Universal M-12 User manual

MANUAL NO. 1-89
---UNIVERSAL--
AMERICAN LEADER IN MARINE POWER SlNCE 1898
SERVICE MANUAL
MODELS
M-12 M2-t2 M3-20 M4-30
M-18 M-25 M-25XP M-35
-------[IDID]]~o~I-----

MANUAL NO. 1-89
---UNIVERSAL--
AMERICAN LEADER IN MARINE POWER SlNCE 1898
SERVICE MANUAL
MODELS
M-12 M2-t2 M3-20 M4-30
M-18 M-25 M-25XP M-35
-------[IDID]]~o~I-----

CONTENTS
NOTE: Refer to the beginning of the individual sections for a complete table ofcontents for that section.
SECTION I - SPECIFICATIONS .................................................... 1-38
SECTION II -PREVENTIVE MAINTENANCE ........................................ 39-44
SECTION III -CONSTRUCTION AND FUNCTION .................................... 45-50
SECTION IV -LUBRICATION, COOLING, AND FUEL SYSTEMS
....................... 51-69
SECTION V - ELECTRICAL SYSTEM ............................................. 71-102
SECTION
VI -DISASSEMBLY AND REASSEMBLy ................................ 103-150
SECTION VII -DYNAMO AND REGULATOR
...................................... 151-165
TROUBLESHOOTING ......................................................... 166-175

NOTES
ii

SECTION I - SPECIFICATIONS
Model M-12 ..................................................................... 2,3
Model M2-12
.................................................................... 4,5
Model M3-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,7
Model M4-30
.................................................................... 8,9
Model M-18
................................................................... 10,11
Model M-25 ................................................................... 12,13
Model M-25XP
................................................................. 14,15
Model M-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16,17
Parts Specifications
............................................................. 18-33
Bolt Torques
................................................................... 34-38
1

UNIVERSAL MODEL M-12
Horsepower
No. of Cylinders
Bore x Stroke
Cubic Inch
Maximum R.P.M.
Cruising Range (Approx.)
Compression Ratio
Electrical Equipment
Lubrication (Eng. Approx. Qts.)
Model 12
10 @ 3600
2
2.52 x 2.45 in.
25
3600
2600 -3300
R. P. M.
23:1
12 Volt - 51 Amp WIGlow Plugs
1.5 -2.0
(SAE 30
HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
(Type AFT. ''fl:' 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
2:1
2.3 Qts.
1 V4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
1751bs.
PIN 301302
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 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

UNIVERSAL MODEL M-12
OIL FILL CAP GLOW PWGS
RS
FUEL RETURN
FUEL FILTER
(AIR BLEED
ON TOP)
SEA
WATER
TO EXHAUST
CLEAN OUT COVER
~ ___ ~
TRANS. DIP STICK & ---"7:'!0'T:
OIL FILL HOLE
ENGINE COUPLI
TRANS. DRAIN
(OPPOSITE SIDE) BELL HSG.
COOLANT BLEED
VALVE ~
TEMP. SENDER -----
F.W. CIRCULATING ---
PUMP
SEA WATER----··
PUMP
V-BELT
THERMOSTAT HSG.
,~ AIR BREATHER
FUEL AIR BLEED
VALVE
~--STOP LEVER
THROTTLE
DIP STICK
BLOCK COOLANT DRAIN
~OILPAN
TIMING PORT OIL DRAIN
COOLANT FILL CAP
/ EXHAUST FLANGE
MANIFOLD DRAIN
~_- HEAT EXCHANGER
DRAIN & ZINC
PANEL PWG
~
FLEX MOUNTS
STARTER
3

UNIVERSAL MODEL M2-12
Horsepower
No. of Cylinders
Bore x Stroke
Cubic Inch
Maximum R.P.M.
Cruising Range (Approx.)
Compression Ratio
Electrical Equipment
Lubrication (Eng. Approx. ats.)
M2-12
11 @ 3600
2
2.6 x 2.45 in
26
3600
2600 -3300
R. P. M.
23:1
12 Volt - 51 Amp WIGlow Plugs
1.5 -2.0
(SAE 30
HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
(Type AFT. "A" or GM-DEXRON® - " 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
2:1
2.3 ats.
1 Y4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
1751bs.
PIN 302735
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 ats. Lub. Oil
and 1 Gal. 50/50 Coolant.
All pictorial views and specifications subject to change without notice.
4

