Hanse 350, Owners & Safety Manual, Page: 34 / 53

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The heat exchanger serves to cool the engine oil, the cooling water of the primary circulation and
the hydraulic oil of the gears. The heat exchanger is provided with a zinc anode to avoid
electrolytic corrosion.
The seawater filter must be cleansed regularly.
Check the seawater filter regularly. Depending on the water
quality, cleansing may be necessary.
After starting the engine, check whether water is discharged from
the exhaust, also intermittently, in addition to the exhaust gas.
In addition, the cooling water supply must be checked and ensured.
Before starting the engine:
•
make sure that the cooling water inlet is open,
•
make sure that the engine room is ventilated,
•
take a look into the engine room to check for possible leaks,
•
keep the engine room hatch closed (danger by exposed parts).
When the engine is running:
•
visually check whether cooling water comes out of the exhaust.
A temperature sensor indicates optical and acoustical if the cooling temperature is rising about
the maximum permitted value. In this case stop the engine and check the cooling circulations!
If the engine does not start after the third attempt, please shut the
seawater valve for cooling the engine. Try to start the engine
again. If the engine starts, open the seawater valve again (within
half a minute).
1.7.5. Exhaust system
The exhaust is discharged at the stern, thus reducing the sound emission. The exhaust system
consists of high temperature resistance hoses and pipes with silencer/water lock. The exhaust
installation is included in the seawater cooling systems. Arranged in this manner, the exhaust
system meets the requirements of the directive 2003/44/EC annex I.C.
Beneath the elbow the water is led to the exhaust installation and discharged to the outside along
with the exhaust gases. It cools the exhaust and reduces the noise.
It is very important that the cooling system is running. As already mentioned in section ‘Cooling
system’, is to be checked, whether water is discharged from the exhaust pipe while the engine is
running. The exhaust gas should neither be sooty nor blue. If this is the case, either the engine’s
air filter must be cleaned – which you can do yourself – or a specialist workshop has to adjust the
engine.
For safety reasons, the hose connections on the suction side are equipped with double hose
clamps.
If the boat is not in use, close the seacocks and drain the water out of the exhaust duct.
Notes on winter storage
Freshwater and seawater circuits are to be emptied according to the detailed instructions in the
engine’s maintenance guide, and the conduits are to be ventilated.