Marine M3 For propulsion applications that may utilize full power no more than 4 out of each 12 hours of operation. These applications typically operate at full power up to 35 percent of the time and accumulate as many as 2,000 hours/year.

PERFORMANCE CURVE DEFINITIONS

Marine M1 Marine M2 For propulsion applications that may operate up to 24 hours a day at uninterrupted full power. These applications typically operate over 3,000 hours/year. M1 rating is ISO8665 "standard power" rating and the SAE J1228 "crankshaft power" rating. For propulsion applications that may utilize full power up to 16 out of each 24 hours of operation. These applications typically operate at full power up to 65 percent of the time and accumulate as many as 3,000 hours/year.