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S
ECTION
to avoid hydraulic fluid loss. Do not bend or twist
the hoses, as damage may result. Remove the
mounting bolts for the engine and lift the engine out,
leaving the mounts bolted to the stringer caps.
To reinstall, reverse the above procedure. Check
the coupling and shaft alignments, as well as water
hoses and wiring connections. Also check for fuel
and exhaust leaks and make sure seacocks are
open before starting engines.
10. V
& C
IBRATION
Some vibration is to be expected in your boat
because of the action of the engines and the propeller.
But excessive vibration indicates conditions which
must be promptly corrected to avoid damage.
Contact your Sea Ray
®
are experiencing severe vibration. The following are
some conditions which may cause vibrations.
A. F
O
I
OREIGN
BJECT
P
A
ROPELLER
CTION
Weeds, ropes, fishing lines or nets can become
wrapped around the propeller and/or shaft, causing
vibration and loss of speed. Always stop and then
reverse the propeller after going through a weedy
area to unwrap and clear away any weeds which
may have accumulated. Although reversing will
sometimes help to unwrap lines and nets, they are
difficult to remove without hauling the boat.
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.
®
52 Sundancer
(525 Sundancer
4 • B
ILGE
AUSES
dealer immediately if you
W
NTERFERING
ITH
/
S
OR
HAFT
®
)
& U
NDERWATER
C. E
S
NGINE AND
HAFT
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. 4.12) in this section
of this Owner's Manual.
D. C
O
OUPLING
UT 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
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
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.
11. 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.
G
EAR
O
A
UT OF
LIGNMENT
T
RUE
B
S
ITTING
OAT
TRUCTURE
C
AUSES
C
S
OOLING
YSTEM
4.7
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