Exhaust system
72
Recommended hose diameters elbow - silencer (
∅∅
∅∅
∅
A
) and silencer outlet (
∅∅
∅∅
∅
B
),
Aqua-lift systems
Engine Exhaust hose Exhaust hose
inner diameter (
∅∅
∅∅
∅
A
) inner diameter (
∅∅
∅∅
∅
B
)
TAMD31/41/42 89 mm (3.5") 89 mm (3.5")
KAMD43/44 100 mm (4") 100 mm (4")
KAMD300 100 mm (4") 100 mm (4")
Exhaust system, Aqua-lift silencer. Wet exhaust line in motor boats
The figure shows an example of an engine with the
Aqua-lift silencer system.
Make sure the Aqua-lift silencer has a volume that
can accomodate the water quantity after the engine is
shut down. The water level shall be well below the si-
lencer inlet.
The inner diameters of the exhaust hoses (
∅∅
∅∅
∅
A
and
∅∅
∅∅
∅
B
) should be chosen to suit the engine power, to
give low exhaust backpressure.
See table on page 72 for dimensioning hoses for and
after the silencer.
The minimum height between the lower edge of the si-
lencer exhaust outlet and the water line is at least 350
mm (14") unless a swan neck is installed. See figure
above and on page 73.
Silencers
There are various types of silencers depending on the type of installation. Two very common types are:
• Aqua-lift silencers
• In-line silencers
Min.
350 mm
(14")
∅∅
∅∅
∅
A
∅∅
∅∅
∅
B
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