STARTING MOTOR GP-ELECTRIC 4227553 - Caterpillar

Operating engines above the rating definitions can result in shorter service life before overhaul.
Typical operating parameters for each rating level are summarized in Table 1. Table 1 assumes the use of a fixed pitch propeller. If a variable pitch propeller is used, consult your Caterpillar dealer for marine engine performance and for information on reduced engine rpm. Optimum fuel consumption can be achieved by operating the engine at the Suggested Reduced rpm.
Table 1
3208 Marine Engine Ratings    
Full Throttle        
Rating Level     Time     Rated rpm     Suggested Reduced rpm
"Cruising Speed"    
A     Up to 100 percent     -     -    
B     Up to 80 percent     2400     2300    
C     Up to 50 percent     2600     2300    
C     Up to 50 percent     2800     2500    
D     Up to 16 percent     2800     2400    
E     Up to 8 percent     2800     2400    For most applications, the customer can provide profile information from similar vessels or from the actual vessel. If the information that is provided by the customer is not sufficient, instruments are available to more precisely define the operating profile. A 7D-1513 Tachograph Assembly can establish an operating profile by recording engine rpm versus time on a paper graph.