UNIVERSAL MODEL M2-12
FUEL RETURN
FUEL FILTER
(AIR BLEED
ON TOP)
SEA
WATER
TO EXHAUST
CLEAN OUT COVER - ___ ~
TRANS. DIP STICK & ---"""7
OIL FILL HOLE
TRANSMISSION0
ENGINE COU
TRANS. DRAIN
(OPPOSITE SIDE) BELL
HSG.
COOLANT BLEED VALVE
TEMP. SENDER ------ .. A8
F.W. CIRCULATING --~
PUMP
SEA WATER -----
PUMP
GLOW PWGS
INJECTORS
THERMOSTAT
HSG .
.... ~ R BREATHER
FUEL AIR BLEED
VALVE
G"?'#~---STOP LEVER
THROTTLE
DIP STICK
I;;n .. """,", COOLANT DRAIN
~OILPAN
TIMING PORT OIL DRAIN
COOLANT FILL CAP MANIFOLD
/ EXHAUST FLANGE
_--- HEAT EXCHANGER
DRAIN & ZINC
PANEL PWG
~
FLEX MOUNTS
STARTER SOLENOID
STARTER
5

UNIVERSAL MODEL M3-20
Horsepower
No. of Cylinders
Bore x Stroke
Cubic Inch
Maximum R.P.M.
Cruising Range (Approx.)
Compression Ratio
Electrical Equip.
Lubrication (Eng. Approx.
ats.)
18 @ 3600
3
2.60 x 2.45
38.9
3600
2600 -3300
23:1
12 Volt - 51 Amp W/Glow Plugs
3.2
(SAE 30 HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
®
(Type Aft. "A" or GM-DEXRON - II Do not mix different oils)
Transmission Reduction 2:1
Coolant FWC (SO/50 Solution Approx.)
Exhaust Flange
Fuel Type
Fuel Filter
Oil Filter
Engine Operating Temp. Degrees F.
Propeller Rotation
Weight (Ibs.)
Injection Nozzles
3 ats.
1 V4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
2351bs.
PIN 302735
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 ats. Lube
Oil, 1 Gal. SO/50 Coolant.
All pictorial views and specifications subject to change without notice.
6

UNIVERSAL MODEL M3-20
FUEL LINES
FUEL RETURN
FUEL FILTER
(AIR BLEED
ON TO
SEA WATER
TO EXHAUST
CLEAN OUT COVER
TRANS. DIP STICK &
OIL FILL HOLE
TRANSMISSION
ENGINE COUPLING
TRANS. DRAIN
OIL FILL CAP GLOW
PWGS
\ THERMOSTAT HSG.
AIR BREATHER
FUEL AIR BLEED
VALVE
~~-------S'~PLEVER
DIP STICK
CK COOLANT DRAIN
(OPPOSITE SIDE) BELL HSG. TIMING PORT
COOLANT BLEED
VALVE ~.
TEMP. SENDER -----
F.W. CIRCULATING
PUMP
SEA WATER
PUMP
V-BELT
OIL FILTER
COOLANT FILL CAP MANIFOLD
~ EXHAUST FLANGE
/ MANIFOLD DRAIN
PANEL PWG
__ -HEAT EXCHANGER
DRAIN & ZINC
\ FLEX MOUNTS
STARTER SOLENOID
STARTER
7

UNIVERSAL MODEL M4-30
Horsepower 25 @ 3600
No. of Cylinders 4
Bore x Stroke 2.60 x 2.45
Cubic Inch
51.9
Maximum R.P.M. 3600
Cruising Range (Approx.) 2600 -3300
Compression Ratio 23:1
Electrical Equip. 12 Volt - 51 Amp WIGlow Plugs
Lubrication (Eng. Approx. ats.) 4
(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 2:1
Coolant FWC (50/50 Solution Approx.)
Exhaust Flange
Fuel
Type
Fuel Filter
011 Filter
Engine Operating Temp. Degrees F.
Propeller Rotation
Weight (Ibs.)
Injection Nozzles
31
/2 ats.
1 V4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
270
PIN 302735
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 ats. Lube
Oil, 1 Gal. 50/50 Coolant.
All pictorial views and specifications subject to change without notice.
8

UNIVERSAL MODEL M4-30
OIL FILL CAP GLOW
PWGS
FUEL LINES
FUEL RETURN
FUEL FILTER
(AIR BLEED ON TOP)
SEA WATER
TO EXHAUST
CLEAN OUT COVER
TRANS. DIP STICK &
__ _
OIL FILL HOLE
TRANSMISSION
ENGINE COUPLING
TRANS. N
(OPPOSITE SIDE)
F.W. CIRCULATING
PUMP
-------+
SEA WATER
PUMP
V-BELT
BELL HSG.
COOLANT FILL CAP
THERMOSTAT HSG.
EL AIR BLEED VALVE
STOP LEVER
----THROTTLE
DIP STICK
BLOCK COOLANT DRAIN
HAUST FLANGE
MANIFOLD DRAIN
PANEL PWG
--- HEAT EXCHANGER
~-- DRAIN & ZINC
~
FLEX MOUNTS
STARTER SOLENOID
STARTER
9

