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Sailboat - 3-53 fuel Consumption

Feedback: Can anyone give me the GPH used by a naturally aspirated Detroit Diesel 3-53? It is used in a 50 year old sailboat and is running around 1800 rpm.

Is the weight of a naturally aspirated 3-53 about the same as a 3-53T, around 965 pounds?

Thanks

John

Country: USA

City: San Diego

Hi John,

Re: 3-53T weight

3-53T spec-sheet weight = 1000 lbs or 455 Kg

Re: 3-53 fuel consumption

I've extracted the following tables from my notes. I have not checked them against other data, but should nevertheless answer your GPH question.

Those tables are a bit modified now, because while we're busy with it, we might as well update the 3-53 Detroit Diesel Specs at the same time:

3-53 Detroit Diesel Engine Specs, at sea level.
Description	3-53N				Description	3-53T
RPM	1500	2000	2500	2800	RPM	1400	2000	2500
Horse Power SAE	60	78	95	101	Horse Power SAE	82	115	131
Power Kw	45	58	71	75	Power Kw	61	86	98
Torque Ft lbs	202	202	191	184	Torque Ft lbs	229	226	206
Torque Nm	274	274	259	249	Torque Nm	311	306	279
Fuel Consumption rate lbs per HP hour	0.480	0.455	0.440	0.440	Fuel Consumption rate lbs per HP hour	0.410	0.383	0.400
Fuel Consumption litres per hour	15.3	18.9	22.3	23.7	Fuel Consumption litres per hour	17.9	23.5	27.9
Fuel Consumption US gallons per hour	4.04	4.99	5.89	6.26	Fuel Consumption US gallons per hour	4.73	6.21	7.37
Max Toque Ft lbs	205 @ 1560 RPM				Max Toque Ft lbs	312 @ 1600 RPM
Max Toque Nm	278 @ 1560 RPM				Max Toque Nm	423 @ 1600 RPM

3-53 Marine Engine Specs, at sea level.
Description	3-53, Continuous Power			Description	3-53, Rated Shaft Power
RPM	1400	2000	2400	RPM	1400	2000	2500	2800
Continuous (SHP) Shaft HP	47	60	73	Rated (SHP) Shaft HP	50	72	86	92
Rated Shaft Power Kw	35	45	54	Rated Power Kw	37	54	64	69
Continuous - Fuel Consumption litres per hour	11.7	15.1	17.8	RATED SHP - Fuel Consumption litres per hour	14.4	18.5	22.0	23.5
Continuous - Fuel Consumption US gallons per hour	3.1	4.0	4.7	RATED SHP - Fuel Consumption US gallons per hour	3.8	4.9	5.8	6.2
Propeller - Continuous Load HP SAE	15	47	73	Propeller - Shaft HP SAE	12	38	60	92
Propeller - Continuous Load Kw	11	35	54	Propeller - Shaft Load Kw	9	28	45	69
PROPELLER - Fuel Consumption litres per hour	4.9	11.0	18.1	PROPELLER - Fuel Consumption litres per hour	4.9	10.6	17.8	23.5
PROPELLER - Fuel Consumption US gallons per hour	1.3	2.9	4.8	PROPELLER - Fuel Consumption US gallons per hour	1.3	2.8	4.7	6.2