Cummins — 8. Start the engine, using normal starting procedure.

For these Cummins models: G-1710, G-495, G-743, G-855, GTA-1710, GTA-743, GTA-855.

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Procedure

1. 9. After the engine coolant aitains operating temperature
2. 10. Shut down the engine.
3. 11. Close the main gas supply valve.
4. 12. Remove the two water manometers and the mercury

Source: manual:CUMMINS G495 G743 G855 GTA743A GTA743B GTA855 G1710 GTA1710 Operation and Maintenance Manual (2).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.