Raw water system -
Cleaning and inhibiting
The raw water system must be
flushed with fresh water to prevent
the buildup of deposits and salt
crystals in the circuit. It must also
be protected against corrosion and
frost when performing long-term
storage.
1.
Stop the engine and close the
sea cock.
2.
Disconnect the hose on the
outlet side of the raw water filter.
3.
Place the free hose in a con-
tainer filled with fresh water. En-
sure the tank is large enough as
the raw water pump must never
be run without water.
4.
Check that no one is in the
vicinity of the engine, the propel-
ler and the exhaust outlet. Put
the lever in neutral and start the
engine.
5.
Let the engine run few minutes
at idle. Add fresh water in the
container if necessary.
6.
Stop the engine.
7.
Fill the container with engine
coolant mix (50% clean water,
50% anti-freeze).
8.
Start the engine and let it run at
idle. Add enough coolant to fill the
raw water system with coolant.
9.
Stop the engine before the
container is empty.
10.
Reconnect the hose.
11.
Drain the coolant before the
next time the engine is used.
I
WARNING
Check for leaks before the next
engine start.
I
CAUTION
When preparing the engine for
long term storage, if the engine
is likely to be subject to frost,
drain all water in the raw water
circuit.
48
Summary of Contents for N4.115
Page 1: ...Nanni marine engine Operator s manual Engines N4 115 N4 140...
Page 19: ...N4 115 N4 140 16 1 2 3 13 15 7 9 4 6 19 14 16 5 8 10 11 17 18...
Page 25: ...Note 22...
Page 64: ...61 Note...
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