Cummins QSB6.7 305HP Marine Diesel Engine

Description

Cummins QSB6.7 305HP Marine Diesel Engine for Sale | Coastal Wave Marine

The Cummins QSB6.7 305HP Marine Diesel Engine is a high-performance, electronically controlled marine propulsion engine designed for demanding commercial marine applications and premium recreational vessels. Supplied brand new by Coastal Wave Marine, this engine is delivered in full marine configuration with genuine standard manufacturer accessories, ensuring installation integrity, compliance, and long-term durability.

Part of the trusted Cummins Marine Engines range, the QSB6.7 platform is built on a robust 6.7-litre inline six-cylinder block, delivering responsive torque, fuel efficiency, and dependable operation in the 305 horsepower rating. It combines Bosch High-Pressure Common Rail (HPCR) fuel injection, turbocharging, and seawater aftercooling to optimize combustion efficiency and reduce emissions while maintaining strong load-carrying capability.

This model is widely selected for vessels requiring reliable mid-range power with modern electronic engine management and global service support.

Designed for Commercial and Recreational Marine Applications

The Cummins QSB6.7 305HP is commonly specified in:

• Commercial workboats

• Fast pilot vessels

• Patrol and enforcement craft

• Passenger boats

• Windfarm support vessels

• Performance cruising yachts

• Semi-planing hull applications

With enhanced torque output over the 250HP variant, the 305HP configuration offers improved acceleration and higher cruising speeds without sacrificing fuel efficiency or reliability.

Key performance advantages include:

• Smooth throttle response and stable load handling

• Reduced visible smoke and cleaner combustion

• Low vibration levels and improved onboard comfort

• Efficient fuel consumption for extended duty cycles

• Compliance with EPA Tier 3 marine emissions standards

Advanced Marine Engineering Platform

The Cummins QSB6.7 marine diesel engine is engineered to deliver performance under continuous-duty conditions. Its electronically managed fuel system ensures optimal injection timing and combustion control, providing better efficiency and reduced maintenance intervals compared to older mechanical diesel engines.

The integrated electronic control module (ECM) continuously monitors operating parameters such as:

• Engine load

• Fuel consumption

• Operating temperature

• RPM stability

This intelligent monitoring enhances engine protection and supports preventive maintenance planning.

Proven Repower Upgrade Solution

The Cummins QSB6.7 305HP Marine Diesel Engine is a highly effective repower solution for replacing:

• Cummins 6BTA 5.9 (300HP range)

• Early mechanical QSB5.9 engines

• Comparable 280–320HP marine diesel engines

Its compact footprint and accessible service points simplify installation while delivering improved torque density, cleaner emissions, and more advanced electronic controls.

Coastal Wave Marine provides technical support for:

• Gear ratio matching

• Shaft compatibility review

• Engine mount alignment

• Cooling system selection (heat exchanger or keel cooled)

• Duty rating consultation (M1, M2, M3)

This ensures your repower project is correctly configured from the outset.

Standard Manufacturer Accessories Included

Each new Cummins QSB6.7 305HP marine engine supplied by Coastal Wave Marine includes genuine standard manufacturer accessories, ensuring a complete marine-rated propulsion unit.

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 the engine is delivered in true marine propulsion configuration, not an industrial conversion.

Configuration Flexibility

The Cummins QSB6.7 305HP Marine Diesel Engine can be supplied in multiple configurations to meet specific vessel requirements:

• Engine-only (bobtail configuration)

• With ZF marine gearbox

• With Twin Disc marine transmission

• Complete propulsion package with electronic controls

• Heat exchanger cooled version

• Keel cooled configuration

• Slimline configuration for limited engine room space

Our technical team ensures compatibility with your vessel’s hull type, displacement, and operational profile.

Global Supply and Export Support

Coastal Wave Marine supplies new Cummins marine diesel engines to customers worldwide, offering:

• Secure marine crating

• Export documentation and commercial invoicing

• Coordination with international freight forwarders

• Delivery to shipyards, ports, and marinas globally

We support commercial operators, shipbuilders, and private yacht owners across North America, Europe, Asia-Pacific, the Caribbean, the Middle East, and Africa.

Technical Specifications – Cummins QSB6.7 305HP

Why Buy Your Cummins QSB6.7 305HP from Coastal Wave Marine

Coastal Wave Marine specializes in supplying brand-new Cummins marine engines for commercial and recreational marine applications.

We provide:

• Verified new engine supply

• Professional configuration assistance

• Repower consultation

• Global logistics management

• Transparent documentation and technical support

When investing in a Cummins QSB6.7 305HP Marine Diesel Engine, correct specification and trusted supply are essential. Coastal Wave Marine ensures each engine is properly configured, fully documented, and ready for dependable marine operation.