Cummins QSC 8.3 550HP Inboard Marine Engine
$48,988.00
- Description
Description
Cummins QSC 8.3 550HP Inboard Marine Diesel Engine
The Cummins QSC 8.3 550HP Inboard Marine Engine is a high-output marine propulsion diesel engine engineered for vessels that demand powerful acceleration, high torque, and reliable continuous-duty performance. Built on the proven Cummins QSC 8.3 platform, this 8.3-liter inline six-cylinder turbocharged marine diesel engine delivers exceptional power density and operational efficiency for sportfishing yachts, patrol boats, offshore service vessels, and commercial fishing boats.
The Cummins QSC 8.3 series is widely recognized in the marine industry for its advanced electronic engine management, high-pressure common rail fuel system, and durable marine-grade construction, providing vessel operators with a dependable propulsion solution capable of operating in demanding offshore environments. The engine is designed to deliver 550 horsepower of reliable propulsion output, making it ideal for high-performance vessels that require strong acceleration and sustained cruising speeds.
At Coastal Wave Marine, the Cummins QSC 8.3 550HP marine diesel engine is supplied as a brand-new genuine Cummins marine propulsion engine, delivered with standard manufacturer accessories and available configuration options for both new vessel construction and marine repower installations.
Engine Design and Performance
The Cummins QSC 8.3 marine engine features an inline 6-cylinder, 24-valve cylinder head architecture, improving airflow and combustion efficiency while producing strong mid-range torque and smooth power delivery. The engine uses High-Pressure Common Rail (HPCR) fuel injection, which precisely controls fuel delivery for improved fuel economy, reduced emissions, and faster throttle response.
The engine’s turbocharged and aftercooled air intake system increases intake air density, improving combustion efficiency and enabling the engine to generate 550 horsepower of marine propulsion power while maintaining efficient operating temperatures.
Integrated Cummins Quantum electronic control systems continuously monitor critical operating parameters such as engine load, fuel consumption, temperature, and engine speed. This intelligent system provides diagnostics, protects engine components, and ensures optimal engine performance during demanding marine operations.
With its high power-to-weight ratio and compact installation footprint, the Cummins QSC 8.3 550HP inboard diesel engine is widely selected for boat repowering projects and high-performance propulsion applications where reliability and performance are essential.
Cummins QSC 8.3 550HP Marine Engine Specifications
| Specification | Details |
|---|---|
| Engine Model | Cummins QSC 8.3 Marine Diesel |
| Rated Power | 550 HP (≈410 kW) |
| Rated Speed | Up to 3000 RPM |
| Engine Configuration | Inline 6-Cylinder, 4-Stroke Diesel |
| Displacement | 8.3 Liters (505 cu in) |
| Bore × Stroke | 114 mm × 135 mm |
| Aspiration | Turbocharged and Aftercooled |
| Fuel System | High-Pressure Common Rail (HPCR) |
| Electronic Control | Cummins Quantum ECM |
| Maximum Torque | Up to 1695 lb-ft (≈2299 Nm) |
| Cooling System | Heat Exchanger or Keel Cooling |
| Rotation | Counterclockwise (facing flywheel) |
| Approx. Dry Weight | ~896–1016 kg depending on configuration |
| Application | Inboard Marine Propulsion |
| Engine Condition | New |
| Manufacturer | Cummins Marine |
The QSC 8.3 propulsion engine family typically delivers 493–600 horsepower ratings, allowing vessel operators to select configurations that match vessel speed, displacement, and duty cycle requirements.
Key Technical Features
High-Power Marine Propulsion
The Cummins QSC 8.3 550HP diesel engine delivers strong torque and rapid throttle response, making it suitable for high-speed vessels and heavy-duty marine operations.
High-Pressure Common Rail Fuel System
The HPCR injection system improves combustion efficiency and fuel atomization, resulting in improved fuel economy, smoother engine operation, and reduced emissions.
Advanced Electronic Engine Management
The Cummins Quantum ECM monitors fuel delivery, engine load, operating speed, and temperature to optimize performance and provide advanced diagnostics.
Turbocharged Aftercooled Air System
The turbocharger and aftercooler increase intake airflow density, allowing the engine to maintain consistent horsepower output even under heavy load conditions.
Heavy-Duty Marine Construction
The engine incorporates a cast-iron block, gallery-cooled pistons, marine-grade cooling systems, and corrosion-resistant components designed for continuous marine duty.
Typical Vessel Applications
The Cummins QSC 8.3 550HP inboard marine diesel engine is widely installed in:
Offshore sportfishing yachts
High-performance cruising boats
Commercial fishing vessels
Patrol and security boats
Offshore service vessels
Passenger transport boats
Buyers searching online for Cummins marine engines for sale, 550HP marine diesel engines, Cummins inboard propulsion engines, or Cummins boat engines for repower projects frequently select the QSC series due to its proven reliability and performance in demanding marine applications.
Global Supply from Coastal Wave Marine
Coastal Wave Marine supplies new Cummins marine propulsion engines, marine generators, marine gearboxes, and complete propulsion systems to shipyards, vessel operators, and commercial marine fleets worldwide.
Our supply services include:
Global shipping and export logistics
Professional export crating for sea or air freight
Marine transmission pairing options
Engine configuration consultation
Support for vessel repower and new vessel construction
Customers searching for buy Cummins marine engines online, Cummins QSC 8.3 marine diesel engine suppliers, or marine propulsion engines for sale can rely on Coastal Wave Marine for professional service and international delivery.
If you are looking to buy a Cummins QSC 8.3 550HP Inboard Marine Diesel Engine, contact Coastal Wave Marine to request pricing, availability, and worldwide shipping options. Our team can assist with selecting the right Cummins marine propulsion engine for your vessel or fleet.