Supra SL Owner's Manual page 75

Section 12
Winterization & Dry Storage
Winterization
When the boating and ski season comes to a close, it is
important to have your boat professionally winterized.
If your boat is exposed to temperatures below 32 degrees
F (0 degrees C), it is possible for water in the engine, ballast
system, etc., to freeze. As this water freezes, it expands and
can crack pumps, valves, heat exchangers, engine blocks, etc.
This type of damage usually requires the replacement of the
cracked item and can be very expensive to repair.
It is extremely important to follow the proper winterizing
procedure. The engine must be correctly winterized for
safe storage in your climate. This should be done by a
professional. Your Supra dealer will know exactly what
must be done to ensure the longest possible life for your
boat.
In addition to having your boat professionally winterized, the
following tasks should be done to protect your boat during
storage:
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1. Remove the drain plugs from the boat.
2. Thoroughly clean the boat inside and out. Inspect the hull
for any residue or algae growth and remove if required.
3. Clean the bilge area thoroughly and operate the bilge pump
to remove any water from the bilge hose.
4. Remove all seat cushions and open all storage areas to air
circulation in the boat interior. When thoroughly dry, replace
cushions and close storage areas.
5. Top off fuel tank to prevent any condensation from
accumulating in the fuel system. Use a commercially
available fuel stabilizer to remove water and prevent
gumming.
6. If the boat is stored on its trailer, ensure that the boat is
properly positioned. If possible, lift the tongue so that the
bow is slightly raised to promote drainage from the drain
hole.
7. Install the canvas cover and secure the straps in accordance
with cover instructions.
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