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S
ECTION
Always check for loose or trailing dock lines before
getting underway. When towing a dinghy,
remember that a long line may easily become
entangled with the propeller when backing down.
B. B
P
ENT
ROPELLER AND
A badly damaged or distorted propeller or shaft is
an obvious cause of vibration. Even when the
propeller appears to be perfect, make sure it has
not been pulled off-center by the propeller key.
C. E
S
NGINE AND
HAFT OUT OF
Although the shaft is properly aligned when it leaves the
factory, after transit and after the boat has been in the
water a few days, the alignment should be rechecked.
The shaft coupling is the connecting point between the
shaft and the engine and the alignment should be set at
.005 or less. Refer to SHAFTS (pg. 4.10) in this section
of this Owner's Manual.
D. C
OUPLING OUT OF
Although an extremely unlikely condition, check the
couplings if other efforts to correct the vibration fail.
Check the engine half of the coupling (with dial
indicator on the face) to see that it runs true with
the shaft coupling. Also check the coupling keys.
They must fit correctly to prevent forcing the
couplings off center.
E. E
P
H
NGINE
ART
ITTING
Engines are flexibly mounted to reduce transmission of
vibration to the hull structure. If some part of the engine,
such as the oil pan, reverse gear or reduction gear
housing, contacts a stringer, brace or part of the hull,
vibration will result. The flexible shaft log allows a limited
side motion of the shaft, but an excessive "whip" can
cause the shaft to strike the sides of the shaft hole or
the shaft log with resultant vibration.
F. O
P
C
THER
OSSIBLE
Other causes of vibration include the following:
engine out of tune, a bent rudder, a worn strut
bearing, a component of the exhaust system
vibrating against the hull or improper contact
between shaft taper and the propeller hub bore.
4.6
4 • B
ILGE
/
S
OR
HAFT
A
LIGNMENT
T
RUE
B
S
OAT
TRUCTURE
AUSES
https://www.boat-manuals.com/
& U
NDERWATER
12. F
W
RESH
ATER
The fresh water cooling system is a closed system
which helps protect engines from internal corrosion
and provides more even distribution of engine
temperature. Change the coolant annually.
A. C
R
OOLANT
ECOMMENDATIONS
The standard mixture of water and coolant is a
mixture of 40% environmentally safe, non-toxic
antifreeze and 60% water, which protects to 0°F
(-27°C). This will allow the coolant to expand
properly and maintain normal operating engine
temperature. In colder climates, the coolant level
should be increased to 50/50, which protects to
-10°F (-37°C), for proper coverage. To find engine
coolant requirements for the specific engine on
your yacht, refer to your Engine Owner's
Manual in the Owner's Manual Packet.
13. O
C
IL
HANGE
The oil change system, located on the inboard port
stringer, center of the port engine, simplifies
changing the oil in the engines, transmissions and
generator. The pump is self-priming and pumps in
either direction. The oil change pump is protected
by the 24 volt OIL CHANGE PUMP breaker on the
DC breaker panel on the port component board in
the engine room.
A. O
I
PERATING
NSTRUCTIONS
(S
O
ERVICE
NE
1.
Run engines or generator for several minutes
to warm the oil and mix the sludge.
2.
Select the first unit to be serviced. Turn the valve
to the open position, in line with valve body.
Have only one (1) valve open at a time. Make sure
other valves are closed to prevent accidental
over filling.
58 Sedan Bridge (585 Sedan Bridge)
G
EAR
C
S
OOLING
YSTEM
:
S
YSTEM
:
(1) E
T
NGINE AT A
IME
!
CAUTION
.)
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