Westerbeke 12C-TWO Operators Manual And Installation Manual page 20

The sea water supply hose to the exhaust system's water injected elbow should be routed (looped) at least
12 inches above the vessel water line. An anti-siphon break should be installed, when needed, at the top
of this loop. The top of the loop should be placed high enough above the vessel's water line so as to
remain above the water line when the vessel is underway, no matter what the angle of heel or roll may be.
Syphon break
Waterlin~~
-~--~~
....
~";;,~­
Insulate.~
Installation with exhaust
manifold/water-injected elbow
at or below vessel water line.
Installation with exhaust
manifold/water-injected elbow
at a minimum of S" above
vessel water line.
I
48" max.
CAUTION: Vented loop must be .. :-.: ..
in a location where it will remain
above the water line during all
attitudes of the vessel's operation.
NOTE: The engine's heat exchanger
outlet will determine the
1Je"
or 1
n
dimension for the vented loop.
48
n
max.
I
Hydro-Hush
The sea water supply through-hull sea cock fittings must be of the flush-hull type. High-speed scoop type
of fittings should not be used as they can force sea water through. The exhaust discharge from the water
lift muffler should be routed well above the water line then downward to the through-hull discharge. This
routing will prevent sea water entry if the through-hull discharge fitting becomes submerged when the
vessel heels or rolls while under way, or is subjected to following sea conditions. Refer to the figures
shown above for recommended exhaust system installations. The exhaust through-hull discharge fitting
must not be restrictive so as to create unwanted back-pressure in the system.
20 Westerbeke Engines