Cummins QSB6.7 355HP Marine Diesel Engine

DescriptionNew Cummins QSB6.7 355HP Marine Diesel Engine for Sale at Coastal Wave MarineThe Cummins QSB6.7 355HP Marine Diesel Engine represents a refined balance of high output performance and long-term commercial durability. Supplied brand new by Coastal Wave Marine, this engine is delivered in full marine specification with genuine standard manufacturer accessories, ensuring proper configuration, regulatory compliance, and installation confidence.As part of the established Cummins Marine Engines portfolio, the QSB6.7 platform is built on a robust 6.7-litre inline six-cylinder architecture. The 355HP rating is engineered for vessels requiring stronger acceleration, improved cruising capability, and dependable torque under sustained load.Equipped with Bosch High-Pressure Common Rail (HPCR) fuel injection, advanced turbocharging, and seawater aftercooling, this engine provides efficient combustion, stable power delivery, and reduced operating emissions.Designed for Demanding Marine OperationsThe Cummins QSB6.7 355HP Marine Diesel Engine is frequently specified for:Offshore commercial workboatsPatrol and enforcement vesselsPassenger transport craftWindfarm and service vesselsPerformance motor yachtsSemi-planing and planing hull applicationsThe 355HP configuration delivers enhanced torque output compared to lower horsepower variants, supporting heavier vessels and higher sustained cruising speeds without compromising fuel efficiency or mechanical reliability.Operational strengths include:Immediate throttle responseStable RPM under variable loadReduced vibration for improved onboard comfortOptimized fuel efficiency across duty cyclesCompliance with EPA Tier 3 marine emissions standardsIntelligent Electronic Control SystemThe Cummins QSB6.7 marine propulsion engine integrates a sophisticated electronic control module (ECM) designed to continuously regulate engine performance and safeguard critical systems.The system monitors:Fuel injection timingEngine load and operational stressCooling and lubrication parametersRPM and throttle calibrationThis electronic management system enhances engine protection, reduces unexpected downtime, and supports preventative maintenance scheduling for both commercial and recreational operators.Strategic Repower UpgradeThe Cummins QSB6.7 355HP Marine Diesel Engine is a practical repower alternative for replacing:Cummins 6BTA 5.9 engines in the 300–350HP rangeMechanical QSB5.9 installationsComparable mid-range inboard diesel enginesIts installation footprint and mounting geometry allow efficient integration into existing engine rooms while delivering increased power density and modern emissions compliance.Coastal Wave Marine provides professional assistance with:Gear ratio compatibilityShaft alignment and driveline reviewCooling system configuration (heat exchanger or keel cooled)Mount positioning consultationDuty rating selection (M1, M2, M3 classifications)Standard Manufacturer Accessories IncludedEach new Cummins QSB6.7 355HP marine engine supplied by Coastal Wave Marine includes genuine standard manufacturer accessories, ensuring the engine is delivered as a complete marine propulsion unit.Standard components include:Marine heat exchanger cooling systemSeawater aftercoolerWet exhaust manifoldMarine electronic control module (ECM)Engine wiring harnessPrimary alternatorStarter motorFront engine mounts with isolatorsSAE flywheel housingFactory documentation and manualsThis guarantees proper marine specification rather than a converted industrial engine configuration.Flexible Configuration OptionsThe Cummins QSB6.7 355HP Marine Diesel Engine can be supplied in multiple configurations, including:Engine-only (bobtail specification)With ZF marine transmissionWith Twin Disc marine gearboxComplete propulsion package with integrated controlsHeat exchanger cooled versionKeel cooled configurationSlimline configuration for restricted engine roomsEach configuration is reviewed against vessel displacement, hull design, and operational profile to ensure optimal propulsion performance.International Supply and Export CapabilityCoastal Wave Marine supports the global supply of new Cummins marine diesel engines, offering:Professional export cratingCommercial documentationFreight coordinationDelivery to shipyards, marinas, and ports worldwideWe regularly supply marine propulsion systems across North America, Europe, the Caribbean, the Middle East, Asia-Pacific, and Africa.Technical Specifications – Cummins QSB6.7 355HPSpecificationDetailsEngine ModelCummins QSB6.7Power Output355 HPConfigurationInline 6-Cylinder, 4-Stroke DieselDisplacement6.7 LitresAspirationTurbocharged / Seawater AftercooledFuel SystemBosch High-Pressure Common RailCoolingHeat Exchanger Cooled (Keel Cooling Optional)Emissions ComplianceEPA Tier 3 Marine CertifiedElectrical System12V or 24V OptionsRotationCounterclockwise (Facing Flywheel)Why Choose Coastal Wave MarineCoastal Wave Marine specializes in the supply of brand-new Cummins marine engines with transparent configuration and technical accuracy.Our service includes:Verified new engine sourcingRepower planning assistancePropulsion package configurationInternational logistics managementProfessional technical supportWhen selecting the Cummins QSB6.7 355HP Marine Diesel Engine, proper configuration and dependable supply are essential. Coastal Wave Marine ensures every engine is correctly specified, documented, and prepared for reliable marine operation.