| Manufacturer / Brand | Cummins Marine |
| Model Designation | QSC8.3 Commercial Workboat |
| Engine Type | 4-Stroke Heavy-Duty Commercial Marine Diesel |
| Cylinder Configuration | Inline-6 Cylinder |
| Total Displacement | 8.3 Liters (505 cu in) |
| Bore x Stroke | 114 x 135 mm (4.49 x 5.31 in) |
| Aspiration & Charge Air | Turbocharged with Water-Cooled Charge Air Aftercooler |
| Cooling System Architecture | Heavy-Duty Marine Heat Exchanger (Keel Cooling Closed Grid Architecture Optional) |
| Continuous Power Rating (P1) | 493 BHP (368 kW) @ 2,600 RPM |
| Maximum / Intermittent Power (P3/P4) | 493 BHP (368 kW) @ 2,600 RPM (Dedicated Continuous Commercial Rating) |
| Fuel Injection Platform | Bosch High-Pressure Common Rail (HPCR) Injection System with CM850 ECM |
| Cylinder Head Metallurgy | Single-Piece Cast Iron 24-Valve Cylinder Head (4 Valves per Cylinder) |
| Cylinder Liners | Replaceable Wet Sleeve Cast Iron Cylinder Liners |
| Flywheel Housing & Flywheel | SAE 2 or SAE 3 Flywheel Housing with SAE 11.5 Flywheel |
| Electrical System & Ground | 24V Isolated Ground Marine Electrical System |
| Starter & Alternator Output | 24V 7.5 kW Electric Starter / 24V 70A Marine Alternator |
| Lube Oil Sump Capacity | 23.8 Liters (6.3 US gal) Deep Commercial Sump |
| Engine Coolant Capacity | 37.9 Liters (10.0 US gal) |
| Dry Weight (excl. gearbox) | 896 kg (1,975 lbs) |
| Overall Dimensions (L x W x H) | 1,422 x 851 x 981 mm (56.0 x 33.5 x 38.6 in) |
| Emissions Certification | EPA Marine Tier 3, IMO Tier II, EU Stage IIIA Compliant |
| Fuel Compatibility | Ultra-Low Sulfur Diesel (ULSD No. 2), MGO DMA/DMB, Biodiesel blends up to B20 |
| Transmission / Outdrive Compatibility | Bare Engine Bobtail - Compatible with Twin Disc MG-5075A, ZF 286A, or ZF 325A |
| Factory Warranty Period | 2-Year / 2,000-Hour Commercial Marine Warranty |
| Application Research | Harbor service tugs, pushboats, commercial passenger ferries, marine construction workboats, and aquaculture supply vessels |
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