That’s right, the newly introduced QSB5. 9-380 is now available …… for your boat. The new 5. 7 produces it’s 380 hp at 3000 rpm’s and was developed in partnership with Mercury Marine, to be marketed under the name of Cummins Mercruiser. Isn’t it something what you can do to power if you have ambient water as your cooling media, rather than air? The ISC 8. 3 engine is sold in the marine market up to 480 hp, where 350hp was it’s street limit, and now that has been cut back to 330 hp.
Cooling, the engineering challenge of the next millennium. found this on another site