Kohler 3.5CFZ, 4CZ, 5CFZ, 6.5CZ Above Waterline, Mid/Below Waterline, 18. Siphon Break Components

Above Waterline			1
In addition to considerations described earlier, a
customer-supplied silencer should be installed with its
outlet at a maximum of 10 horizontal ft. (3 m) from the
center of the engine’s exhaust outlet (see Figure 6-17).
A typical silencer should be mounted with the inlet and			2
outlet level and with the drain plug down. The silencer
may require two supporting brackets or hanger straps			3
for installation to stringers or other suitable structure.
Any “lift”in the exhaust line to improve silencing must be
below the engine exhaust manifold outlet.
Mid/Below Waterline
U.S.C.G. Regulations require that an anti-siphoning			1-779
provision be used to prevent raw water entry into the		1. Mounting Base	3. Reed Valve Assembly
engine if the exhaust manifold outlet is located less than
		2. Retaining Cap
9 in. (23 cm) above the waterline when the craft is loaded		Figure 6-18. Siphon Break Components
to maximum capacity. Install a siphon break, see
		The siphon break must be located at least 1 foot above
Figure 6-18, at least 1 ft. (31 cm) above waterline as
		the waterline at maximum vessel capacity between the
shown in Figure 6-19.
		heat exchanger and water elbow (three-way fittings).
		The siphon break and fitting must be supported to
		maintain proper position and function. The siphon break
		should be mounted directly vertical of its connection to
		generator set where possible. Otherwise, a slight offset
		is allowable to clear stringers or other permanent
		structures.
	1
	2	3
INPUT STOP/START			5
10A
FUSE	1/10
00000
TOTAL HOURS
BATT.			6
CHRG.
		4

	12			7
	11	10
	NOTE	9		8
		NOTE
Use two hose clamps on
		Data given is also applicable
each end of all flexible
		to side-exhaust installations.
exhaust hose connections.				258000-D
1.	Siphon Break		7.	Waterline
2.	Exhaust Manifold		8.	Silencer (Customer Supplied)
3.	Heat Exchanger		9.	10 ft. (3 m) Max.
4.	4 ft. (1.2 m) Max.		10.	Install Optional Water Lock Here
5.	Exhaust Hose Slope 0.5 in. (1.3 cm) per ft. (30.5 cm)		11.	Coolant Recovery Tank
6.	4 in. (10 cm) Min.		12.	1 ft. (30.5 cm) Min.

Figure 6-19. Typical Mid and Below Waterline Installation

TP-5695 12/93 Installation 6-11