030412.05
5
Exhaust systems 30-90 mm
ENGLISH
The maximum thickness of the transom at the place where the tran-
som connection is fitted, can be 35 mm (1 3/8”) for type TRCxxPV and
TRCxxS.
2.3
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 down-
ward over its whole length from the water injection point to the ex-
haust silencer.
During operation, the exhaust pipe will contain water. This will in-
crease its weight considerably, so support the exhaust pipe properly.
The exhaust pipe from silencer to transom connection must be in-
stalled in such a way that:
- The highest point in the exhaust pipe should not be more than 150
cm (60”) above the underside of the exhaust silencer.
- The length of the section between the waterlock and the highest
point, should not exceed 300 cm (120”).
2.4
Hose connections
In order to achieve the ideal connection between the hoses and the
exhaust silencer, both hose connections on type LSG and LSS turn
through 360 degrees, while on types WLOCKL40/45/50R, the INPUT
hose connection turns through 360 degrees.
LSS and WLOCKL40/45/50R:
Loosen the hose clamps before turning the hose connections!
Tighten up the hose connections to a torque of
5 - 6 Nm
.
LSG:
Loosen the bolts before turning the hose connections!
Tighten up the hose connections to a torque of
0,4 Nm
.
- To ease the fitting of the hose to the hose connector, use only wa-
ter and/or soap, NOT grease or products containing oil.
- Fit each hose connection with 2 stainless steel 12 mm (1/2”) wide
hose clamps.
2.5
Sensor for temperature alarm
A sensor for a temperature alarm can be fitted in the exhaust pipe.
2.6
Waterlock type LSG
A sensor for a temperature alarm can also be fitted in the waterlock
connector. The ‘IN’ connector on the waterlock has two circular areas.
These are intended for fitting the temperature sensor. Drill in one of
these areas a hole of the correct size. Fit the sensor with a lock nut
and, after fitting, check that the waterlock is completely liquid and
gas-tight.
3
Installation Examples
Exhaust systems with an waterlock type LP/LSG/LSL/LSS, and silenc-
er type MP, goose neck type LT and a transom connection are shown
on page
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 ex-
haust silencer) will run back to the exhaust silencer.
To reduce the amount of this water as much as possible, the goose
neck should be fitted directly above the exhaust silencer, if possible
(see drawings 1 and 3).
When the goose neck is fitted directly to the transom (drawings 2
and 4), the maximum length of the exhaust pipe, between waterlock
and the highest point, should be taken into account.
3.1
Prevention of syphoning (drawings 3 & 4)
If the water injection point ‘C’ is below, or less than 15 cm (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:
1 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.
2 By fitting an air vent (with valve) in the coolant water hose
between the engine block and water injection point ‘C’.
4
Maintenance
- Check all hose connections for gas and water leaks regularly.
- Before the winter lay-up, drain the exhaust silencer. The waterlock
has a drain plug for this purpose.
Waterlock LSG
Check the non-return valve for proper function at least once a year.
5 - 6 Nm
(0.5 - 0.6 kgm,
3.68 - 4.42 ft.lbf)
0.4 Nm
(0.04 kgm,
0.30 ft.lbf)
