Description
Cummins QSM11 700HP Marine Diesel Engine – Product Overview
The Cummins QSM11 700HP Marine Diesel Engine is a high-output inboard diesel engine designed for demanding marine propulsion applications. With 700 HP from a 10.8-liter inline 6-cylinder diesel platform, the QSM11 is built for vessels that require strong torque, reliable cruising power, and dependable long-term operation.
This engine features turbocharged and aftercooled performance, helping deliver strong combustion efficiency and power density. It also uses High-Pressure Common Rail, or HPCR, fuel injection for precise fuel delivery, smoother operation, and improved response.
The Cummins Quantum ECM provides electronic control and monitoring, supporting consistent engine management in marine operating conditions. Combined with heat exchanger cooling and seawater circuit operation, the QSM11 is designed for serious marine propulsion use.
For buyers comparing high-horsepower inboard diesel engines, the Cummins QSM11 700HP Marine Diesel Engine is a strong option for commercial vessels, sport fishing boats, cruisers, workboats, and repower projects.
Built for High-Output Inboard Marine Propulsion
The Cummins QSM11 700HP Marine Diesel Engine is built for inboard marine propulsion applications where strength, reliability, and torque matter. It is suitable for commercial boats, sport fishing vessels, express cruisers, passenger vessels, utility boats, and selected workboat applications.
With 700 HP, this engine offers the power needed for larger vessels that require strong acceleration, dependable cruising, and confident load-handling capability. Its inline 6-cylinder layout supports smooth power delivery, while the 10.8L displacement provides the engine capacity needed for demanding marine operation.
For repower buyers, the QSM11 is especially relevant when replacing an older diesel engine with a proven Cummins marine platform. Correct fitment, gearbox compatibility, engine bed layout, cooling setup, and electronic integration should be confirmed before purchase.
Customers can compare this product with related Cummins marine diesel engines, marine gearboxes, control systems, heat exchanger components, shafting systems, and repower installation parts.
10.8L Inline 6-Cylinder Diesel Platform
The Cummins QSM11 Marine Diesel uses an inline 6-cylinder, 4-stroke diesel configuration with a displacement of 10.8 liters, or approximately 661 cubic inches.
This engine layout is valued in marine propulsion because it combines smooth operation, strong torque, and practical serviceability. Inline 6-cylinder diesel engines are commonly used in commercial and performance marine applications because they deliver steady power with fewer moving cylinder banks than V-type engines.
The 125 mm × 147 mm bore and stroke supports the engine’s displacement and torque-focused marine performance. This helps the QSM11 deliver the pulling strength needed for larger vessels and heavier operating loads.
For buyers searching for a 10.8L Cummins marine diesel engine, the QSM11 provides a proven high-output platform.
Turbocharged and Aftercooled Performance
The Cummins QSM11 700HP Marine Diesel Engine is turbocharged and aftercooled, helping the engine produce strong power from its 10.8L displacement.
Turbocharging increases the amount of air entering the engine, while aftercooling helps reduce intake air temperature before combustion. This supports better air density, improved power delivery, and more efficient engine performance.
In marine use, strong air management is important because engines often operate under steady load for extended periods. A turbocharged and aftercooled system helps the engine maintain performance during cruising, acceleration, and demanding operating conditions.
For vessels that need dependable high-horsepower propulsion, this configuration gives the QSM11 the strength required for serious marine use.
High-Pressure Common Rail Fuel Injection
The Cummins QSM11 Marine Diesel uses High-Pressure Common Rail, or HPCR, fuel injection.
HPCR fuel systems deliver fuel with precision, helping improve throttle response, combustion control, efficiency, and operating smoothness. This is especially important in modern marine diesel engines where power, economy, emissions performance, and reliability all matter.
For operators, HPCR technology can support more consistent engine behavior across different rpm ranges and load conditions. It also helps the engine respond more effectively during acceleration, maneuvering, and cruising.
For customers comparing Cummins HPCR marine engines, the QSM11 700HP offers a strong combination of advanced fuel delivery and high-output diesel performance.
Cummins Quantum ECM Electronic Control
The Cummins QSM11 700HP Marine Diesel Engine is managed by a Cummins Quantum ECM, giving the engine electronic control for marine operation.
The ECM helps monitor and manage key engine functions, supporting consistent performance, diagnostics, and engine protection depending on the final installation and display configuration.
Electronic control is valuable in high-horsepower marine engines because it helps maintain precise fuel delivery, engine speed control, system monitoring, and operational consistency.
