Operator`s manual
Shifting 
To 
shift the transmission from 
NEUTRAL 
into 
FORWARD, 
exert a heavy 
push 
to the remote control 
lever. 
A 
gentle throw may not carry enough force to actually shift the transmission's internal 
gears. 
A gentle throw 
is 
signalled by the transmission not engaging into the desired 
drive. 
Make 
sure 
the remote control lever 
is 
lubri-
cated 
at 
lease 
once 
each 
operating 
season. 
Shift 
the transmission 
while 
the engine 
is 
running 
at 
1000 
rpm 
or 
below. 
CAUTION 
NEVER 
remove or loosen 
the 
two-bolt gear box lever cover from transmission. 
The 
position 
of this plate 
and 
the actuating lever inside of the transmission 
has 
been 
finely adjusted 
at 
the 
factory  to ensure 
equal 
throw distance 
of 
internal 
mechanisms. 
Loosening  of this cover's 
capscrews voids the transmission's warranty. 
Sailing Operation 
The 
JS 
transmission should 
be 
left 
in 
NEUTRAL 
while 
sailing. 
Leaving 
the transmission 
in 
NEUTRAL 
while 
sailing alleviates unnecessary drag 
on 
the 
vessel 
because 
the propeller 
is 
able to 
freewheel 
(spin). 
However, 
to lock the propeller shaft 
and 
to prevent it from rotating, place the transmission into 
FORWARD 
gear. 
Service 
If 
any 
seal 
on 
the transmission 
shows 
signs 
of leaking, 
have 
the transmission looked 
at 
by a 
qualnied 
Wester-
beke 
Dealer. 
This 
problem, especially concerning 
the 
rear 
seal, 
Is 
often attributed to 
an 
improper alignment 
of the transmission's coupling 
and 
the 
propeller shaft's coupling. 
Refer 
to the "Alignment of 
the 
Engine" 
sec-
tion of this 
manual, 
page 
24. 
Never loosen the gear box lever cover 
screws, 
except 
in 
the course of qualified servicing; this upsets critical 
adjustments. 
Disassembly 
olthe transmission 
in 
the field 
is 
not recommended.  If 
an 
overhaul 
or repair 
is 
needed, 
the work 
should 
be 
done by 
Westerbeke 
or 
an 
authorized 
Westerbeke 
service center. 
Cooling 
The 
JS 
transmission 
is 
sea 
water-cooled. 
Sea 
water enters the transmission through a stainless 
steel 
inlet 
pipe located 
at 
the 
base 
of the 
bell 
housing. 
This 
water 
helps 
to cool 
the 
transmission's lubricating 
oiL 
65  Westerbeke Diesel Engines 










