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