Westerbeke Universal M-50 User manual

SERVICE MANUAL
M- 30
MODELS
M- 40
PIN 200154
M- 50

CONTENTS
NOTE: Refer to the beginning ofthe individual sections for a cqrnplete table of contents forthat section.
SECTION I - SPECIFICATIONS .................................................... 1-18
SECTION II -PREVENTIVE MAINTENANCE ........................................ 19-24
SECTION III -CONSTRUCTION AND FUNCTION .................................... 25-30
SECTION IV -LUBRICATION, COOLING, AND FUEL
SySTEMS ....................... 31-49
SECTION V - ELECTRICAL SYSTEM .............................................. 51-82
SECTION VI -DISASSEMBLY AND REASSEMBLY ................................. 83-130
SECTION VII -DYNAMO AND REGULATOR ...................................... 132-147
TROUBLESHOOTING ......................................................... 148-157

NOTES
ii
I
a
I
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~
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SECTION 1- SPECIFICATIONS
Model M-30 ...................................................................... 2,3
Model M-40 ..................................................................... 4,5
Model .M-50 .................................................. , .................. ,. 6,7
Parts Specifications . ............................................................. 8-15
Bolt Torques. ................................................................. .16-18
1

UNIVERSAL MODEL M-30 SPECIFICATIONS
Horsepower
No. of Cylinders
Bore x Stroke
Cubic Inch
Maximum R.P.M.
Cruising Range (Approx.)
Compression Ratio
Electrical Equipment
Lubrication (Eng. Approx. Qts)
24 @ 2800
3
3.00 x 3.23
68
2800
2000-2400 R.P.M.
21:1
12 Volt - 51 Amp W/Glow Plugs
5.0 to 5.5
(SAE 30 HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
(Type AFT. "/1\' or GM-DEXRON - II Do not mix different oils)
Transmission Reduction
Coolant FWC (50/50 Solution Approx.)
Exhaust Flange
Fuel
Type
Fuel Filter
Oil Filter
Eng. Operating
Temp. Degrees F.
Propeller Rotation
We.ight (Ibs.)
Injection Nozzle
2:1
6 qts.
1 V4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
4251bs.
PIN 298787 & 298788
Engine is governorcontrolled to prevent overspeed. It is recommended to carry the following extra parts should
the need arise: V-Belt, Sea Water Pump Impeller, Fuel & Lube Oil Filters, 1 Qt. of Trans. Oil, 2 Qts. Lub. Oil
and 1 Gal. 50/50 Coolant.
All pictorial views and specifications subject to change without notice.
2

GLOW PLUG~- ____ __
SEA WATER OVERBOARD
HEAT EX. DRAIN & ZINC_
TRANS. DIP STICK
OIL FILL HOLE ---
SHIFT LEVER
ENGINE COUPLIN
UNIVERSAL MODEL M-30
FUEL LINES
TIMING PORT
AIR BREATHER
FUEL AIR
LEED VALVE
c---_ STOP LEVER
'----OIL FILTER
BLOCK COOLANT DRAIN
COOLANT AIR BLEED VALVE COOLANT FILL CAP
THERMOSTAT HSG.
F.W. CIRCULATING
PUMP ---,
ALTERNATOR
SEA WATER PUMP
V·BELT
DIP STICK OIL PAN
"3
MANIFOLD
AUST FLANGE
MANIFOLD DRAIN
HEAT EXCHANGER
HEAT EX. CLEAN·OUT
COVERS
----DRAIN AND ZINC
TRANSMISSION
n_'I"~_ DRAIN PLUG

