Engine And Fuel System Preparation; Preparing Power Package For Storage-Carburetor Models - Mercury 3.0 MPI ECT Operation & Maintenance Manual

Section 5 - Storage
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.
Preparing Power Package for Storage—Carburetor Models

Engine and Fuel System Preparation

Fuel is flammable and explosive. Ensure that the key switch is off and the lanyard is positioned so that the engine cannot
start. Do not smoke or allow sources of spark or open flame in the area while servicing. Keep the work area well ventilated
and avoid prolonged exposure to vapors. Always check for leaks before attempting to start the engine, and wipe up any
spilled fuel immediately.
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.
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. Remove the hardware securing the flame arrestor assembly. Do not remove the flame arrestor until after the engine is
running. This will prevent the exposure of backfire flames.
4. Flush the cooling system. Refer to the Maintenance section.
5.
Supply cooling water to the engine. Refer to the Maintenance section.
6. Start the engine.
7. Run the engine at 1300 RPM for five minutes. This is usually enough time for the engine to reach a normal operating
temperature and for the treated gasoline to circulate through the fuel system.
8. Close the fuel shut off valve, if equipped, or disconnect and plug the boat fuel tank hose.
9. While running the engine at 1300 RPM, fog the induction system and combustion chambers by spraying approximately
227 g (8 oz) of Mercury/Quicksilver Storage Seal Rust Inhibitor into carburetor bores.
10. Spray the remaining 57 g (2 oz) of Storage Seal Rust Inhibitor rapidly into the carburetor as the engine begins to stall from
lack of fuel. Allow the engine to stop. Turn the ignition off.
Tube Ref No.
Storage Seal Rust Inhibitor
119
11. Install the flame arrestor assembly.
12. Change the oil and oil filter.
13. Replace the water separating fuel filter element where applicable.
14. Connect the fuel hose if disconnected and open the fuel shut off valve, if equipped.
15. Drain the engine seawater cooling system. Refer to Draining the Seawater System.
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Description
NOTICE
WARNING
WARNING
Where Used
Carburetor 92-858081K03
90-8M0113856 DECEMBER 2015
eng
Part No.