INSTALLATION
8 Copyright © 2009 Mastervolt / July 2009 / WHISPER 6/8/11 / US
cap without release valve should be applied. Refer to the
special manual for these applications.
2 RAW WATER SUPPLY
For raw water supply the following installation materials
are required: -a skin fitting - a sea cock - a water strainer -
hoses and clamps. In order to keep the suction resistance
in the line at a minimum, the sea water intake system (i.e.
sea cock, tru-hull fitting, inlet filter, etc.) must have the
following inner diameter at least
Model Minimum inner diameter
Whisper 6 – 3600 rpm 3/4" (19 mm)
Whisper 8 – 3600 rpm 3/4" (19 mm)
Whisper 11 – 3600 rpm 3/4" (19 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. 7 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.
Use a sealant when mounting the skin fitting.
4 WATER STRAINER
Use an appropriate water strainer with connections of the
following dimensions:
Model Inner dimensions
Whisper 6 – 3600 rpm 3/4" (19 mm)
Whisper 8 – 3600 rpm 3/4" (19 mm)
Whisper 11 – 3600 rpm 3/4" (19 mm)
Install the water strainer in a well accessible position,
(refer to fig. 6-6) 5 cm above the waterline.
SAILING DIRECTION
SAILING DIRECTION
FLOW DIRECTION
FLOW DIRECTION
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