Exhaust Pipe; Installation Examples; English - Vetus NLPG40 Instructions D'installation

The top portion of the goose neck can be turned in a 360˚ radius.
The top portion should be turned as follows:
1 Unscrew the clamping strip
2 Turn the top portion to the desired posi-
tion
3 Tighten the clamping strip sufficiently, to a
torque of 0.3 Nm (0.22 ft-lb, 42 oz-in).
If possible, the goose neck should be fitted immediately above
the exhaust silencer, see drawings 1 and 3. This will reduce the
amount of water running back between the highest point and
the silencer.
When the goose neck is fitted directly on the transom con-
nection, then the exhaust pipe maximum length between the
silencer and the highest point must be taken into account, see
drawings 2 and 4.
Fit the goose neck
with the ty-raps®
supplied. The
goose neck has
slots in which the
ty-raps® should
be fitted.

Exhaust Pipe

In order to ensure the proper drainage of the coolant water
injected into the exhaust pipe, the pipe must be installed with a
slope downward over its whole length from the water injection
point to the exhaust silencer.
During operation, the exhaust pipe will contain water. This will
increase its weight considerably, so support the exhaust pipe
properly.
The exhaust pipe from silencer to transom connection must be
installed in such a way that:
Goose neck NLPG
- The highest point in the exhaust pipe should not be more
than 150 cm (5 ft) above the underside of the exhaust silenc-
er.
- The length of the section between the exhaust silencer and
the highest point, should not exceed 300 cm (10 ft).
Fitting the hose
To ease the fitting of the hose to the hose connector, use only
water and/or soap, NOT grease or products containing oil.
Fit each hose connection with 2 stainless steel 12 mm (
wide hose clamps.

Installation Examples

Exhaust systems with an exhaust silencer type NLPH, goose
neck type NLPG and a transom connection are shown on page
15.
Entry of water from the aft is almost completely prevented by
the extra height difference in the goose neck.
When the engine is stopped, any water which is still in the
exhaust pipe (between the highest point in the exhaust system
and the exhaust silencer) will run back to the exhaust silencer.
Prevention of syphoning (drawings 3 & 4)
If the water injection point 'C' is below, or less than 15 cm (0.6")
above the waterline (also when the ship heels under sail), there
is a risk that when the engine is stopped, the coolant water
will enter the engine due to syphoning. This syphoning can be
prevented in two ways:
 By creating an air vent system in the coolant water hose
between engine block and water injection point 'C', by fitting
an air vent with air vent pipe, for example.
The air vent pipe can be connected to its own hull outlet
(H) or to the connection on the gooseneck intended for this
(G).
Note: when delivered, the connection (G) on the goose-
neck is not open!
If the air vent pipe is to be connected to (G) this must first be
drilled through. Use a drill with diameter 4mm.
 By fitting an air vent (with valve) in the coolant water hose
between the engine block and water injection point 'C'.
Maintenance
Check all hose connections for gas and water leaks regularly.
Before the winter lay-up, drain the exhaust silencer. The exhaust
silencer has a drain plug for this purpose.

ENGLISH

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