145	3	12.3	69.8
Honda	BF90DK2 LRTL	90	4i	35A	4	163	3	12.3	103.1
Mercury	ELPT EFI	90	4i	50A	4	181	3	15.4	336
Mercury	ELPT EFI	90	4i	35A	4	163	3	11.8	170
Mercury	ELPTO	90	2c	18A	3	138	1	122.9	401.5
Mercury - Optimax	ELPT	90	2di	60A	3	170	3	13.3	127.5
Parsun	T90FWL	90	2c		3	119	0 est
Suzuki	DF90ATL	90	4i	27A	4	155	3	12.4	60.3
Tohatsu	BFT90A	90	4i	35A	4	166	3	12.4	135.7
Tohatsu	M90A EPTOL	90	2c	11A	3	135	1	147.7	286
Tohatsu - TLDI	MD90B EPTOL	90	2DI	23A	3	143	3	12.4	134.7
Yamaha - precision blend	90AETOL	90	2c	10A	3	122.5	1	161.4	432.5
Honda	BF100 A LRTL	100	4i		4	166	3	12.3	103
Suzuki	DF100ATL	100	4i	40A	4	182	3	13.9	56
Mercury	ELPT EFI	100	4i	50	4	181	3	15.4	336
Yamaha	F100DETL	100	4i	25A	4	172	3	16.2	102
Evinrude E-TEC	E115DPLII	115	2di	133A	V4 60_	167	3	12.8	122.8
Evinrude E-TEC	E115DHXII	115HO	2di	133A	V4 60_	177	3	12.8	122.8
Honda	BF115DK1 XD	115	4i	40A	4	217	3	13.8	75.6
Mercury	ELPT EFI	115	4i	50	4	181	3	15.4	336
Mercury	ELPT EFI	115	4i	35A	4	163	3	11.8	170
Mercury - Optimax	ELPT	115	2di	60A	3	170	3	13.3	127.5
Mercury - Optimax Pro XS	L	115	2di	60A	3	170	3	12.6	139.7
Suzuki	DF115ATL	115	4i	40A	4	182	3	13.9	56
Tohatsu	BFT115A	115	4i	40A	4	217	3	13	80.2
Tohatsu	M115A2 EPTOL	115	2c	27.5A	4	164	1	199.6	150
Tohatsu - TLDI	MD115A EPTOL	115	2di	40A	4	173	3	13	80.2
Yamaha	F115LB	115	4i	35A	4	171	3	11.8	204.9
Mercury - Optimax	ELPT	125	2di	60A	3	170	3	12.6	139.7
Evinrude E-TEC	E130DPXII	130	2di	133A	V4 60_	177	3	12.8	122.8
Yamaha	F130A	130	4i	35A	4	171	3	11.8	204.9
Honda	BF135AK2 LD	135	4i	40A	4	217	3	13.8	75.6
Mercury - Verado	L	135	4i sc	70A	4	231	2	15.4	336
Suzuki	DF140ATL	140	4i	40A	4	179	3	13.9	56
Tohatsu	M140A2 EPTOL	140	2c	27.5A	4	164	1	167.3	355.3
Evinrude E-TEC	E150DBXII	150	2di	133A	V4 60_	190	3	15.2	114.2
Evinrude E-TEC	E150DHLII	150 HO	2di	133A	V4 60_	190	3	15.2	114.2
Honda	BF150AK2 LD	150	4i	40A	4	217	3	13.8	75.6
Mercury	L EFI	150	4I	60A	4	206	3	13.8	115.2
Mercury	L EFI	150	2i		V6 60_	193	1	117.2	282.4
Mercury - Optimax Pro XS	L	150	2di	60A	V6 60_	195	3	14.2	107.6
Mercury - Verado	L	150	4i sc	70A	4	231	2	15.4	336
Mercury	L	150	4i	60A	4	206	3	14.5	160.1
Tohatsu	BFT150A	150	4i	40A	4	220	3est
Suzuki	DF150TL	150	4i	44A	4	215	3	14.1	85.9
Yamaha	F150LA	150	4i	35A	4	216	3	10.8	222.3
Yamaha - precision blend	150FETOL	150	2c	45A	V4 90_	198	1	130	354.8
Evinrude E-TEC	E175DPXII	175	2di	133A	V4 60_	190	3	15.2	114.2
Honda	BF175AK2 XD	175	4i	60A	4	267	3	11.9	105.2
Mercury - Optimax Pro XS	L	175	2DI	60A	V6 60_	229	3	15.1	92.8
Mercury - Verado	XL	175	4i sc	70A	4	239	2	12.1	278.8
Suzuki	DF175TL	175	4i	44A	4	215	3	14.1	85.9
Yamaha	F175LA	175	4i	50A	4	219	3	11	169.9
Yamaha - precision blend	175DETOX	175	2c	45A	V4 90_	198	1	122.5	241.8
Evinrude E-TEC	E200DHXII	200	2di	133A	V4 60_	190	3	15.2	114.2
Evinrude E-TEC	E200DHLII	200 HO	2di	133A	V6 90_	238	3	10.6	84.9
Evinrude E-TEC G2	E200LHO	200 HO	2di	133A	V6 74_	244	3	12.2	48.7
Honda	BF200AK2 XD	200	4i	60A	V6	267	3	11.9	105.2
Mercury	XL EFI	200	2i	60A	V6 60_	196	1	117.2	282.4
Mercury - Optimax	XL	200	2di	60A	V6 60_	225	3	15.1	92.8
Mercury - Optimax Pro XS	L	200	2di	60A	V6 60_	225	3	15.1	92.8
Mercury-Verado Pro	L	200	4i sc	70A	6	288	2	18.6	124.2
Mercury - Verado	XL 6	200	4i sc	70A	6	294	2	15.1	278.8
Mercury - Verado	L 4	200	4i sc	70A	4	239	2	17.7	119.8
Suzuki	DF200TX	200	4i	54A	V6 55_	263	3	12.9	200.4
Suzuki	DF200A	200	4i	44A	4	215	3	14.1	85.9
Tohatsu	BFT200	200	4i	60A	V6	270	3	11.9	105.2
Yamaha	F200XB	200	4i	50A	4	227	3	7.4	196.6
Yamaha	LF200XA	200	4i	45A	V6 90_	283	3	12.7	199.9
Yamaha - precision blend	200FETOX	200	2c	25A	V6 90_	198	1	122.5	241.8
Evinrude E-TEC	E225DPZII	225	2di	133A	V6 90_	238	3	10.6	84.9
Evinrude E-TEC	E225DHXII	225 HO	2di	133A	V6 90_	238	3	10.6	84.9
Evinrude E-TEC G2	Due November	225	2di	133A	V6 74_	253	3	12.2	48.7
Evinrude E-TEC G2	Due November	225 HO	2di	133A	V6 74_	244	3	12.2	48.7
Honda	BF225AK2 XD	225	4i	60A	V6	267	3	11.9	105.2
Mercury - Optimax Pro XS	XL	225	2DI	60A	V6 60_	229	3	15.1	92.8
Mercury - Verado	XL	225	4i sc	46A	V6 60_	294	3	15.1	92.8
Suzuki	DF225TX	225	4i	54A	V6 55_	263	3	12.9	200.4
Tohatsu	BFT225A	225	4i	60A	V6	270	3est
Yamaha	LF225XCA	225	4i	70A	V6 60_	253	3	10.4	219.8
Evinrude E-TEC	E250DPZII	250	2di	133A	V6 90_	238	3	10.6	84.9
Evinrude E-TEC	E250DHXII	250HO	2di	133A	V6 90_	234	3	10.6	84.9
Evinrude E-TEC G2	E250X	250	2di	133A	V6 74_	253	3	12.2	48.7
Evinrude E-TEC G2	E250LHO	250 HO	2di	133A	V6 74_	244	3	12.2	48.7
Honda	BF250A XD	250	4i	90A	V6	278	3	13.2	91.7
Mercury - Verado	XL	250	4i sc	46A	V6 60_	294	2	103.6	248.3
Mercury - Verado	XL Pro	250	4i sc	46A	V6 60_	294	2	103.6	248.3
Mercury - Optimax Pro XS	XL	250XS	2di	60A	V6 60_	229	3	15.1	92.8
Suzuki	DF250TX	250	4i	54A	V6 55_	263	3	12.9	200.4
Suzuki	DF250APX	250	4i	54A	V6 55_	274	3	12.9	200.4
Tohatsu	BFT250A	250	4i	90A	V6	284	3est
Yamaha	F250XCA	250	4i	70A	V6 60_	253	3	10.4	219.8
Evinrude E-TEC	E300DPZII	300	2di	133A	V6 90_	242	2	29.5	251
Evinrude E-TEC G2	E300L	300	2di	133A	V6 74_	253	3	12.2	48.7
Mercury - Verado	XL	300	4i sc	133A	V6 90_	294	2	15.1	278.8
Mercury - Verado	XL Pro	300	4i sc	46A	V6 60_	294	2	103.6	248.3
Suzuki	DF300APX	300	4i	54A	V6 55_	274	3	12.9	200.4
Yamaha	F300XCA	300	4i	70A	V6 60_	253	3	10.4	219.8
Mercury	XL	350	4i sc	133A	V6 90_	294	2	15.1	278.8
Yamaha	LF350XCB	350	4i	50A	V8 90_	365	3	9.2	216.1

