MerCruiser 13, Руководство по обслуживанию

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6B - 8 - CLOSED COOLING MODELS 90-816462 2-695
Closed Cooling Section
Closed cooling section of closed cooling system
should be kept filled year-round with recommended
coolant solution. Do not drain closed cooling section
for storage, as this will promote rusting of internal sur-
faces. If engine will be exposed to freezing tempera-
tures, make sure that closed cooling section is filled
with an ethylene glycol antifreeze and water solution,
mixed to manufacturer’s recommended proportions,
to protect engine to lowest temperature to which it will
be exposed. If necessary, change coolant.
Coolant Recommendations
! CAUTION
Alcohol or Methanol base antifreeze or plain wa-
ter are not recommended for use in fresh water
section of closed cooling system at any time.
It is recommended that the coolant section of closed
cooling system be filled with 50/50 mixture of ethy-
lene glycol antifreeze and water. In areas where the
possibility of freezing DOES NOT exist, it is permissi-
ble to use solution of rust inhibitor and water (mixed
to manufacturer’s recommendations).
Change Intervals
Drain and flush coolant from the closed cooling sys-
tem at least every two years or whenever exhaust
gases have entered the system.
Draining Instructions
! WARNING
Allow engine to cool before removing pressure
cap. Sudden loss of pressure could cause hot
coolant to boil and discharge violently. After en-
gine has cooled, turn cap 1/4 turn to allow any
pressure to escape slowly, then push down and
turn cap all the way off.
IMPORTANT: A wire should be inserted into drain
holes to ensure that foreign material is not ob-
structing the drain holes. On later models with
two piece petcock, removal of petcock may be re-
quired so that wire can be inserted completely
into drain hole.
IMPORTANT: Engine must be as level as possible
to ensure complete draining of cooling system.
IMPORTANT: Closed cooling section must be
kept filled year round with recommended cool-
ant. If engine will be exposed to freezing tempera-
tures, make sure closed cooling section is filled
with an ethylene glycol antifreeze and water solu-
tion properly mixed to protect engine to lowest
temperature to which it will be exposed.
IMPORTANT: Do not use Propylene Glycol Anti-
freeze in the closed cooling section of the engine.
The following draining instructions apply to all en-
gines equipped with closed cooling. The location of
petcocks that require opening and hoses that require
removal are represented on the following pages for
the individual engines.
IMPORTANT: Observe precautions previously
outlined before proceeding.
1. Remove pressure cap from coolant tank.
2. Drain coolant from locations as shown for your
model and engine. (Refer to the appropriate dia-
gram on the following “Draining Diagrams” page.)
3. After coolant has drained completely, coat
threads of drain plugs with Quicksilver Perfect
Seal and install drain plugs and hoses. Tighten
clamps and drain plugs securely.
4. Remove coolant recovery bottle from mounting
bracket and pour out coolant.
5. Clean system as outlined in “Cleaning System.”
6. Fill system as outlined in “Filling Closed Cooling
Section.”