Cooling System - Volvo Penta AD31 Owner's Manual

COOLING SYSTEM

INHIBITING SEA WATER COOLED ENGINES
Regular maintenance and servicing of the cooling
system is an effective way of preventing damage
from overheating. It is also important to inhibit the
cooling system for the lay-up season in order to
avoid frost damage and corrosion.
Work on the cooling system is best carried out
on land. Otherwise there is a risk of water getting
into the boat.
from the inside of the shield on the Aquamatic drive
or from the reverse gear. Connect a hose to the
suction pipe and insert it in a bucket of fresh water.
Make sure that the bucket is continually replenished
with fresh water. Let the engine idle until it warms
up enough to open the thermostat.
Never let the water pump run dry.
6
The engine and reverse gear cooling
water ducts must be flushed and
drained off. Detach the suction pipe