Westerbeke 12C- TWO Operator's Manual page 61

Engine Type
Governor
Valve Mechanism
Combustion Chamber
Bore & Stroke
Piston Displacement
Firing Order
Direction of Rotation
Maximum Torque
Compression Ratio
COmpression Pressure
Valve Seat Angle
Valve Clearance
(engine cold)
Dimensions
Inclination
Dry Weight
Fuel Consumption
Idle Speed
Cruise Speed
12C AND 120 TWO ENGINE SPECIFICATIONS
SPECIFICATIONS
Diesel;"four-cycle, two-cylinder, fresh water-
coated, vertical in-line.
12 Hp
@
3000 rpm maximum
Mechanical, centrifugal weight type
Overhead
Swirl chamber type
2.99 x 2.76 inches (76 x 70 mm)
3B.75 cubic inches (0.635 liters)
1 - 2
Clockwise, when viewed from the front.
30 Ib-ft (4.15 kg-m) at 2200 rpm
23:1
39B psi (28 kg/cm') at 2BO rpm
Intake 45°
Exhaust 45°
Intake 0.010 inches (0.25)
Exhaust 0.010 inches (0.25)
Height 19.75 (501.65)
Width: 17.22 inches (437.3)
Length: 25 inches (635)
Continuous 14°
Temporary 25' (not to exceed 30 min.)
2281bs (103.4 kgs)
1.1 US gph (4.1Iph)
at 3600 rpm (approximate)
1000 -1200 rpm
2000 - 2500 rpm
LUBRICATION SYSTEM
General
Operating Oil Pressure
(engine hot)
Oil Grade
Oil Filter
(Pn. #036920)
Sump Capacity
(including filter)
General
Fuel
Injection Pump
Engine Timing
(Spill Timing)
Injection Pressure
Nozzle
Air cleaner
Air Flow
(engine combustion)
Lift Pump
(PN #039275)
General
Pressure type by Trochoid pump, gear-driven,
with external pressure valve relief
15-45 psi (1.0-3.1 kg/cm')
API Specification CF. CF-4, CG-4, CH-4 or CI-4
SAE 15W-40 (all season)
Full flow, paper element, spin on
3.0 U.S.
q\s
(2.B liters)
FUEL SYSTEM
Open flow, self-bleeding
No.2 diesel (cetane rating of 45 or higher)
In-line plunger type (BOSCH)
19'
±
l' BTDC
Static
1991 psi (140 kg/cm2)
Throttle type
Metal screen type-cleanable
34 cfm (0.96 cmm)
12 volt DC lift capacity of 5' (1.5 mm) wet
COOLING SYSTEM
Fresh water-cooled block, thermostatically-
controlled with heat exchanger
ELECTRICAL SYSTEM
Operating Temperature
Fresh Water Pump
(PN# 037015)
170 -190' F (77 - 8B' C)
Centrifugal type, metal impeller, belt-driven
Starting Battery
Battery Capacity
Starting Aid
Starter Motor
DC No-Load Current
Cold Cranking Current
Alternator
Regulator
12 Volt, (-) negative ground
600 - BOO CCA (Cold Cranking Amps)
Glow plugs, sheathed type
12 Volt. 1.2 Kw, solenoid, actuator shift
100 Amps at 11.5 Volts (3000 rpm, min)
125 Amps at 10 Volts (B05 rpm, min)
12 Volt DC, 50 Amps
Internal regulator, built into alternator
Raw Water Pump
(PN# 033636)
Raw Water Flow
(measured before
discharge into exhaust
elbow)
System Capacity
(Fresh Water)
Positive displacement, rubber impeller,
mechanically-driven
11.1 US gmp (42Ipm) at 3000 rpm-approx.
2.9 US qts (2.7 liters)
TRANSMISSIONS
JS Model
PRMBO
BW7
2.47:1 reduction (See Transmission pages)
2.50:1 reduction
2.47:1 reduction
Propeller Rotation Right hand turning - Standard Transmission
Propeller Shaft 3/4" diameter (minimum)
~
WESTERBEKE
Engines
&
Generators
54