Installation manual

120N6 SPECIFICATIONS
Engine Type
Aspiration
Governor
Bore & Stroke
Piston Displacement
Firing Order
Direction of Rotation
Engine Torque
Compression Ratio
GENERAL
Diesel, six cylinder, four-cycle, Vertical in-line,
overhead valve, fresh water cooled direct
injection, marine engine. 120 hp @2500 rpm.
Naturally aspirated.
Integral with injection pump.
4.13 x 4.92 inches (105.0 x 125.0 mm)
296 cubic inches (6.5 liter)
1-5-3-6-2-4
Clockwise, when viewed from the front.
298 ft-Ib @ 1500 rpm.
17:1
Dimensions - inches (mm) Height: 32.5 inches (823mm)
(645mm)
(1410 mm)
w/out transmission Width: 25.2 inches
Length: 56.4 inches
Weight(dry) 1175 Ibs (534.1 kgs).
TUNE-UP SPECIFICATIONS
Compression Pressure
(Limit of difference
Injector Pressure
Valve Seat Angle
Valve Clearance
(engine cold)
Engine Speed
General
Operating Temperature
Fresh Water Pump
Raw Water Pump
Coolant (Fresh Water)
System Capacity
Exhaust Elbow
Exhaust Hose Size
441 psi (31 kg/cm') at 200 rpm
Not to exceed 28.44 psi (20.0 kg/cm').
2631 psi (180 kf/cm').
Intake 45°
Exhaust 45°
Intake and exhaust
0.016 inches (0.40 mm)
Idle: 600 - 900 rpm
Cruise: 1800 - 2200 rpm
Max: 2400 -2500 rpm
COOLING SYSTEM
Fresh water-cooled block, thermostatically-
controlled with heat exchanger.
180 - 190
0
F (77 - 88
0
C)
Centrifugal type, metal impeller, belt-driven.
Positive displacement, rubber impeller,
engine-driven.
25 US qts (23.7 liters)
EXHAUST SYSTEM
45° elbow
4" I.D. (101.6 mm) hose
ENGINE AIR REQUIREMENTS
Combustion Air
240cfm
Note: The pressure differential between the outside of the engine compart-
ment versus the inside of the engine compartment should not exceed 2
inches of water (51 mm) at full open throttle (measure with a manometer).
General
Fuel
Fuel Injection Pump
Fuel Injection TIming
Nozzle
Fuel Filter
(on engine)
Air cleaner
Air Flow
(engine combustion)
Fuel Consumption
FUEL SYSTEM
Closed system with bleed pOints.
No.2 diesel oil (cetane rating of 45 or higher).
BOSCH Model A type (In-line).
WBTDC
Multi-hole
Full flow replaceable.
Replaceable paper element.
240 cfm
6.5 U.S. gph (24.6Iph).
ELECTRICAL SYSTEM
Starting Battery
Battery Capacity
DC Charging Alternator
Starting Aid
Starter
DC No-load Current
DC Cranking Current
12 Volt, (-) negative ground
750 - 900 Cold Cranking Amps (CCA)
51 Amp rated, belt-driven
Glow plugs
12 Volt, 3 I<N{ actuated shift.
±2% of rated amps
400 CCA
LUBRICATION SYSTEM
General
Oil Filter
Sump Capacity
(not including filter)
Operating Oil Pressure
(engine hot)
Oil Grade
General
Gear Ratio (Standard)
Gear type/pressure circulation
Full flow, paper element. spin-on type.
22 U.S. qts (20.8 liters)
25 - 85 psi (3.5 - 4.2 kg/cm')
API Specification CF or CG-4,
SAE 30, 1 OW-3~, 15W-40
TRANSMISSION
(HURTH Standard Transmission) Case-hardened
helical gears, hydraulically operated multiple disc
clutch.
2:00:1 (Hurth 45A) or (Hurth 63A)
Propeller Shaft Right handed-standard transmission.
Propeller Recommendations 22x16 P-2 blade or 22x14 P-3 blade
(using standard propeller should allow the engine to reach its
transmission) full rated rpm (2500 + 000 -100) at full open
throttle while underway in forward gear.
Lubricating Fluid Dextran /11
Transmission Sump
Capacity Hurth 45
Hurth 63
2.13 US qts (2.0 liters) approximate.
4.2 US qts (4.0 liters) approximate.
Engines & Generators
50