Emissions data is mostly sourced from the USA EPA certification database. Each manufacturer conducts their own testing, to ISO8178 Test cycle E4 and submits the data to the USA EPA, for audit.
The star rating is our own scoring system, and is based on the CARB system.
- Zero Stars – over 250g/kw/hr HC+Nox
- One star - 64.8 to 250
- Two star – generally less than 64.8
- Three Star - generally less than 30, for up to 4hp and as low as 16.1 for the largest outboards.
For the mathematically inclined the two and three star scales are exponential: a sliding scale that asks for tougher standards for larger engines.

2 Star

Outboards that do not meet 3 Star may be rated 2 star which is identical to CARB 2 Star. The upper limit is not 64.8, but on a sliding scale from 64.8 for the smallest outboards down to 36.0 for the largest engines The formula, is

Where p is in kW a P>4.3kW

If p< 4.3kW the limit =64.8

3 Star

Starting at the highest level the 3 star is exactly equal to the CARB 3 Star scheme. The upper limit is not 30, but on a sliding scale from 30 for the smallest outboards down to 16.1 for the largest engines as illustrated in figure 1. The formulae for the limit of HC+NOx in g/kw/hr is:

Where p is in kW a P>4.3kW

If p<4.3kW the limit =30

AMEC, toward sustainable boating

Engine Database

Outboard database explained