Volvo Penta 21182210, Operator'S Manual

Page: 68 / 192

Starting
Static Water Line
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51634
Static water line is a measurement of the water level
in the boat engine's exhaust system. The exhaust pas-
sages of a sterndrive propulsion system are open to
the water surrounding the boat
A . When the engine is
not running, the water level in the exhaust system will
settle at the same level as the surrounding water
B . If
this water level is too high, water will enter the engine
through the exhaust manifolds; this is called water
ingestion.
The static water line should be correct when you pur-
chase a new boat. Your boat was designed and con-
structed so that, under normal load and use conditions,
the water level would not be high enough for water to
enter the engine. This is accomplished with exhaust
riser height and the height of the engine in the hull. If
you add weight to your boat, the boat and engine
exhaust will sit lower in the water. This raises the water
level in the exhaust. If you add too much weight, the
water level will be high enough to allow water inges-
tion.
NOTICE! Water ingestion damage from over-loading
is not covered by warranty.
Consider the static water line of your boat before add-
ing equipment such as generators, appliances, coolers
and other heavy items. Do not store un-needed gear
on your boat. Overloading with passengers also
causes problems with the static water line. Load dis-
tribution, especially when concentrated in the stern of
the boat, can raise the static water line.
NOTICE! Never exceed the weight limit posted by the
boat manufacturer. Never overload the stern of the
boat as this may cause the engine to be lowered below
the minimum safe static water line height.
If you have added weight to your boat and suspect
there may be problems with the static water line, per-
form the following test before operating the boat.
66 47700387 06-2009