Kohler 12RES Service

TP-6196 10/0914 Section 1 Specifications
See the List of Related Materials in the Introduction
Section.
1.4 E ngine Specifications
Engine S pecification
8.5 kW
(60 Hz)
12 kW
(60 Hz)
Manufacturer Kohler
Model CH20 CH740
Cycle 4
Number of cylinders 2
Compression ratio 8.5:1 9.0:1
Displacement, cc (cu. in.) 624 (38.0) 725 (44.0)
Rated power, propane fuel,
kw (HP)
11.5 (15.4) 17.6 (23.6)
Rpm 3600
Bore x stroke, mm (in.)
77 x 67 (3.03
x 2.64)
83 x 67 (3.27
x 2.64)
Valve material
Steel/Stellite#
Cylinder block material Aluminum w/cast iron liners
Cylinder head material Aluminum
Piston rings 2 compression/1 oil
Crankshaft material Heat-treated ductile iron
Main bearings: number,
type
2, parent material
Governor Electronic
Lubrication system Full pressure
Oil capacity (w/filter), L (qt.) 1.9 (2.0) 2 (2.1)
Oil pressure, kPa (psi) 172--241 (25--35)
Fuel system LP gas or natural gas
LP/natural gas minimum
supply pressure,
in. H
2
O (oz./in.
2
)
7--11 (4--6)
Battery v oltage 12 VDC
Battery ground Negative
Spark plug gap, mm (in.) 0.51 (0.020) 0.76 (0.030)
Ignition system
Capacitor
Discharge
Smart S park
Capacitor
Discharge
Starter motor Electric, solenoid shift
Cooling system Air-cooled
1.5 Torque Specifications
Torque Specifications, Nm (ft. lb.) 8.5/12 kW
Alternator overbolts 7 (5)
Alternator thrubolt 40 (28)
Cylinder head nuts 30 (40.7)
Generator adapter screws 40 (28)
Muffler flange bolts 24 (17.7)
Oil filter 5.7--9.0 (4.2--6.7)
Spark plug 24.4--29.8 (18--22)

Kohler 12RES Specifications

General

Brand	Kohler
Model	12RES
Category	Portable Generator
Language	English