Kohler 5ERKM

TP-6079 3/00 1Section 1 Specifications
Section 1 Specifications
1.1 General
The 5ERKM and 4EFRKM units are powered by a
one-cylinder, air-cooled, four-cycle gasoline engine.
Kohler Co. develops all Kohler mobile generator set
ratings using accepted reference c onditions of 25_C
(77_F) and pressure of 98.9 kPa (29.2 in. Hg) dry
barometer. ISO 3046 and ISO 8528-1 include reference
conditions and output calculations. Obtain technical
information bulletin (TIB-101) on ratings guidelines for
complete ratings definitions.
1.2 Engine
Engine Specifications
Engine manufacturer Kohler
Engine model CS12
Number of cylinders 1
Cylinder block material Aluminum
Cylinder head material Aluminum
Piston rings
2 compression
1 oil control
Governor Mechanical
Bore x stroke, mm (in.) 85 x 63 (3.35 x 2.48)
Displacement, L (CID) 0.357 (21.79)
Compression ratio 8.1:1
Horsepower, 60/50 Hz 11.5/8
RPM, 60/50 Hz 3600/3000
Lubrication system Splash
Lube oil capacity L (U.S. qts) 2.0 (2.1)
Oil recommendation, API SC or SH
Battery voltage, standard, DC 12
Battery CCA recommendation,
min.
250
Battery charging 10 amps
Starter motor Bendix automotive type
1.3 Fuel
Fuel System Specifications
Fuel recommendation Unleaded 87 octane
Fuel pump Electric
Fuel pump, max. lift, m (ft.) 0.9 (3)
Fuel pump operating, kPa (psi) 13.8--24.1 (2.0--3.5)
Fuel pump inlet hose ID, mm (in.) 6.35 (0.25)
1.4 Generator
Component Specifications
Hot exciter field voltage/current
readings at rated voltage
No load (63 Hz) (volts/amps) 10.1/4.4
Full load (60 Hz) (volts/amps) 50.5/8.5
Cold main field (rotor) resistance (ohms) 3.7
Stator output voltages with separately
excited generator, using 12-volt battery
(60 Hz only)
1--2, 3--4, 33--44 (VAC) 145
55--66 (VAC) 190
B1--B2 (VAC) 14
Cold stator resistance
1--2, 3--4, 33--44 (ohms) 0.32
55--66 (ohms) 1.70
B1--B2 (ohms) 0.05
1.5 Torque
Component Torque Nm (in. lb.)
Rotor bolt 23.1 (204)
Generator overbolts 13.6 (120)
Mounting plate to end bracket
bolts
6.8 (60)
Lift eyebolts 19.0 (168)
Generator adapter to engine
bolts
14.9 (132)
Engine oil drain boss (inside
generator adapter)
47.5 (420)
Generator adapter to exhaust
manifold
13.6 (120)
Spark plug 12--17 (106--150)