Beta Marine BetaGen 10, Installation Manual, Page: 42 / 116

40
a) An engine correctly installed in accordance with this
handbook will meet the emission requirements of the
RCD (Recreational Craft Directive).
b) Keep exhaust systems to a minimum length and have
gradual bends.
c) Keel cooled generating set engines depending on the
model will be fitted with either a 1
1
/
2
” or 2” male
dry exhaust stub and should always a have a flexible
exhaust bellow and dry exhaust silencer connected. It
is up to the installer to work out the most appropriate
pipe run but care should be taken as follows:
• Never use a flexible exhaust bellow as a bend, it will
crack, always keep them straight.
• Hydraulic lock, occurs when water is allowed to
enter the combustion chamber via the exhaust
and ‘hydraulics’ against the rising piston with the
consequences possible being, a bent con rod/s, an
emulsified engine oil and/or a damaged fuel pump.
It is imperative that it is avoided, always ensure that
canal, river or sea water cannot enter the exhaust port
and run back down the pipe, flooding the silencer and
then the engine. Please refer to image 24 & 25.
• 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, please refer to page 30.
KEEL COOLING - DRY EXHAUSTS
{
Flexible
Exhaust Bellow
Silencer
Silencer
24 Dry Exhaust System
Flexible
Exhaust Bellow
Silencer
Silencer
25 Dry Exhaust System
Ensure exhaust raises then falls to outlet