Operator`s manual
Engine 
Oil 
Change 
(to 
include 
IiIter) 
1. 
Draining the Oil Sump 
Remove the oil drain hose from its attachment brack-
et and lower it into a container and allow the oil 
to 
drain, 
or 
attach a 
pump 
to 
the end of the drain hose 
and 
pump 
the old oil out.  Make sure the oil drain hose 
is properly secured in its holder after all of the old oil 
has been drained. 
Always observe the old oil as it is removed.  A yel-
low/gray emulsion indicates the presence of water 
in 
the oil.  Although this condition is rare, it does require 
prompt 
attention 
to 
prevent serious damage.  Call a 
competent mechanic should water be present in the 
oil.  Sea water present in the oil can be the result 
of 
a 
fault  in  the exhaust system  attached 
to 
the engine 
and/or 
a siphoning through the sea water cooling cir-
cuit 
into the exhaust, filling it up into the engine (refer 
to 
the installation illustrations on page 26). 
2. 
Replacement of the Oil Filter 
When removing the used oil filter, you may find it help-
ful and cleaner 
to 
punch a hole in the upper and lower 
portion 
of 
the old filter 
to 
drain the oil from it into a 
container before removing  it.  This  helps 
to 
lessen 
spillage.  A  small  style  automotive  filter 
wrench 
should be helpful in removing the old oil filter.  Place 
some paper towels and a plastic bag around the fil-
ter 
when unscrewing it 
to 
catch 
any 
oil left in the fil-
ter. 
(Oil 
or 
any 
other fluid on the engine reduces the 
engine's  cooling ability. 
Please  keep 
your 
engine 
clean.) 
Inspect the old  oil filter as it is  removed 
to 
make sure that the rubber sealing gasket came off 
with the  old  oil  filter. 
If this  rubber sealing  gasket 
remains sealed  against  the  engine block, gently 
remove 
it. 
The replaceable cartridge-type oil filter re-
quires 
no 
cleaning inside, so it may be properly dis-
posed of. 
When installing the 
new 
oil filter element, wipe the filter gasket's sealing surface on the engine 
block 
free of 
oil and 
apply 
a thin coat of clean engine oil 
to 
the rubber gasket 
on 
the oil filter.  Screw the filter 
onto 
the 
threaded oil filter stub, and then tighten the filter firmly 
by 
hand. 
NOTE:  Generic filters are not recommended, as the material standards 
or 
diameters of im-
portant items on generic parts might be entirely different from genuine parts. 
Immediately after 
an oil filter change and oil fill, run the engine 
to 
make sure the oil pressure is normal and that 
there are 
no 
oil leaks around the new oil filter. 
Westerbeke 
Diesel 
Engines 










