ENGINE OPERATION46 GM Series Operation ManualCHECKING THE ENGINEAFTER OPERATION• Check that the key switch is in the OFFposition and master battery switch (ifequipped) is turned to OFF.• Fill the fuel tank. See Filling the FuelTank on page 28.• Close the seacock (if equipped).NOTICEBe sure to close the seacock. Neglectingto close the seacock could allow water toleak into the boat and may cause it tosink.• If there is a risk of freezing, drain theseawater system. See Drain SeawaterCooling System on page 72.• At temperatures below 0°C (32°F), drainseawater system and connect theengine heater (if equipped).
