52 Sedan Bridge
(525 Sedan Bridge)
4.5
S
ECTION
4 • B
ILGE
& U
NDERWATER
G
EAR
7. M
ARINE
G
EARS
A. R
EDUCTION
G
EARS
A reduction gear reduces the rotating speed of the
propeller shaft in relation to the engine RPM. This permits
the use of a larger propeller while allowing the engine to
attain its rated RPM, thereby increasing efficiency.
B. R
EVERSE
G
EARS
The reverse gear incorporates the clutch and
controls the rotation of the propeller. The position
of the clutch control or shifting lever indicates the
motion which the clutch and reverse gear are
transmitting. The center position of the lever
indicates neutral. Engine RPM should never
exceed 1000 when engaging or disengaging the
clutch. Higher RPM will result in unnecessary
wear and shortened life of the unit, and perhaps
breakage.
Marine reverse gears are hydraulically operated,
thereby making it imperative to periodically maintain
and check oil level. If the correct oil level is not
maintained, slippage occurs, causing damage to
the clutch plates. Too much oil will cause foaming
and erratic clutch operation. For additional
information see the Engine Operator’s Manual.
8. E
NGINE
E
XHAUST
S
YSTEM
The exhaust system on Sea Ray
®
boats with
inboard engines is designed so that water from the
raw water cooling system enters the exhaust
system through elbows (engine side) where water
and exhaust are mixed. Water and exhaust are then
pumped through the mufflers and then overboard
through the exhaust outlet. Make sure water is
flowing from the exhaust outlets while the engines
are operating. Prior to every boat use, examine the
exhaust system fittings to ensure tightness.
A drain plug is located on each bypass muffler.
When servicing or winterizing, remove the plug to
drain the water out of each muffler. Replace the plug
after all water has drained from the muffler.
E
NGINE
E
XHAUST
(F
IG
.4.5.1)
PORT ENGINE EXHAUST
GENERATOR EXHAUST
MUFFLER
EXHAUST TUBE
EXHAUST ELBOW
D
C
B
A
E
FWD
PORT ENGINE EXHAUST SHOWN, STARBOARD SIDE TYPICAL
D
C
B
A
E
9. E
NGINE
R
EMOVAL
Should the removal of an engine become
necessary, see your Sea Ray
®
dealer or an
authorized service representative of the engine
manufacturer. The following is only a generalized
procedure to follow.
