Cleaning The Raw Water Filter; Raw Water System - Draining - Nanni N4.65 Operator's Manual

S08 MAINTENANCE

CLEANING THE RAW WATER FILTER

The model of prefilter can vary according the boat as the
raw water filter is an optional extra not in the scope of
supply of the engine. These instructions are given as an
example only.
Check the raw water filter more regularly than indicated
in the service schedule if the boat is used in water with
lot of dirt and/or mud.
TO CLEAN THE FILTER :
1. Stop the engine, remove the key from the panel and
close the sea cock.
2. Check the condition of the raw water filter. If deposits
have formed, unscrew the cover and remove the seal
plate.
3. Remove all the contaminants. Rinse the filter and the
housing with fresh water and check the condition of
the seal.
4. Reinstall all the components and open the sea cock.
Start the engine and check for leaks.
5. Notice: When the boat is out of water, check that the
through-hull is not clogged by mud or algae.

RAW WATER SYSTEM - DRAINING

WARNING !
It is highly recommended to carry out these operations
when the boat is laid up on bare ground. If the boat
cannot be removed from the water, close the sea cock
and prevent water entry by any means.
1. Stop the engine, remove the key from the panel and
close the sea cock.
2. Remove the cover of the raw water pump.
3. Remove the cover and the seal from the raw water
filter.
4. If a siphon breaker is fitted, drain it in following the
manufacturer recommendations.
5. Drain the cooling system of the transmission
lubrication circuit (if fitted).
6. Drain the waterlock and any other equipment
connected to the raw water and exhaust system.
7. Reinstall correctly all components. Open the sea cock
and check for leaks. Prime the raw water system by
adding water through the raw water filter if necessary.
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