For repower projects, buyers should confirm compatibility with the vessel’s existing controls, gauges, wiring harnesses, alarm systems, and monitoring displays.
The Cummins Quantum ECM adds modern control capability to a proven Cummins marine diesel platform.
Strong Torque for Demanding Marine Loads
The Cummins QSM11 Marine Diesel is rated with peak torque up to approximately 2,300 Nm, depending on rating and final configuration.
Strong torque is critical in marine propulsion because boats operate under constant resistance from water. Unlike road vehicles, marine engines must push through load continuously, especially during acceleration, planing, cruising, and heavy sea conditions.
The QSM11’s torque characteristics make it suitable for vessels that need strong pulling power and dependable response under load. This can be valuable for sport fishing boats, commercial vessels, cruisers, and workboats.
Buyers should confirm the exact torque curve, rating duty cycle, gearbox match, and propeller selection for their specific vessel.
For customers searching for a 700HP marine diesel engine with strong torque, the Cummins QSM11 is a highly relevant option.
Heat Exchanger Cooling With Seawater Circuit
The Cummins QSM11 700HP Marine Diesel Engine uses a heat exchanger cooling system with seawater cooling.
In a marine heat exchanger setup, the engine’s internal coolant circuit is cooled through a heat exchanger, while seawater passes through the exchanger to remove heat. This helps protect internal engine components from direct seawater exposure while supporting stable operating temperature.
Proper cooling is essential for marine diesel reliability, especially in high-horsepower engines that run under sustained load.
Buyers should confirm heat exchanger condition, seawater pump setup, hoses, strainers, exhaust cooling, and installation requirements before operation.
For repower projects, cooling system compatibility should be reviewed carefully to ensure the vessel can support the engine’s heat rejection needs.
New Engine Condition for Repower Confidence
This Cummins QSM11 700HP Marine Diesel Engine is listed in new condition, making it attractive for boat owners, commercial operators, and repower buyers who want a fresh engine platform rather than a used or rebuilt unit.
A new marine engine can provide greater confidence in service life, component condition, installation planning, and long-term reliability. It also allows the vessel owner or installer to build the propulsion system around known specifications from the start.
For boatyards and marine technicians, a new engine can simplify project planning because there is less uncertainty around prior usage, wear history, or hidden internal condition.
Buyers should still confirm included accessories, warranty details, serial number, control package, gearbox options, and installation components before purchase.
Approximate Dry Weight and Installation Planning
The Cummins QSM11 700HP Marine Diesel Engine has an approximate dry weight of 1,188 kg, or about 2,620 lb.
Weight is an important consideration in marine repower planning. The engine’s mass affects vessel balance, engine bed strength, lifting requirements, access planning, transport, mounting, and overall installation layout.
Before purchase, buyers should confirm engine room dimensions, service access, lifting clearance, foundation strength, shaft alignment, gearbox selection, exhaust routing, and cooling system capacity.
Because this is a high-output inboard diesel engine, professional installation is strongly recommended.
Correct installation helps protect the engine, drivetrain, and vessel while supporting safe and reliable operation.
Why the Cummins QSM11 700HP Is a Smart Choice
The Cummins QSM11 700HP Marine Diesel Engine stands out because it combines 700 HP, a 10.8L inline 6-cylinder diesel platform, turbocharged and aftercooled performance, HPCR fuel injection, Cummins Quantum ECM control, heat exchanger cooling, and new engine condition.
Many buyers in this category need more than horsepower. They need a marine diesel engine that can deliver strong torque, reliable inboard propulsion, and proven performance in demanding conditions.
The QSM11’s displacement, electronic control, fuel system, and cooling configuration make it a strong fit for commercial vessels, sport fishing boats, cruisers, workboats, and serious repower projects.
For customers searching for a Cummins QSM11 700HP Marine Diesel Engine for sale, this engine offers a powerful and trusted Cummins marine propulsion solution.
Who Should Choose This Marine Diesel Engine
The Cummins QSM11 700HP Marine Diesel Engine is best for buyers who need a high-output 700HP marine diesel engine for inboard propulsion.
It is suitable for commercial operators, sport fishing boat owners, cruiser owners, workboat users, marine technicians, boatyards, and repower specialists.
This engine is especially useful for vessels requiring strong torque, dependable cruising power, electronic engine management, HPCR fuel delivery, and heat exchanger cooling.
