Westerbeke 12C- TWO Operator's Manual page 52

JS AND BW TRANSMISSION
SAILING OPERATION
The JS transmission'should be left in
i~,
NEUTRAL position
while sailing, Leaving the transmission in NEUTRAL while
sailing alleviates unnecessary drag on the vessel because the
propeller is able to freewheel (spin). However, if the
transmission is left in its FORWARD gear while sailing, the
transmission will not be daruaged. (Leaving the transmission
in NEUTRAL is just good sailing practice).
COOLING
The JS transmission is raw water-cooled. Raw water enters
the transmission through a stainless steel inlet pipelpcated at
the base of the bell housing. This water helps to ccalthe
transmission's lubricating oiL
BELL HOU:SING,
WATER
ALLEN
DRAIN PLUG
JS TRANSMISSIONS SPECIFICATIONS
General
Gear Ratio (Standard)
Propeller ShaH
(Direction of Rotation)
Propeller
Lubricating 011
Transmission Sump
Capacity
OIL TEMPERATURE
Case-hardened helical gears with an
intermediate reverse gear. Reversing out
by servo double disc system
2,47: 1
Right handed - standard transmission,
See propeller recommendation chart
SAE 20WI20
or
SAE 30 exclusively (Do
not mix grades of oil
or
use multi
grades). API, CF, CG-4,
or
SJ,
1 qts (1 liters)
250 F (120 C) Maximum
SERVICE
If any seal on the transmission shows signs of leaking, have
the transmission looked at by a qualified WES'IERBEKE
dealer, llis problem, especially concerning the rear seal, is
often con1nbuted to an improper alignment of the
transmission's coupling and the propeller shaft's coupling.
Disassembly of the transmission in the field is not recom-
mended, If an overhaul or repair is needed, the work should
be done by an authorized WESTERBEKE service centel.
MAINTENANCE
Transmission maintenance is minimal, Keep the exterior
housing clean, check the fluid level as part of your regular
routine, and change the fluid every 300 operating hours,
Periodically inspect the transmission and the cooler for leaks
and corrosion, Make certain the air vent is clear and when
checking the fluid level look for signs of water contamination
'(fluid will appear as strawberry cream).
Lay-up/Winterize
Storage requires special care. Follow these procedures:
NOTE:>This operation will usually occur when the engine raw
waterwater cooling system is properly winterized.
D
Clean up the transmission and touch-up any unpainted
areas (use heat resistant paint).
D
Fill the transmission with SAE 30 engine oil to prevent
internal corrosion. (Extended storage only, 12 months
or more).
D
Loosen attaching hardware from the transmission output
flange and propeller shaft coupling flange before
removing the boat from the water. Seperate the flanges
and spray with lubricant.
D
Inspect the gear shift cable, linkage, and attachments.
Look for cmrosion of the end flttings, cracks or cuts in
the conduit, and bending of the actuator rods. Lubricate
all moving parts.
NOTE:
If
the transmission is to be stored for a long time
(twelve months or more), it should be topped offwith oil to
prevent internal corrosion. Reduce the oil level before putting
the engine back into se11'ice.
"MI'"
WESTERBEKE,
Engines & Generators
45