UNIVERSAL MODEL M-18
Horsepower
No. of Cylinders
Bore x Stroke
Cubic Inch
Maximum R.P.M.
Cruising Range (Approx.)
Compression Ratio
Electrical Equipment
Lubrication (Eng. Approx.
ats.)
14 @ 3200
2
2.60 x 2.45
35
3200
2100/2600 R. P. M.
21:1
12 Volt - 51 Amp WIG low Plugs
2.5 - 3.0
(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
2:1
3.0 qts.
1 V4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
2551bs.
PIN 299517 &299518
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 ats. Lub. Oil
and 1 Gal. 50/50 Coolant.
All pictorial views and specifications subject to change without notice.
10

FUEL RETU
FUEL FILTER
(BLEED ON TOP)
SEA WATER
TO EXHAUST
TRANSMISSION
"---.
SHIFT LEVER
COOLANT AIR BLEED
TEMP. SENDER
BY·PASS HOSE
~
SEA WATER
PUMP
---
ALTERNATOR
V·BELT
\
UNIVERSAL MODEL M-18
OIL FILL CAP
GLOW PLUGS
THERMOSTAT HSG.
FUEL AIR BLEED VALVE
P LEVER
THROTTLE
BLOCK COOLANT DRAIN
TIMING PORT
DECOMPRESSION LEVER
OIL PAN
EXHAUST FLANGE
EXHAUST DRAIN
HEAT EXCHANGER
PANEL PLUG
DRAIN & ZINC
TRANS.
DIP STICK &
OIL FILL HOLE
@--o::::",GINE COUPLING
"*11--- TRANS. DRAIN
OIL DRAIN HOSE
11

UNIVERSAL MODEL M-25
Horsepower 21 @ 3200
No. of Cylinders 3
Bore x Stroke 2.83 x 2.76
Cubic Inch 52
Maximum R.P.M. 3000
Cruising Range (Approx.) 2100/2600 R.P.M.
Compression Ratio 21:1
Electrical Equipment 12 Volt - 51 Amp WIGlow Plugs
Lubrication (Eng. Approx. ats.) 4.0
(SAE 30 HD. (CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
(Type AFT. "Pi' 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
2:1
5 qts.
1 Y4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
285Ibs.)
PIN 299517 & 299518
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 ats. Lub. Oil
and 1 Gal. 50/50 Coolant.
All pictorial views and specifications subject to change without notice.
12

EXHAUST FLANGE
GLOW PLUGS -----::
HEAT EX. DRAIN & ZIN
CLEAN OUT COVERS
TRANS. DIP STICK &
OIL FILL HOLE
TIMING PORT
UNIVERSAL MODEL M-25
FUEL LINES AIR BREATHER
NJECTOR PUMP
INJ. PUMP BLEED
THROTTLE
STOP LEVER
rr--DIP STICK
BLOCK COOLANT
DRAIN
BELL HOUSING
OIL DRAIN HOSE
COOLANT AIR BLEED- __
TEMP. SENDER--
F.W. CIRCULATING
PUMP
SEA WATER
PUMP
ALTERNATOR
OIL FILTER----
REGULATOR
FUEL FILTER
(AIR BLEED ON TOP
OF FILTER)
13
MANIFOLD DRAIN
HEAT EXCHANGER
PANEL PLUG
DRAIN & ZINC
STARTER SOLENOID
TRANSMISSION
TRANS. DRAIN PLUG

UNIVERSAL MODEL M-25XP
Horsepower 23 @ 3200
No. of Cylinders 3
Bore x Stroke
2.95 x 2.76
Cubic Inch 56.6
Maximum R.P.M. 3200
Cruising Range (Approx.) 2100/2600 R.P.M.
Compression Ratio 21:1
Electrical Equipment 12 Volt - 51 Amp WIGlow Plugs
Lubrication (Eng. Approx. Ots.) 4.0 to 4.3
(SAE 30 HD.(CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK
Lubrication (Trans.) FILL TO FULL RING ON DIPSTICK
(Type AFT. "A" 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
2:1
5 qts.
1 Y4" N.P.T.
#2 Diesel
PIN 298854
PIN 300209
Right Hand
2851bs.
PIN 299517 & 299518
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. 50/50 Coolant.
All pictorial views
and specifications subject to change without notice.
14

FUEL FILTER
(AIR BLEED
ON TOP)
SEA
WATER
TO EXHAUST
TRANS. DIP STICK &
OIL FILL HOLE
TRANSMISSION
ENGINE COUPLING
TRANS. DRAIN
(OPPOSITE SIDE)
COOLANT BLEED
VALVE ~ .
TEMP. SENDER - ___ _
BY-PASS HOSE
F.W. CIRCULATING---
PUMP
SEA WATER
PUMP
ALTERNA
UNIVERSAL MODEL M-25XP
OIL FILL CAP
THERMOSTAT HSG.
AIR BREATHER
FUEL AIR BLEED
VALVE
_---- STOP LEVER
. THROTTLE
DIP STICK
~n_"",n. COOLANT DRAIN
MANIFOLD
MANIFOLD DRAIN
PANEL PWG
.---HEAT EXCHANGER
---DRAIN & ZINC
MOUNTS
STARTER SOLENOID
STARTER
15