TP-6773 5/12a18 Section 4 Exhaust System
4.3 Exhaust System Location,
Mounting, and Installation
Note: Should any information regarding installation
conflict with USCG Regulations, follow USCG
Regulations.
Mount the silencer independently to eliminate stress on
the exhaust system and the exhaust manifold/mixer
elbow. See Section 7 for the mixer elbow water line hose
size. See Figure 4-1 for the exhaust connection to the
mixer elbow. Provide an adequate hose length from the
exhaust mixer to the silencer to allow for generator set
movement.
1
1. Water/exhaust outlet
Figure 4-1 Mixer Elbow/Exhaust Connection,
Typical
Locate the exhaust outlet at least 10 cm (4 in.) above the
waterline when the craft is loaded to maximum capacity.
Install an exhaust port with the flap at the exhaust
(transom) outlet to prevent water backup in following
seas or when moving astern (backward). A lift in the
exhaust piping before the piping exits the craft prevents
backwash. See Figure 4-3, item 1. Support the exhaust
lines to prevent the formation of water pockets.
Exhaust system installation guidelines for various
generator set locations follow. Information and
illustrations of stern- (rear) exhaust installations also
apply to side-exhaust installations. Where exhaust lines
require passage through bulkheads, use port (left)- or
starboard (right)- side exhaust outlets, also in
applications in which long exhaust lines to the transom
(rear) could cause excessive back pressure. See
Figure 4-2 for allowable back pressures.
Model
Allowable
Exhaust Back
Pressure,
≤
kPa
(mm H
2
O)
6EKOD/5EFKOD and
9EKOZD/7EFKOZD
14.2 (1444)
11EKOZD/9EFKOZD (1 Phase) and
11EKOZD/9EFKOZD (3 Phase)
14.8 (1506)
Figure 4-2 Allowable Exhaust Back Pressures
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