Overview
Cummins QSB7 Engine – Product Description
The Cummins QSB7 diesel engine is a high-performance, uprated version of the QSB6.7 engine family. 6.marketed as the “7 Liter Class” despite its 7 liter displacement, this engine is optimized for demanding marine applications, offering high power levels between 325 and 550 horsepower. QSB7 engines provide quiet, efficient and reliable high performance in both commercial and recreational marine applications, superyachts, yacht support vessels and auxiliary power units (50/60 Hz generator applications). With up to 80% noise reduction at idle and virtually zero smoke emissions thanks to high pressure common rail (HPCR) fuel system technology, this engine has been specially developed for the ultimate boating experience. SGS Power provides original spare parts, engine parts and comprehensive technical support for QSB7 engines under the Cummins Turkey authorized dealer warranty. The QSB7 engine family offers maximum performance with a new generation 24-valve cylinder head design, industry-leading power density and an optimized turbocharger system. Sharing the same engine block as the QSB6.7, the QSB7 is equipped with improved injection maps, high-pressure turbocharging and enhanced cooling capacity for higher power output. The Bosch HPCR fuel system offers the ability to safely run alternative fuels such as kerosene and JP8/JP5. Manufactured at the Darlington (UK) and Rocky Mount (USA) engine plants, the QSB7 engines are backed by Cummins’ global service network and Cummins Captain’s Briefing to guarantee a peace of mind marine experience. Complying with EPA Tier 3 emission standards without the use of a finishing process, the QSB7 is an environmentally friendly and high-performance power solution
Service and Maintenance
Professional QSB7 Periodic Maintenance and Overhaul Solutions
Regular periodic maintenance and professional service are critical for the optimal performance and long life of Cummins QSB7 engines. Due to their high power output, QSB7 engines require regular and professional maintenance, especially in demanding marine applications and when used as an auxiliary power unit. At SGS Power, we offer comprehensive maintenance, repair and overhaul services for your QSB7 engines through our infrastructure of authorized Cummins service centers and our technical team of experts in Quantum series high-performance engines. Our preventive maintenance programs extend the life of your engine, increase fuel efficiency and prevent unexpected failures. When using ULSD (Ultra Low Sulfur Diesel) fuels, the oil service interval is up to 500 hours. Our QSB7 engine overhaul service includes complete engine disassembly, inspection of all critical parts, replacement of worn or damaged parts with original Cummins spare parts and reassembly to OEM standards. Due to the high pressure common rail (HPCR) fuel system, optimized high pressure turbocharger and Quantum series electronic control systems, QSB7 engines require special expertise and advanced diagnostic equipment. Our team specializes in the differences of the QSB7 from the QSB6.7, such as higher power rating, different injection maps and turbo settings. With our technical information and advanced diagnostics support, we analyze your engine’s performance, read ECM (Electronic Control Module) data, diagnose problems and offer solutions. Our experienced service team performs all maintenance operations for all QSB7 models, including fuel system calibration, turbocharger maintenance, cooling system service, SmartCraft® electronic system integration and C Command HD panel systems.
QSB7 Engine Services
- Periodic Maintenance: Oil-filter change (front-mounted or remote filters), fuel system check, cooling system maintenance, 500-hour service interval with ULSD fuel
- General Overhaul Services (Overhaul): Complete engine overhaul, cylinder head service, 24 valve system maintenance, aluminum piston replacement, metric O-ring seal replacement
- Fuel System Service: Bosch HPCR (High Pressure Common Rail) system maintenance, high performance injector testing and calibration, high pressure fuel pump control, alternative fuel adaptation
- Turbocharger Maintenance and Repair: Water-cooled turbo overhaul (Cummins Turbo Technologies), aftercooler cleaning, Walker air filter replacement, high performance turbo calibration
- Technical Support: 24/7 technical consultancy, remote diagnostics, spare parts consultancy, Cummins Captain’s Briefing, parts identification based on engine serial number and power rating
- Electronic System Service: ECM (Electronic Control Module) diagnostics, SmartCraft® system integration and calibration, digital throttle and shift controls, C Command HD panel integration
- Auxiliary Engine Service: special service for 50/60 Hz generator applications, PTO (Power Take-Off) adapter maintenance, alarm and security system service
- Emergency Service Fault intervention in the field, emergency repair and spare parts supply in marine applications
- Diagnostic Services: Quantum system electronic analysis, high performance tests, emission measurements (IMO 2, EPA 3, RCD 2 standards), diagnostic and prognostic services, load acceptance tests
Product Spare Parts
Genuine Cummins QSB7 Spare Parts
At SGS Power, as an authorized Cummins dealer in Turkey, we only supply 100% genuine Cummins QSB7 spare parts. All the original parts we offer for your QSB7 engine parts needs come with Cummins factory warranty and quality certificates. Thanks to our working system based on engine serial number (ESN) and power rating (HP/kW rating), we guarantee the right part for your engine. QSB7 engines share the same engine block as QSB6.7, but as a high performance version, they use different turbochargers, different injector settings and advanced cooling components. Therefore, the engine serial number and power rating must be specified when ordering spare parts. Quantum series QSB7 engines require the use of original parts due to their high-tech HPCR fuel system and advanced electronic control systems. To avoid performance losses, emission problems, excessive fuel consumption and serious damage to your engine caused by the use of sub-industry or equivalent parts, we strongly recommend that you choose only Cummins genuine spare parts. With our extensive stock network and fast procurement system, we ensure the supply of QSB7 original spare parts as soon as possible, even in case of urgent needs.
Certificates and Approvals: QSB7 engines comply with IMO Tier 2, EPA Tier 3 and RCD 2 emission standards. They are designed to meet IACS (International Association of Classification Societies) and SOLAS requirements.
Alternative Fuel Compatibility: QSB7 engines can safely run on alternative fuels such as kerosene, JP8 and JP5 thanks to hardened Bosch HPCR components.
IMPORTANT WARNING: When ordering spare parts for QSB7 engines, the engine serial number (ESN) and exact power rating (e.g. 380 MHP @ 3000 RPM) must be specified. Although QSB6.7 and QSB7 share many parts, some critical components (turbo, injectors, ECM program) are different.
Note: QSB7 engines have part differences depending on model, power level (325-550 HP), application type (drive/auxiliary) and package configuration (standard or SL package). For correct parts identification, please specify your engine serial number (ESN) and power rating. All our spare parts stocks are updated regularly, please contact us for unlisted QSB7 engine parts.