19
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 the correct strength of anti-freeze solution.
(b)
Check that the drain tap or plug is turned off.
(c)
Fill engine with freshwater/anti freeze solution through the top of the
header tank with the filler cap removed.
(d)
Fill the 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.
Note: for keeled cooled engines a much larger quantity of freshwater/anti freeze
solution is required depending on the size of the keel cooling tank – refer to the
builder.
(e)
run the engine for 5 minutes on no load (out of gear) and check coolant
level. Top up if necessary.
(f)
Check systems for leaks, including calorifier circuit if fitted.
Note: for keel cooled engines it is very important to bleed all the air out of the
system before the engine is run on load (check with builders instructions).
(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
installation section)
(h)
Run the engine on one third speed 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 25mm
below the filler neck.
