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S
ECTION
6. E
R
NGINE
EMOVAL
Should the removal of an engine become necessary,
®
see your Sea Ray
dealer or an authorized
service representative of the engine
manufacturer.
7. 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
immediately if you 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.
4.8
4 • B
ILGE
AUSES
®
dealer
NTERFERING WITH
/
S
OR
HAFT
& U
NDERWATER
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 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
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.
G
EAR
A
LIGNMENT
T
RUE
H
B
S
ITTING
OAT
TRUCTURE
C
AUSES
®
(375 Sundancer
340 Sundancer
®
)
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