INSTALLATION
10
September 2006 / WHISPER 9.5/12.5/15/20 ULTRA / US
Model
Minimum inner diameter
Whisper 9.5 Ultra
Whisper 12.5 Ultra
Whisper 15 Ultra
3/4" (19 mm)
Whisper 20 Ultra
1" (25.4 mm)
The suction hose should be kept as short as possible.
Raw water plumbing should avoid bends as much as
possible.
Restriction of raw water flow, caused by kinked hoses,
undersized pipes or connections, will reduce the engine
cooling capability. This is the main cause for overheating
of an engine.
After running the generating set for the first time, check the
coolant flow rate using a stopwatch and by holding a pail
of a known volume under the wet-exhaust outlet. The flow
rate should be according to the data in the users manual
3
INSTALLATION OF THROUGH HULL FITTING
It is good practice for yachts to use a hull inlet fitting with
an integrated strainer (water scoop). For propulsion
engines in motorboats the water scoop is often mounted
against the sailing direction to induce more water intake
for cooling.
This should not be done in the case of a
generating set! When sailing at higher
speeds, water will be forced into the inlet and
your generating set will overflow!
Fig. 9 Installing water intake
On motorboats and on sailing boats the water scoop for a
generating set should be fitted with the opening faced
backwards to prevent water being forced in during sailing.
1
2
3
4
5
6
7
24"
60cm
60cm
24"
60"
150cm
Max.
Min.
Min.
5cm
2"
Fig. 8. Internal cooling system
1 Water level;
2 Water/exhaust separator;
3 Seacock;
4 Waterlock;
5 Air vent;
6 Water strainer;
7 Seacock.
SAILING DIRECTION
SAILING DIRECTION
FLOW DIRECTION
FLOW DIRECTION