Cummins QSL 9 525HP Marine Diesel Engine
Original price was: $44,899.00.$42,654.05Current price is: $42,654.05.
- Description
Description
Cummins QSL9 Marine Diesel Engine
8.9L Common Rail Power for Inboard Marine Propulsion
The Cummins QSL9 marine diesel engine combines an 8.9-litre inline six-cylinder platform with turbocharging, aftercooling and electronically controlled fuel injection. For vessel owners planning an inboard engine replacement or marine repower, the starting point is a configuration that matches the boat’s operating demands. mart.cummins.com
Enquire with MSS Motorsports UG for a Cummins QSL9 quotation based on your vessel, required output and installation requirements. Request the engine identification, documented marine rating and equipment scope alongside the price, so you can assess the complete proposal.
Technical Specifications
| Specification | QSL9 Platform Details |
|---|---|
| Manufacturer and model | Cummins QSL9 |
| Engine configuration | Inline six-cylinder, four-stroke diesel |
| Displacement | 8.9 litres |
| Bore × stroke | 114 × 145 mm |
| Fuel system | High-pressure common rail, electronically controlled |
| Aspiration | Turbocharged and aftercooled |
| Application | Inboard marine propulsion |
| Power, rated speed and duty | Confirm against the individual engine’s marine rating documentation |
| Cooling configuration | Heat exchanger or keel cooling, depending on the version |
Electronic Fuel Control and Engine Monitoring
The QSL9’s high-pressure common rail fuel system controls injection electronically. Cummins identifies reduced noise and vibration and faster load acceptance among the system’s benefits.
The Cummins Quantum ECM monitors operating information including engine speed, load, fuel consumption and duty cycle, with diagnostic functions to support troubleshooting. Cummins lists 12V and 24V electronic configurations and optional C Command instrumentation.
For the manufacturer’s platform information, see the Cummins QSL9 marine engine specifications. Confirm which electrical system, displays, harnesses and controls are included in the quoted package. Cummins Inc.
Match the Marine Rating to Your Workload
Horsepower and duty rating must be assessed together. A vessel that spends long periods under load needs an engine rating appropriate to that operating pattern.
Cummins’ 2025 Marine Products Guide includes these QSL9 commercial configurations:
| Published Duty Rating | Power | Rated Speed |
|---|---|---|
| Continuous | 213 kW / 290 MHP | 1,800 rpm |
| Heavy Duty | 246 kW / 335 MHP | 1,800 rpm |
| Medium Continuous | 302 kW / 410 MHP | 2,100 rpm |
| Medium Continuous, heat-exchanger configuration | 336 kW / 455 MHP | 2,100 rpm |
MHP means metric horsepower. These are published reference configurations; the offered engine’s rating requires confirmation. mart.cummins.com
For fishing vessels, workboats, passenger craft or cruising boats, provide your expected operating hours, typical load and time at full power. These details help establish the appropriate propulsion specification.
For another listed configuration, compare the Cummins QSL9 405HP marine engine and request its documented horsepower standard, rated speed and duty classification.
Plan Your Gearbox and Marine Repower Installation
A successful engine replacement depends on the complete drivetrain. Ask your installer to assess the transmission’s input rating, duty capacity, reduction ratio, coupling and mounting arrangement against the proposed engine.
Before ordering, establish:
- Engine-room fit: Installation dimensions, service access and lifting clearance.
- Shaft and propeller requirements: Gear ratio, shaft alignment and propeller load.
- Cooling and exhaust arrangements: Cooling-system capacity, seawater connections and exhaust routing.
- Helm integration: Control system, instrumentation, electrical supply and station requirements.
An existing gearbox should be assessed for reuse against the selected configuration.
Get a Clear Price and Equipment Scope
Compare quotations using the same package boundaries. Establish whether the price covers the engine alone or also includes the marine gearbox, mounts, instrument panel, wiring harness, controls and installation accessories.
Request written confirmation of:
- Engine serial number, condition and any recorded operating hours.
- Available inspection records and test documentation.
- Included equipment and separately priced options.
- Applicable warranty provider, duration, exclusions and commissioning requirements.
- Dispatch location, estimated lead time, freight charges and delivery terms.
This information helps you compare the full purchase and installation cost.
Frequently Asked Questions
Is a Cummins QSL9 525HP marine rating confirmed?
The Cummins marine rating documents reviewed do not verify a 525HP QSL9 configuration. Request a manufacturer-issued marine rating sheet tied to the engine identification before ordering against that output. Cummins Inc.
Is every QSL9 suitable for continuous commercial operation?
The QSL9 family includes different duty ratings. Continuous operation must be supported by the specific engine’s approved rating and operating requirements. Cummins Inc.
Does the engine include a gearbox and manufacturer warranty?
Confirm both in the written quotation. Equipment scope and warranty eligibility depend on the individual engine and supply arrangement.
Request Your Cummins QSL9 Quote
Contact MSS Motorsports UG for a Cummins QSL9 quotation. Include your vessel type, current engine, target performance, intended duty, annual operating hours, gearbox or drive model and ratio, preferred controls and purchase timing.
Provide your billing and delivery addresses for a location-specific proposal. If you are replacing an existing QSL9, include its serial number and a clear photograph of the engine data plate.