Coastal Wave Marine lists Cummins QSB4.5 inboard diesel engines for marine applications, with current product listings at 150, 180, 200, and 230 hp. These engines may be considered for a new installation or repower, but the right choice depends on the vessel, required engine speed, operating profile, and complete engine configuration. Explore our range of Cummins marine engines.
Before choosing a QSB4.5, confirm the full engine model, rated horsepower, RPM, duty rating, and marine configuration. The name “QSB4.5” alone does not establish that a particular engine is suitable for your boat or operating conditions. Cummins also lists the B4.5L for marine applications, so verify the exact model and documentation for the engine being quoted.
For a repower, compare the existing engine’s model and serial number, rated RPM, mounting dimensions, cooling and exhaust arrangements, controls, and electrical connections. Check the gearbox model and ratio as well; engine power and transmission compatibility need to be considered together. You can also compare Cummins QSB6.7 marine engines if your vessel requires a different power option.
When requesting a quote, include your boat make and model, intended application, required horsepower and rated RPM, current engine model and serial number if replacing an engine, gearbox make and ratio, and delivery location. Photos of the engine data plate and installation can help with initial identification. Contact Coastal Wave Marine about a Cummins QSB4.5 engine to confirm the exact engine configuration, availability, warranty eligibility, and shipping terms.
