Malibu Boats 21 VLX, Owner'S Manual

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2020 Malibu Boats LLC • Owner’s Manual • Page 240
Flush Kit
In boats equipped with the optional flush kit
(which is highly recommended in boats operated in
salt/brackish water), the flush kit is used to clean out
the raw-water pick-up and operational areas of the
engine. The kit attachment is located on the port side
of the transom.
The flush kit switch
should ALWAYS be
in the OFF position
when there is no water in the tank. Allowing the pump to run without water
can result in damage to the system, which is not covered under warranty.
Before beginning this procedure, be sure the raw water pick-up under the boat is CLOSED. If it is not and the
boat is in water, raw water will become mixed with the clean water and will diminish the cleaning process. If the
boat is out of water, air may become mixed with the clean water and the engine can overheat, causing damage
not covered under warranty.
Open the fixture by twisting the cap counterclockwise. The cap is attached to the fixture by a chain. Attach a
garden hose with a fresh-water source (without water running) to the fixture. When it is secured, fully turn on the
hose (less water flow will be inadequate to flush the system, and could result in damage to the system that is not
covered under warranty).
Turn the engine ON to move water through the system. At no time should you ever exceed 1,100 rpm. The
water flow is insufficient to cool the engine via the flush if the rpm exceeds 1,100.
Run clean water through the system for approximately 8-10 minutes.
After running clean water through the system as prescribed, turn the engine OFF. Turn off the water source
for the hose. Disconnect the hose and reinstall the cap securely on the flush kit connector at the transom. If the
cap is not secure, air will be introduced into the system that will adversely affect the boat’s cooling system.
Before boating again, be sure the raw water pick-up is opened.
Corrosion in Fresh Water
The immediate previous information covers care and maintenance in salt or brackish water conditions.
However, it has been demonstrated that corrosion can occur in any water. As noted at the beginning of the
Care and Maintenance section, keeping your boat and trailer clean—and dry, when not boating—is critical to a
satisfactory experience. Corrosion can occur in any humid atmosphere. Even when boating in clean water, part
of the care and maintenance should include regularly reviewing all metal areas on the boat and trailer for signs
of corrosion. Any sign of corrosion requires IMMEDIATE attention. Corroded components must be treated and/or
replaced to avoid further corrosion. Note that corrosion is not covered under warranty!
Corrosion can occur to any metal component of the boat and/or trailer if
care is not taken to keep such components clean and dry when not boating.
Such corrosion is not covered under warranty. Deterioration of components
due to corrosion can result in component failure, which can lead to serious
injury or death.