Buyers who need a smaller engine, a lighter repower option, a different power rating, a full engine-and-gearbox package, or a different duty rating should compare other Cummins marine diesel models before purchase.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Cummins QSM11 700HP Marine Diesel Engine |
| Manufacturer | Cummins Marine |
| Engine Model | Cummins QSM11 Marine Diesel |
| Product Type | Marine diesel engine |
| Engine Condition | New |
| Rated Power | 700 HP |
| Engine Configuration | Inline 6-cylinder, 4-stroke diesel |
| Displacement | 10.8 liters / 661 cu in |
| Bore × Stroke | 125 mm × 147 mm |
| Aspiration | Turbocharged and aftercooled |
| Fuel System | High-Pressure Common Rail / HPCR |
| Electronic Control | Cummins Quantum ECM |
| Rated Engine Speed | Approx. 2300 RPM |
| Peak Torque | Up to approx. 2,300 Nm depending on rating |
| Cooling System | Heat exchanger with seawater cooling |
| Approx. Dry Weight | Approx. 1,188 kg / 2,620 lb |
| Application | Inboard marine propulsion |
| Recommended Vessel Types | Commercial vessels, sport fishing boats, cruisers, workboats, utility boats, repower applications |
| Best Fit | Vessels requiring 700HP inboard diesel power with strong torque and electronic control |
| Buyer Profile | Commercial operators, boatyards, marine technicians, sport fishing boat owners, cruiser owners, repower buyers |
| Main Benefits | 700HP power, 10.8L displacement, HPCR fuel injection, Quantum ECM, turbo aftercooling, heat exchanger cooling |
Key Product Details and Specifications
The Cummins QSM11 700HP Marine Diesel Engine delivers 700 HP from a 10.8L inline 6-cylinder, 4-stroke diesel platform.
The engine uses a turbocharged and aftercooled air system to support strong marine power delivery.
Its High-Pressure Common Rail fuel system provides precise fuel delivery for smoother operation and dependable response.
The Cummins Quantum ECM manages key engine functions and supports modern electronic control.
The engine is rated at approximately 2300 RPM, depending on final configuration and duty rating.
Peak torque may reach up to approximately 2,300 Nm, depending on the specific rating.
The cooling system uses a heat exchanger with seawater cooling, making it suitable for marine propulsion installations.
The engine has an approximate dry weight of 1,188 kg, or about 2,620 lb, so installation planning should include proper lifting, mounting, and alignment considerations.
This engine is listed in new condition and manufactured by Cummins Marine.
Buy With Confidence
When buying the Cummins QSM11 700HP Marine Diesel Engine, customers should confirm vessel application, engine rating, duty cycle, gearbox compatibility, mounting layout, shaft alignment, cooling capacity, exhaust routing, electronic control compatibility, display setup, fuel system requirements, and installation plan.
This model is a strong choice for buyers who want a Cummins QSM11 marine diesel engine with 700HP output, HPCR fuel injection, Quantum ECM control, turbocharged and aftercooled performance, and heat exchanger cooling.
Customers can compare this product with related Cummins marine diesel engines, compatible marine gearboxes, engine mounts, heat exchanger components, control panels, wiring harnesses, exhaust systems, and repower installation parts.
Professional installation is recommended. Correct alignment, gearbox selection, propeller matching, cooling setup, fuel filtration, electronic integration, and exhaust design help support safe operation, strong performance, and long engine life.
Frequently Asked Questions
What is the Cummins QSM11 700HP Marine Diesel Engine best used for?
The Cummins QSM11 700HP Marine Diesel Engine is best used for inboard propulsion in commercial vessels, sport fishing boats, cruisers, workboats, utility boats, and repower projects requiring high-output diesel power.
How much horsepower does the Cummins QSM11 produce?
This model is rated at 700 HP, making it a powerful option for demanding marine propulsion applications.
What is the displacement of the Cummins QSM11?
The Cummins QSM11 has a displacement of 10.8 liters, or approximately 661 cubic inches.
What fuel system does this engine use?
The engine uses High-Pressure Common Rail, or HPCR, fuel injection for precise fuel delivery, smooth response, and efficient operation.
Does the Cummins QSM11 have electronic control?
Yes, this engine uses a Cummins Quantum ECM for electronic engine control and management.
What cooling system does the Cummins QSM11 use?
The engine uses a heat exchanger cooling system with seawater cooling, making it suitable for marine inboard propulsion installations.
Is this Cummins QSM11 engine new?
Yes, this Cummins QSM11 700HP Marine Diesel Engine is listed in new condition.
