Beta Marine Beta 50 Operator's Maintenance Manual page 36

FILLING THE FRESH WATER SYSTEM
New engines are supplied with the fresh water 'coolant'
drained off. The following instructions must be followed to
correctly fill the system.
a) Pour into a clean bucket a mixture of both fresh water
and anti-freeze; with an anti-freeze ratio of 50%.
For the required volume please refer to 'Technical
Specifications' on page 6.
NB: Always use a Mono Ethylene Glycol Based Extended
Life Anti-freeze mixed 30 < 50% with water.
b) Check that the coolant drain tap or plug is turned off.
Please refer to image 31.
31
c) Fill engine with freshwater/anti-freeze solution
through the top of the heat exchanger or header tank
with the filler cap removed. Please refer to image 32.
32
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.
NB: For keel cooled engines a large quantity of coolant
(anti-freeze solution) is required depending upon the size
of the keel cooling system (refer to builder's instructions).
e) Run the engine for 5 minutes on no load (out of gear)
f) Check system for leaks.
NB: For keel cooled engines it is very important to
bleed all of the air out of the complete cooling system
before the engine is run on load (check with builder's
instructions).
g) If a calorifier is fitted care must be taken to see that
h) Run the engine on one third load for 15 minutes,
TO AVOID PERSONAL INJURY!
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
j) Run engine on
k) Anti-freeze solutions should be drained off every
Water/antifreeze
goes in here
NB: When draining the 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. Please refer to image 31.
34
and check coolant level, this will help remove air from
the system. Top up as necessary.
this is also full of coolant and all the air is expelled.
Please refer to 'Calorifier Connection' on page 17.
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 25 mm/1" below the filler neck.
CAUTION:
the base of the filler neck when the engine has cooled
down.
2 / full load for 20 minutes, check for
3
leaks and repeat (i).
2 years and replaced with a new solution.