Internal (Cooling System) Care - Indmar 5.7L Vortec Operator's Manual

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Operator's manual (80 pages)

Table Of Contents

Table of Contents

Enlarged version

The following engine must not be operated in brackish

or salt water environments unless it is equipped with a

closed cooling system which allows the use of anti-

freeze coolant in the engine instead of raw water.

• Malibu Hammerhead 383

This engine uses aluminum cylinder heads and will be

severely damaged from salt water corrosion if operated

in brackish or salt water. See your Indmar dealer to

install a closed cooling system if you have this engine

and will operate it in brackish or salt water.

The following engine is equipped with a standard closed

cooling system from Indmar:

• Malibu LS7

This engine can be operated in fresh water or salt water

without causing damage to the internal cooling passages

in the engine. The cooling passages in the exhaust man-

ifolds are not part of the closed cooling system and

although they are corrosion resistant, need to be

checked periodically for damage from salt water.

The remaining Indmar engines will tolerate occasional

use in salt water but it is recommended that if the engine

will be used in salt water more that 25% of the time that

the engine be equipped with a closed cooling system.

6-10

External Care

Your engine has been carefully primed and painted to

protect it against rust and corrosion. To keep your engine

looking like new, Indmar recommends applying an anti-

corrosion compound, such as Pennzoil Marine Z-M

Corrosion Protectant and Lubricant. Regular application

(every 3 months) of this Protectant, particularly on

exposed metal surfaces, motor mounts and electrical

connections, will displace water and seal the surfaces

against penetration by corrosive agents. Rinsing the

engine with fresh water between applications of the

Protectant will further protect the exposed surfaces.