QSC8.3 for Marine

Power 490 - 600 hp
365 - 447 kW

Torque 1327 - 1327 lb-ft
1799 - 1799 N•m

Certification RCD 2

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Applications

Marine Recreational Marine Marine Propulsion Engines Commercial Marine

Overview:

368-441 kW | 493-592 hp

Unmatched performance from industry-leading power density on this four-valve-per-cylinder engine
Increased durability from innovative engine design characteristics
Improved fuel economy and sociability from the high-pressure common-rail fuel system
Maximize vessel performance and access comprehensive vessel diagnostic information via SmartCraft® electronics
Peace of mind delivered by the Cummins Captain's
Briefing and global service network
Built at Rocky Mount Engine Plant in Rocky Mount, NC, U.S.

Configuration	In-line, 6-cylinder, 4-stroke diesel
Aspiration	Turbocharged / Aftercooled
Displacement	8.3 L (505 in³)
Bore & Stroke	114 X 135 mm (4.49 X 5.31 in)
Rotation	Counterclockwise facing flywheel
Fuel System	High Pressure Common Rail

Product Dimensions and Weight

Overall Length	mm (in)	1422.0	(55.99)
Length of Block	mm (in)	856.0	(33.70)
Overall Width	mm (in)	977.5	(38.48)
Overall Height	mm (in)	981.6	(38.65)
Weight	kg (lb)	896	(1975)

Dimensions may vary based on selected engine configuration.

Recreational Marine Propulsion Engines (Variable Speed Ratings)

Model	kW	MHP	BHP	Speed (RPM)	Rating	Emissions
QSC8.3	368	500	493	2600	High Output	IMO 2 \| EPA 3 \| RCD 2
QSC8.3	404	550	543	3000	High Output	IMO 2 \| EPA 3 \| RCD 2
QSC8.3	441	600	592	3000	High Output	IMO 2 \| EPA 3 \| RCD 2

Commercial and Light Duty Marine Propulsion Engines (Variable Speed Ratings)

Model	kW	MHP	BHP	Speed (RPM)	Rating	Emissions
QSC8.3-SW	368	500	493	2600	Intermittent	IMO 2
QSC8.3-SW	368	500	493	2600	Intermittent	IMO 2 \| EPA 3
QSC8.3-KC	368	500	493	2600	Intermittent	IMO 2 \| EPA 3
QSC8.3-SW	395	537	530	2800	Intermittent	IMO 2 \| EPA 3
QSC8.3-SW	441	600	592	2800	Light Duty Commercial	IMO 2 \| EPA 3
QSC8.3-KC	441	600	592	2800	Light Duty Commercial	IMO 2 \| EPA 3

For more information on marine ratings, click here. For more on marine emissions information, click here.

Engine Design – Unmatched performance from industry-leading power density on this four-valve-per-cylinder engine. Maximize vessel performance and access comprehensive vessel diagnostic information via SmartCraft® electronics. Peace of mind delivered by the Cummins Captain’s Briefing and global service network

Fuel System – Improved fuel economy and sociability from Cummins high pressure common rail fuel system; handed spin-on engine mounted fuel filter

Lubrication System – Handed spin-on engine mounted lube filter, cast aluminum oil pan

Cooling System – Sea water heat exchanger cooling system

Air Intake System – New Walker air filter significantly reduces noise

Exhaust System – Cast water cooled exhaust manifold for lower surface temperatures, safety and improved performance

Electronics – 12v and 24v Quantum System electronics feature a proven ECM to monitor operating parameters such as fuel consumption, duty cycle, engine load and speed, while providing diagnostics, prognostics and complete engine protection. Simplified electrical customer interface box for all vessel connections to reduce installation complexity

Certifications – Complies with U.S. EPA Tier 3 emissions regulations without the use of aftertreatment. Designed to meet the International Association of Classification Societies (IACS) and SOLAS requirements. Consult your local Cummins professional for a complete listing of available class approvals.

Optional Equipment

Engine Controls – Digital Throttle and Shift; Electronic Throttle and Shift (ETS) and optional potentiometer for mechanical controls
Instrumentation – SmartCraft® digital displays and/or analog gauges provide data on engine speed, oil pressure, engine load and more
Vessel System Integration – SmartCraft® monitors fluid level, vessel range, depth, vessel speed, rudder position, temperatures and more

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