RDG603A13
– Issue 19
Page 42 of 97
21. Exhaust System (Work Boat / River Boat)
WARNING:
EXHAUST HAZARD!
NEVER OPERATE ENGINE WITHOUT PROPER VENTILATION.
NEVER BLOCK VENTS OR OTHER MEANS OF VENTILATION. ALL COMBUSTION
ENGINES CREATE CARBON MONOXIDE GAS DURING OPERATION.
ACCUMULATION OF THIS GAS COULD CAUSE ILLNESS OR EVEN DEATH.
Use 50mm ID suitable marine flexible exhaust hose on the 20 Work Boat model engine.
The exhaust system must not be restricted in any way.
Note: If the engine is installed low down in the boat, below the outside water level, a system
such as a Lift Silencer with a siphon break system, must be used to prevent sea water from
flowing back down the exhaust and into the engine.
Lift Silencer
The correct installation of the lift silencer is vital to safety, and to avoid back flooding of
the engine.
Figure 31
shows how to install the lift silencer correctly (Note: Halyard (M&I)
Limited have given Barrus permission to use the diagram).
Figure 31: Correct Installation of the Lift Silencer
1.
The swan neck must reach at least 450mm (18”) above the waterline, when
installed on hull centreline.
2.
The top of the silencer should be at least 300mm (12”) below the water injection
point.
3. The silencer must be installed as near as possible to the centreline of the hull,
