Intermittent Duty (INT)This power rating is intended for intermittent use in variable load applications with a load factor of 20-40 percent. Full power is limited to two out of every eight hours of operation. Reduced power operations must be at or below 80 percent load. Also, reduced power operation must be at or below cruise speed (rpm). Cruise speed (rpm) is dependent on the engine rated speed (rpm):

Typical vessel applications include: planing hulls such as customs, military and police vessels, charter fishing, and some non-net dragging fishing vessel applications.

Typical auxiliary applications include: hydraulic powerpacks, thrusters for maneuvering, and emergency fire pumps.