Marathon — Starting-up the Generator
Operation · Generator set
From a Marathon service manual — check it applies to your exact model before use.
Procedure
- The generator output must be disconnected from the load and the main circuit breaker open.
- Start the prime mover and adjust it for the proper speed.
- Adjust the voltage to the required value by means of the voltage adjust rheostat.
- Close the main circuit breaker and apply the load.
- Adjust engine speed at full load to 1800 rpm for 60 hertz, 1500 rpm for 50 hertz.
- Before stopping the engine, remove the load and trip the main circuit breaker.
Specs & values
- 1800 rpm for 60 Hz
- 1500 rpm for 50 Hz
Source: Marathon service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.