Cummins QSB6.7 250HP Marine Diesel Engine

Description

Buy Cummins QSB6.7 250HP Marine Diesel Engine – Coastal Wave Marine

The Cummins QSB6.7 250HP Marine Diesel Engine is a proven, electronically controlled marine propulsion engine designed for both commercial marine applications and high-end recreational vessels. Supplied brand new by Coastal Wave Marine, this engine is delivered in full marine configuration with genuine standard manufacturer accessories, ensuring compliance, durability, and installation integrity.

Built on Cummins’ globally recognized 6.7-litre inline six-cylinder platform, the Cummins QSB6.7 marine engine delivers clean, efficient power in the 250 horsepower class. It combines Bosch High-Pressure Common Rail (HPCR) fuel injection, turbocharging, and seawater aftercooling to provide optimal torque delivery, low fuel consumption, and reduced emissions in demanding marine environments.

This model is widely specified in commercial workboats, patrol vessels, pilot craft, passenger vessels, and long-range cruising yachts requiring reliable, continuous-duty propulsion.

Engineered for Commercial Reliability and Global Compliance

The Cummins QSB6.7 250HP is engineered to meet the operational demands of:

• Commercial workboats

• Fast pilot boats

• Windfarm support vessels

• Passenger ferries

• Patrol and enforcement vessels

• Displacement and semi-planing yachts

With its electronically managed fuel system and marine-rated cooling configuration, the engine offers:

• Clean combustion with reduced visible smoke

• Low vibration and quiet idle characteristics

• Strong low-end torque for displacement hulls

• Stable load handling for continuous duty cycles

• Compliance with EPA Tier 3 marine emissions standards

Cummins’ global service network supports the QSB6.7 platform worldwide, ensuring parts availability and technical support in major marine markets.

Intelligent Repower Solution

The Cummins QSB6.7 250HP Marine Diesel Engine is a practical and performance-enhancing repower replacement for:

• Cummins 6BTA 5.9

• Early mechanical QSB5.9 engines

• Other 230–300HP inboard diesel propulsion engines

The 6.7L platform provides improved torque density, modern electronic management, and enhanced fuel efficiency while maintaining a compact installation footprint. For repower projects, Coastal Wave Marine provides technical assistance with:

• Gear ratio compatibility

• Shaft sizing review

• Engine bed and mount assessment

• Duty rating selection (M1, M2, M3)

• Cooling configuration planning

This ensures the engine is properly matched to vessel displacement and operational requirements.

Standard Manufacturer Accessories Included

Each new Cummins QSB6.7 250HP marine engine supplied by Coastal Wave Marine includes genuine standard manufacturer accessories, not aftermarket substitutions.

Standard marine configuration includes:

• Heat exchanger marine cooling system

• Seawater aftercooler

• Wet exhaust manifold

• Marine electronic control module (ECM)

• Engine wiring harness

• Primary alternator

• Starter motor

• Front engine mounting brackets with isolators

• SAE flywheel housing

• Factory documentation and manuals

This ensures the engine is delivered as a true marine-rated propulsion unit, not an industrial base engine adapted for marine use.

Configuration Flexibility

Coastal Wave Marine supplies the Cummins QSB6.7 250HP in multiple configurations to meet varying operational requirements:

• Engine-only (bobtail configuration)

• Engine with ZF marine gearbox

• Engine with Twin Disc marine transmission

• Complete propulsion package with electronic controls

• Heat exchanger cooled configuration

• Keel cooled configuration

• Slimline variant for restricted engine room installations

Optional additions such as electronic control systems, filtration upgrades, and gearbox packages can be configured according to vessel specifications.

Global Supply and Logistics

Coastal Wave Marine provides international supply of new Cummins marine diesel engines, including:

• Professional marine crating

• Export documentation

• Commercial invoicing

• Coordination with freight forwarders

• Port and shipyard delivery support

We regularly supply marine engines to North America, Europe, the Caribbean, the Middle East, Asia-Pacific, and Africa.

Technical Specifications – Cummins QSB6.7 250HP

Why Purchase from Coastal Wave Marine

Coastal Wave Marine specializes in the supply of new commercial and recreational marine engines, providing:

• Verified new engine supply

• Technical configuration assistance

• Repower project consultation

• Global logistics coordination

• Clear documentation and transparent specifications

When investing in a Cummins QSB6.7 250HP Marine Diesel Engine, correct specification, genuine marine configuration, and professional supply are essential. Our team ensures each engine is properly configured, documented, and supported for long-term operational reliability.