Mercury MERCRUISER, Service Manual, Page: 68 / 566

!
WARNING
Fuel vapors trapped in the engine compartment may be an irritant, cause difficulty breathing, or may ignite resulting in a fire
or explosion. Always ventilate the engine compartment before servicing the power package.
NOTICE
Running out of fuel can damage catalyst components. Do not allow the fuel tanks to become empty during operation.
1. Check the antifreeze concentration where applicable. Refer to the
Specifications
section.
2. Before adding Mercury Quickstor Fuel Stabilizer to the fuel in the tank, determine the type of fuel that is in the fuel tanks
and proceed with the following:
a. Vessels using fuel without alcohol—fill the vessel fuel tanks with fresh gasoline that does not contain alcohol and add
a sufficient amount of Mercury Quickstor Fuel Stabilizer to treat the gasoline. Follow the instructions on the container.
b. Vessels using fuel containing alcohol—drain the fuel tanks as low as possible and add a sufficient amount of Mercury
Quickstor Fuel Stabilizer to treat the remaining gasoline. Follow the instructions on the container.
3. Flush the cooling system. Refer to the
Maintenance
section.
4. Supply cooling water to the engine. Refer to the
Maintenance
section.
5. Close the fuel shut off valve, if equipped, or disconnect and plug the boat fuel tank hose.
6. Connect the remote fuel tank with the special fuel mix to the fuel inlet fitting.
7. Start the engine and run the engine at 1300 RPM for five minutes. This is usually enough time for the special fuel mix to
circulate through the fuel system. Check to ensure there are no oil leaks. Shut the engine off.
IMPORTANT: Do not allow the engine to run out of fuel.
8. Disconnect the special fuel mix hose from the inlet fitting. Connect the boat fuel tank hose to the inlet fitting. Open the fuel
shut off valve, if equipped.
9. Change the oil and oil filter.
10. Replace the water separating fuel filter element where applicable.
11. Drain the engine seawater cooling system. Refer to
Draining the Seawater System
.
NOTICE
Water trapped in the seawater section of the cooling system can cause corrosion or freeze damage. Drain the seawater
section of the cooling system immediately after operation or before any length of storage in freezing temperatures. If the boat
is in the water, keep the seacock closed until restarting the engine to prevent water from flowing back into the cooling system.
If the boat is not fitted with a seacock, leave the water inlet hose disconnected and plugged.
12. Fill the seawater cooling system with propylene glycol mixed to the manufacturer's recommendation to protect the engine
to the lowest temperature to which it will be exposed during freezing temperatures or extended storage. This will also
prevent the formation of exfoliating rust in the cooling system passages.
13. Store the battery according to the manufacturer's instructions.
Power Package Recommissioning
1. Ensure that all cooling system hoses are connected properly and hose clamps are tight.
!
CAUTION
Disconnecting or connecting the battery cables in the incorrect order can cause injury from electrical shock or can damage
the electrical system. Always disconnect the negative (‑) battery cable first and connect it last.
2. Install a fully charged battery. Clean the battery cable clamps and terminals and reconnect the cables. Tighten each cable
clamp securely.
3. Coat the terminal connections with a battery terminal sealant.
Tube Ref No. Description Where Used Part No.
Battery Terminal Sealant Battery terminal connections Obtain Locally
4. Perform the following prior to starting the engine:
a. Install the bilge drain plug.
b. Open the engine hatch.
c. Turn the battery switch on.
Maintenance
Page 1C-52 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015