Westerbeke Four-236 User manual

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SAFE DEPENDABLE POWER
FOR LARGE AUXILIARIES AND SMALL WORK BOATS where high torque
over long periods is more important than a high horsepower rating.
The FOUR ·236 is another of the WESTER ·
BEKE family of lightweight, compact marine
diesel engines. Good design and fine work·
manship make this a truly dependable diesel
engine -one that, with proper maintenance.
will give smooth , trouble-free service year
after year.
Where space in a boat is limited, try the
FOUR·236. We have made every effort to reo
duce overall dimensions and to make the
engine accessible for routine maintenance in
usual yacht installations. We have a variety
of engine mounts which may be required
when the engine is installed in the wineglass
sections aft in a sailboat.
Owners of our FOUR·236 report unusually
good fuel economy. While we all recognize
the safety
and economy of diesel fuel, the
Westerbeke
FOUR ·236 engine squeezes extra
miles out of each tankful.
For the finest in lightweight, compact marine diesel
engines, see Westerbeke. In the 50 to 70 h. p. range,
try the FOUR ·236.

R eve r se a nd Reduction Ge ar Dimen sions
Rat io
l e ngth
Off se t Radius
A B C
D irec t
Dr ive
10 %"
1.5 :1
1 6¥."
*.
41h"
2.0:1 16
%'
I ",'
4 Y.z'"
2.5:1
16
l
A"
1 %,'"
5':1."
o
B .r __ ,d
L i(~-
.-- ' It --
T 'OJ
1I' li t'
c 1.. ... ..... III
'-- .. H I
r----~_A -1--:1. - 32*· ~,1
Type :
Di
splacement :
Pow er:
Compress i on Ratio :
We
ig ht :
Dimens i ons :
Cylinde r Block :
Cylinder He ad :
Crank Shaft :
Main Bearin gs:
Cam Shaft :
Connectin g Rods :
P
is ton s:
lubr ic atin g Sys tem:
Coolin g System :
Fu
el ln lec t io n System
Ele
ctrica l Equi pm en t:
S tart ing:
Re verse G ear:
4· cylinder, in l ine, 4 cycle .
236 cu. in . - B ore 3.875 ". S tr oke 5 ".
72 HP at 2500 RPM intermittent. 63 HP at
2250 RPM con t inuous. (See curve be l ow .)
16:1
980 pounds with hydraulic r everse and reo
duction gea r.
See drawing above.
One piece iron alloy cas t ing with dry cylinder
liners . Full length water jackets.
Iron alloy cas t ing wit h wire mesh reinforced
asbestos gasket. Over head varves.
Chrome molybdenum steel forging .
F
iv e replaceab le main bearings.
H igh duty cast ir on with three pressure ·
lubricated bearings.
Molybdenum stee l forgings, with rep l aceable
bearings.
H igh silicon al uminum alloy castings .
F ull pressure oil supply delivered by r otary
gear · driven pump, with relie f valve , full · flow
filter, and lube oil cooler .
Fresh water, cooled either by on·board heat
exchanger and raw water pump or by a keel
cool i ng system, cools engine block, exhaust
manif o ld , engine oil, and hydraulic gear oil.
Diaphr ag m lift pump su pplies the r otary dis ·
tributor inject i on pump through a paper·
element secon da ry fuel fIlter. Mult l· hole
atomizers discharge fuel i nto combustion
chamber fo rmed in p isto n crown .
12 volts . 40 am pere alternator standard .
12
lIolt positive engaging he avy duty start i ng
motor . A Th ermostart heater fitted in intake
m anifo ld aids cold starting.
Manual and hydraulic gears in the f ollowin g
rati os: direct dr ive. 1.5:1, 2: }, 2.5:1, 3:1 for
left hand ro tat io n. 1.9:1 and 2.2:1 hydraul ic
for right hand rotation.
The light weight and compact dimensions of the FO UR· 236
make it well suited for auxiliary power in large sailing
ya chts , while its high standards of constr uction and de·
pendability and excellent fuel economy appeal to oper -
ators of small commercial craft .
Angle of In st a llation :
Standard Equipment:
Opt i on al E xt ras :
Se rv ice & Parts :
,
;I!
o
'"
170 maximum .
Fresh
wate r cooli ng system . i ncl u di ng r aw
and fres h wat er pumps , heat exc h ange r and
ex h aust manifold: f ue l oi l lift pump , injec·
tion pump , and pr im ary and secondary
filters: lube oil filter. cooler, sump pump and
hose: reverse gear oil cooler: 12 vo lt sta rter.
wi th switch and keys; 40 amp alternator with
oil pressure switc h and regu lat or; and iII us·
trated instructio n manual.
Various instrumen t panels , adjustable flexi ·
ble m ounts, 60 amp alternator, hi · capacity
fuel filter and wa t er t rap . " A qua larm " aud,·
ble alarm syste m, and various engine mo unt ·
ing systems .
Westerbeke marine diesel engines and gen·
erat or sets are so ld by distribu t ors in all
m ajor port cities in the United Sta tes. F or
m ore remo te areas, air f reight req ui res only
a few days.