The Cummins QSB6.7 250HP Marine Diesel Engine is a proven marine propulsion engine designed for commercial vessels, fishing boats, patrol craft, workboats, and recreational cruising applications. Built on Cummins' highly respected 6.7-liter inline 6-cylinder platform, this engine delivers dependable power, outstanding fuel efficiency, and long-term durability. Featuring Bosch High-Pressure Common Rail fuel injection, turbocharging, and seawater aftercooling technology, the QSB6.7 provides smooth performance and reliable operation in demanding marine environments.

The Cummins QSB6.7 355HP Marine Diesel Engine is a compact 355HP marine diesel engine designed for inboard marine propulsion, repower projects, commercial boats, fishing vessels, cruisers, and workboats. It uses a 6.7-litre inline 6-cylinder 4-stroke diesel platform with turbocharged performance, seawater aftercooling, Bosch High-Pressure Common Rail fuel delivery, and EPA Tier 3 marine certification. Built for buyers who need strong torque, efficient diesel power, and trusted Cummins marine reliability, this engine is a practical choice for demanding marine applications.

The Cummins QSB6.7 480HP Marine Diesel Engine is a high-output marine inboard diesel engine designed for sportfishing boats, motor yachts, commercial craft, patrol vessels, workboats, fishing vessels, and compatible repower projects. Built on the proven Cummins QSB6.7 marine diesel platform, this engine delivers 480 HP from the larger QSB 6.7L class, giving buyers a strong balance of compact installation size, dependable torque, modern diesel performance, and trusted Cummins Marine reliability. For customers searching for a Cummins QSB6.7 480HP marine engine for sale, this model is a serious propulsion option for vessels that need more power than smaller QSB4.5 engines while staying within a practical inboard diesel package.