Cummins QSB6.7 330HP Marine Diesel Engine

The Cummins QSB6.7 330HP Marine Diesel Engine is a powerful and fuel-efficient marine propulsion engine engineered for demanding commercial marine operations and performance-focused recreational vessels. Supplied brand new by Coastal Wave Marine, this engine is delivered in full marine specification with genuine standard manufacturer accessories, ensuring reliability, compliance, and installation integrity.

Part of the globally trusted Cummins Marine Engines portfolio, the QSB6.7 330HP is built on the proven 6.7-litre inline six-cylinder platform. It combines Bosch High-Pressure Common Rail (HPCR) fuel injection, advanced turbocharging, and seawater aftercooling to deliver clean combustion, responsive torque, and stable load handling across a wide operating range.

This horsepower rating is particularly popular for operators who require higher cruising speeds and improved acceleration without sacrificing durability or fuel economy.

Designed for Commercial and Performance Applications

The Cummins QSB6.7 330HP Marine Diesel Engine is widely selected for:

• Commercial workboats

• Fast pilot boats

• Patrol and enforcement vessels

• Windfarm support craft

• Passenger vessels

• High-performance motor yachts

• Semi-planing and planing hulls

The 330HP configuration offers enhanced torque output compared to lower ratings in the QSB6.7 range, making it well suited for heavier displacement vessels requiring reliable mid-to-high range propulsion power.

Key operational advantages include:

• Strong low- and mid-range torque

• Smooth throttle response

• Reduced vibration and improved onboard comfort

• Optimized fuel efficiency for commercial duty cycles

• Compliance with EPA Tier 3 marine emissions standards

Advanced Electronic Marine Control System

The Cummins QSB6.7 marine diesel engine utilizes a fully integrated electronic control module (ECM) to monitor and manage critical operating parameters, including:

• Engine load and duty cycle

• Fuel consumption

• RPM stability

• Temperature and pressure systems

This intelligent system enhances engine protection, supports predictive maintenance, and ensures consistent performance under variable marine operating conditions.

Repower-Optimized Configuration

The Cummins QSB6.7 330HP Marine Diesel Engine is a strategic repower solution for replacing:

• Cummins 6BTA 5.9 engines

• Mechanical QSB5.9 platforms

• 300–350HP inboard diesel propulsion systems

Its compact installation footprint and accessible service points simplify retrofitting into existing engine rooms while delivering improved power density and modern emissions compliance.

Coastal Wave Marine provides professional support for:

• Gear ratio selection and matching

• Shaft alignment and compatibility assessment

• Cooling system selection (heat exchanger or keel cooled)

• Mounting configuration review

• Duty rating consultation (M1, M2, M3 classifications)

Standard Manufacturer Accessories Included

Each new Cummins QSB6.7 330HP marine engine supplied by Coastal Wave Marine includes genuine standard manufacturer accessories, ensuring full marine propulsion specification.

Standard configuration includes:

• Marine heat exchanger cooling system

• Seawater aftercooler

• Wet exhaust manifold

• Marine electronic control module (ECM)

• Engine wiring harness

• Primary alternator

• Starter motor

• Front engine mounts with isolators

• SAE flywheel housing

• Factory manuals and documentation

This guarantees that the engine is delivered as a fully configured marine diesel propulsion engine, not a base industrial conversion.

Configuration Flexibility

The Cummins QSB6.7 330HP Marine Diesel Engine is available in multiple supply configurations to match vessel requirements:

• Engine-only (bobtail configuration)

• With ZF marine gearbox

• With Twin Disc marine transmission

• Complete propulsion package with electronic controls

• Heat exchanger cooled system

• Keel cooled configuration

• Slimline variant for restricted engine room installations

Our team works closely with vessel owners, shipyards, and commercial operators to ensure correct configuration and performance alignment.

Global Logistics and Export Support

As an international supplier of new Cummins marine diesel engines, Coastal Wave Marine provides:

• Professional marine crating

• Export documentation and commercial invoicing

• Coordination with international freight forwarders

• Delivery to shipyards, ports, and marinas worldwide

We supply engines across North America, Europe, the Caribbean, the Middle East, Asia-Pacific, and Africa, supporting both commercial operators and private vessel owners.

Technical Specifications – Cummins QSB6.7 330HP

Why Purchase from Coastal Wave Marine

Coastal Wave Marine specializes in supplying brand-new Cummins marine engines with transparent configuration, genuine accessories, and professional support.

We provide:

• Verified new engine supply

• Repower consultation and configuration support

• Complete propulsion package options

• Global logistics coordination

• Clear technical documentation

When investing in a Cummins QSB6.7 330HP Marine Diesel Engine, proper configuration and reliable supply are essential. Coastal Wave Marine ensures every engine is correctly specified, documented, and prepared for dependable marine service.