When should the engine alarm sound on Volvo Penta 3.0?

The engine alarm on a Volvo Penta 3.0 should sound under several conditions, including low oil pressure, high engine temperature, or other critical issues detected by the engine management system. It serves as a warning to the operator to take immediate action to prevent engine damage. If the alarm sounds, it's essential to stop the engine and investigate the cause before resuming operation. Always refer to the owner's manual for specific indicators and troubleshooting steps.