TP-6277 10/03 Installation 49
6.6.4 Mid/Below Waterline Installation
Follow USCG regulations for installing an antisiphon
provision to prevent raw water entry into the engine.
Use the siphon break if the exhaust manifold outlet is
located less than 23 cm (9 in.) above the waterline when
the craft is loaded to maximum capacity. Install the
siphon break, see Figure 6-19, at least 31 cm (1 ft.)
above the waterline. To install, see the instructions
provided with the siphon break kit.
Note: Failure to properly install a siphon break will
cause engine damage and may void the
warranty.
Locate the siphon break above the highest point in the
exhaust line between the heat exchanger and the
exhaust mixer. See Figure 6-20 for siphon break
connection. Support the siphon break and hoses to
maintain their position and function. Mount the siphon
break directly vertical of its connection to the generator
set where possible. Otherwise, allow a slight offset to
clear stringers or other permanent structures. Protect
the siphon break air inlet from dirt and debris.
1
2
3
1-779
1. Mounting base
2. Retaining cap
3. Reed valve assembly
Figure 6-19 Siphon Break Components
ADV--5661
1
1. Cut hose and connect siphon break and hardware
Figure 6-20 Siphon Break Connection
Mount a typical silencer’s base no more than 1.2 m (4 ft.)
below the highest point in the exhaust line. Attach a
separate wood-mounting base to the hull stringers or
other suitable structures. Use the silencer
manufacturer’s recommendation for securing the
silencer to the hull. Mount the silencer with outlet not
more than 3 m (10 ft.) horizontally from the engine
exhaust manifold outlet. Use a USCG-type certified
marine exhaust hose.
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