Extended Storage Instructions - Mercury TDI 4.2L Manual

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.
IMPORTANT: Mercury Diesel recommends that propylene glycol antifreeze be used in the seawater section of the cooling
system for cold weather (freezing temperature), seasonal storage, or extended storage. Make sure that the propylene
glycol antifreeze contains a rust inhibitor and is recommended for use in marine engines. Be certain to follow the propylene
glycol manufacturer's recommendations.
3. Fill a container with approximately 5.6 Liter (6.0 US qt) of propylene glycol antifreeze and tap water mixed to
manufacturer's recommendation to provide –73.3 °C (–100 °F) protection to the engine.
4. Disconnect the seawater inlet hose from the seawater pump. Using an adapter, if required, temporarily connect an
appropriate length piece of hose to the seawater pump and place the other end of the hose into the container of propylene
glycol antifreeze and tap water.
NOTE: Discharge of propylene glycol antifreeze into the environment may be restricted by law. Dispose of propylene glycol
antifreeze in accordance with federal, state, and local laws and guidelines.
5. Start the engine and operate at idle speed until the antifreeze mixture has been pumped into the engine seawater cooling
system.
6. Stop the engine.
7. Remove the temporary hose from the seawater pump.
8. Clean the outside of the engine and repaint any areas required with primer and spray paint. After the paint has dried, coat
the engine with the specified corrosion inhibiting oil or equivalent.
Description
Corrosion Guard
Light gray primer paint
Phantom black paint
Diesel white paint
9. Your Mercury Diesel–authorized repair facility should now perform all checks, inspections, lubrications, and fluid changes
outlined in Maintenance Schedules.
The universal joint bellows may develop a set when stored in a raised or up position, causing the bellows to fail when
returned to service and allowing water to enter the boat. Store the sterndrive in the full down position.
10. Place the sterndrive in the full down (in) position.
11. Follow the battery manufacturer's instructions for storage and store the battery.

Extended Storage Instructions

IMPORTANT: Mercury Diesel strongly recommends that this service be performed by an Mercury Diesel–authorized repair
facility.
1.
Read all precautions and perform all procedures found in Preparing Your Power Package for Seasonal or Extended
Storage.
2. Read all precautions and perform all procedures found in Flushing and Draining the Seawater System.
90-8M0114081 DECEMBER 2015
eng
NOTICE
a
b
Where Used
Outside of engine, transom assembly, and
sterndrive
Outside of engine, transom assembly, and
sterndrive
Transom assembly and sterndrive
Outside of engine
NOTICE
Section 5 - Storage
a - Seawater pump
b - Container of propylene glycol
antifreeze and tap water
50893
Part Number
92‑802878‑55
92‑802878‑52
92‑802878‑1
92‑8M0071082
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