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Engine Type
Engine Speed
Governor
Combustion Chamber
Bore
&
Stroke
Piston Displacement
Rring Order
Direction of Rotation
Maximum Torque
Compression Ratio
Compression Pressure
(Umit of difference
between cylinders)
Dimensions
Weight
Fuel Consumption
Inclination
Valve liming
Valve Seat Angle
Valve Clearance
General
Distributor
Spark Plug Thread Size
Spark Plug Type
Carburetor (STD type)
BTG 12.5 KW SPECIFICATIONS
SPECIFICATIONS
Gasoline, four-cycle, four-cylinder, fresh water-
cooled, vertical in-line overhead valve
mechanism. {22.5 hp at 1800 rpm max.)
1800 rpm@ 60 Hertz
1500 rpm @ 50 Hertz
Hoof, flyball type, 5% speed regulation
Multi-sphere type
3.03 x 2.74 inches (77 x 69.6 mm)
79.1 cubic inches (1.2961iters)
1-3-4-2
Clockwise, when viewed from the front
63.6 lb-ft (8.8 kg-m) at 1800 rpm
9.2:1
170 psi (12 kg/cm
2 )
at
300 rpm
(2.8 psi [2.0 kg/cm
2 ])
Height: 23.63 inches (600.10 mm)
Width: 18.75 inches (476.25 mm)
Length: 33.63 inches {854.20 mm)
5331b's {241.7 kgs)
1.6 U.S.gph (6.0 LPH) at full rated output
(approximate)
Continuous 15°
TemporarY 25° (not to exceed 20 min.)
Intake Opens 15° BTDC
Intake Closes 44° ABDC
Exhaust Opens 53° BBDC
Exhaust Closes 46° ATDC
Intake 45o
Exhaust45°
Intake 0.0098 inches (0.25mm)
Exhaust 0.0098 inches (0.25mm)
IGNITION
BatterY ignition, 12 volts, negative ground,
distributor with igniter, mobile pick-up, ignition
coil and spark plugs
Solid state type with signal generator and
igniter
14mm x 1.25 pitch
· Westerbeke part number 033805
Down draft type, single barrel with USCG
approved flame arrester
General
Oil Riter
Sump Capacity
(not including filter)
Operating Oil Pressure
(engine hot)
Oil Grade
General
Fuel
UftPump
Fuel Screen (engine)
Air Cleaner
Air Row
(engine combustion
General
Operating Temperature
Fresh Water Pump
Sea Water Pump
Sea Water Row
System Capacity
(fresh water)
LUBRICATION
Pressure type by Trochoid pump, chain-driven
by crankshaft
Full flow, paper element, spin-on type
3.9 U.S. qts (3.7 liters)
25-35 psi (1.7 - 2.50 kg/cm
2 )
API Category SJ, SL, SM or better.
~AE
30W, IOW-30 or lOW-40
FUEL
Conventional carburetor type with fuel lift
pump
Unleaded 89 Octane or better:
Ethanol blend EIO maximum.
12
volt
DC, lift capacity 6ft (1.8m)
Reusable screen type (one at inlet to
carburetor and one in base of early style
fuel pump)
Metal screen type - cleanable
41.1 elm (1.16 cmm)
COOLING
Fresh water-cooled block, thermostatically-
controlled
with
heat exchanger.
130-150° F (55 -66° C)
Centrifugal type, metal impeller, belt-driven.
Positive displacement, rubber impeller,
belt-driven.
6.7
gpm (25.31pm) at 1800 rpm
(measured before discharging into the exhaust
elbow)
5 qts (4.71iters)
·
.
ELECTRICAL .
.
Starting BatterY
BatterY Capacity
DC BatterY Charger
Starter
DC No-Load Current
DC Cranking Current
12-volt negative ground
400-600 C.C.A. rated minimum
90 -125 (ampere-hours)
12VDC SO amp rated alternator
12-Volt, 1.3 Kw, reduction type, solenoid
mounted
90 Amp (max) at 11.5 volts
175- 200 amps (cold engine).
Engines & Generators
53
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Troubleshooting