UNIVERSAL MODEL M-40 SPECIFICATIONS
Horsepower
No.
of Cylinders
Bore x Stroke
Cubic Inch
Maximum R.P.M.
Cruising Range (Approx.)
Compression Ratio
Electrical Equipment
Lubrication (Eng. Approx. ats.)
32 @ 2800
4
3.00 x 3.23
91
2800
2000/2500 R. P.M.
21:1
12 Volt - 51 Amp WIGlow Plugs
8.0 to 8.5
(SAE 30 HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
.
Lubrication (Trans.) FILL
TO FULL RING ON DIPSTICK
(Type AFT. "1\' or GM-DEXRON - II Do not mix different oils)
Transmission Reduction
Coolant FWC (50/50 Solution Approx.)
Exhaust Flange
Fuel Type
Fuel Filter
Oil Filter
Eng. Operating
Temp. Degrees F.
Propeller Rotation
Weight (Ibs.)
Injection Nozzle (Prior to
Ser. #315023)
(After
Ser. #315023)
2:1
8 qts.
1 V4" N.P.T.
#2 Diesel
PIN 298854
PIN 299927
Right Hand
5451bs.
PIN 299517 &299518
PIN 299567
Engine is governorcontrolled to prevent overspeed. It is recommended to carry the following extra parts should
the need arise: V-belt, Sea Water Pump Impeller, Fuel & Lube Oil Filters, 1 at. of Trans. Oil, 2 Ots. Lub. Oil
and 1 Gal. 50/50 Coolant.
All pictorial views and specifications subject to change without notice.
4

FUEL RETURN
GLOW PLUGS- ____ _
SEA WATER OVERBOARD
HEAT EX. DRAIN & ZIN
TRANS. DIP STICK
OIL FILL HOLE ---
ENGINE COUPLING/
UNIVERSAL MODEL M-40
FUEL LINES
TIMING PORT
AIR BREATHER
FUEL AIR
BLEED VALVE
---THROTTLE
-- STOP LEVER
--OIL FILTER
BLOCK COOLANT DRAIN
EX MOUNTS
COOLANT AIR BLEED VALVE COOLANT FILL CAP
THERMOSTAT HSG
F.W. CIRCULATING
PUMP ---'
ALTERNATOR
SEA WATER PUMP
V·BELT
DIP STICK OIL PAN
5
MANIFOLD
MANIFOLD DRAIN
HEAT EXCHANGER
HEAT EX. CLEAN·OUT
COVERS
---- DRAIN AND ZINC
TRANSMISSION
RANS. DRAIN PLUG

UNIVERSAL MODEL M-50 SPECIFICATIONS
Horsepower 44 @ 3000
No. of Cylinders 4
Bore x Stroke
3.35 x 3.23
Cubic Inch 115
Maximum R.P.M. 3000
Cruising Range (Approx.) 2000/2500 R.P.M.
Compression Ratio 21:1
Electrical Equipment 12 Volt - 51 Amp WIGlow Plugs
Lubrication (Eng. Approx. Ots.) 8.5
(SAE 30 HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
Transmission Reduction 1.9:1
Coolant FWC (50/50 Solution Approx.) 8 qts.
Exhaust Flange 1
1/4" N.P.T.
Fuel Type #2 Diesel
Fuel Filter
PIN 298854
Oil Filter PIN 299927
Eng. Operating
Temp. Degrees F. 165
0 to
195
0
Propeller Rotation Right Hand
Weight
(Ibs.) 545 Ibs.
Injection Nozzle PIN 299567
Engine
is governor controlled to prevent overspeed. It is recommended to carry the following extra parts should
the need arise: V-Belt, Sea Water Pump Impeller, Fuel & Lube Oil Filters, 1 at. of Trans. Oil, 2 Ots. Lub. Oil
and 1 Gal. of 50/50 Coolant.
All pictorial views and specifications subject
to change without notice.
6

UNIVERSAL MODEL M-50
FUEL LINES
FUEL RETURN
GLOW PLUGS- ____ _
SEA WATER OVERBOARD
HEAT EX. DRAIN & ZINC_
TRANS. DIP STICK
OIL FILL HOLE --
SHIFT LEVER
ENGINE COUPLING/
TIMING PORT
COOLANT AIR BLEED VALVE
THERMOSTAT HSG.
F.W. CIRCULATING
PUMP ---
ALTERNATOR
SEA WATER PUMP
V·BELT
DIP STICK
AIR BREATHER
INJECTOR PUMP
FUEL AIR
--, ... , EED VALVE
------ TH ROTTLE
,..--- STOP LEVER
~-OIL FILTER
BLOCK COOLANT DRAIN
LEX MOUNTS
COOLANT FILL CAP
MANIFOLD
EXHAUST FLANGE
/ LD DRAIN
HEAT EX. CLEAN·OUT
COVERS
. DRAIN AND ZINC
NS. DRAIN PLUG
STARTER
OIL PAN
7