Beta Marine Beta 10 Operator's Maintenance Manual page 19

DRY EXHAUST INSTALLATION
a) An engine correctly installed in accordance with this
handbook will meet the emission requirements of the
RCD (see back of manual).
b) Keep exhaust systems to a minimum length and
have gradual bends, refer to 'exhaust back pressure'
bottom of page 16 for futher information .
c) The dry exhaust system installed in a canal boat
or work boat should be 1
diameter.
The engine is fitted with a 1
stub as standard - Valid for exhaust systems up to 3
metres in length. A flexible exhaust bellows and dry
exhaust silencer should be used. It is up to the
installer to work out his own pipe run but care
should be taken as follows:
23 Dry Exhaust System
24 Dry Exhaust System
1
/ " minimum internal
2
1
/ " BSP male connector
2
• Never use a flexible exhaust bellow as a bend, it will
crack, always keep them straight.
• Ensure that rain water (or any other water - say from
the side of the loch) cannot enter the exhaust port
and run back down the system, flooding the silencer
and eventually the engine (see drawings below).
• The system should be lagged if there is any danger of
the crew getting near it.
• A dry exhaust system will give off considerable heat
and suitable insulation and ventilation must be
provided.
Flexible
Exhaust Hose
Ensure exhaust raises then falls to outlet
17