Cooling - Fresh Water System, Heat Exchanger - Beta Marine Beta 43 Operator's Maintenance Manual

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% anti-freeze to
freshwater solution (see page 10). For the volume
required see technical specification page 4.
(b) With Beta 43 & Beta 50, check that the drain tap or
plug is turned off, see photo 23. The Beta 60 is not fitted
with a drain tap (if required drainage can be achieved by
removing the oil cooler water pipe next to the lift pump).
23
(c) Fill engine with freshwater / anti-freeze solution through
the top of the heat exchanger or header tank with the
filler cap removed. See photo 24.
24
water / antifreeze
goes in here
19
(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 1).
(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 1" below the filler neck.
Important: Removal of the pressure cap when the engine is
hot can cause severe injury from scalding hot water under
pressure. Always allow the engine to cool and then use a
large cloth when turning the cap anti-clockwise to the stop.
This allows the pressure to be released. Press firmly down on
the cap and continue to turn anticlockwise to release the cap.
(i) Repeat (h) if coolant level is more than 1 inch below the
base of the filler neck when the engine has cooled down.
2
(j) Run engine on / full load for 20 minutes, check for
3
leaks and repeat (i).
(k) Anti-freeze solutions should be drained off every
2 years and replaced with a new solution.
Note: When draining fresh water system, ensure the engine
has cooled sufficiently to prevent scalding from hot
pressurised water. Prior to draining a cold engine, remove the
filler cap from the header tank and then open the water drain
tap. This allows the water to drain freely from the system.