Beta Marine BV1305 Operation And Maintenance Manual page 12

COOLING
BD1005, BV1305 and BV1505
engines are normally fresh water
cooled. This water circulates through
the engine and on to a heat
exchanger where it is cooled by sea
water which is pumped through the
cooling tubes. The sea water is then
injected into the exhaust system (see
diagram).
FILLING THE FRESHWATER SYSTEM
New engines are supplied with the
freshwater drained off. The following
instructions must be followed to fill
the system.
(a) Mix up in a clean bucket a 33 to
50% antifreeze to fresh water
solution. For the volume required
see technical specification
page 4.
(b) Check that the drain tap or plug
is turned off. (see fig 2l)
(c) Fill engine with freshwater/anti
freeze solution through the top of
the heat exchanger or header
tank with the filler cap removed.
(see fig 2m).
Drain
Tap or
plug
(d) Fill header tank to the top of the
filler neck and replace cap. Press
down firmly on filler cap and
hand tighten in a clockwise
direction.
(e) Run the engine for 5 minutes on
no load (out of gear) and check
coolant level. Top up as
necessary.
(f) Check system for leaks.
(g) If a calorifier is fitted care must
be taken to see that this is also
full of coolant and all the air is
expelled. (See calorifier fitting
notes under Section 3).
Fig. 2l
(h) Run the engine on one third load
for 15 minutes, preferably with
the boat tied up. As the system
warms up coolant may be
expelled from the overflow pipe
into the bilge. Stop the engine
and allow the engine to cool
down before removing the
pressure cap and top up the
coolant to one inch below the
filler neck.
Fig. 2m