Storage
When the engine is not in use, use the following
storage procedure. Federal, state, or local laws
governing LPG fuel tank storage may also apply.
Follow the applicable storage laws.
1. Clean the exterior surfaces of the engine.
2. Change the oil and fi lter while the engine is still
warm from operation. See Change Oil and Oil
Filter on page 9.
3. Turn valve on LPG tank off and run engine until
the fuel system is empty. Turn ignition key switch
off . Separate LPG tank from the unit and store
separately in an area designated for safe LPG tank
storage.
4. Remove the spark plugs. Add one tablespoon of
engine oil into each spark plug hole. Install the
plugs, but do not connect the plug leads. Crank
the engine two or three revolutions.
5. Store the engine in a clean, dry place. Store the
fuel tank in a designated safe LPG storage area at
all times when not in use.
Specifi cations
Bore
Stroke
Model
mm (in.)
mm (in.)
CH640
77 (3.03) 67 (2.64)
CH730
83 (3.27) 67 (2.64)
CH740
83 (3.27) 67 (2.64)
*approximate, determined by oil fi lter and oil cooler used.
Exhaust Emission Control System for gaseous fuel models CH640, CH730, and CH740, is EM for U.S. EPA,
California, and Europe.
Displacement
Max. Torque
cm
3
(in.
3
)
N·m (ft. lb.)
44 (32)
624 (38)
@ 2500 RPM
54 (39.5)
725 (44)
@ 2400 RPM
57 (42.3)
725 (44)
@ 2400 RPM
Parts Ordering
The engine Specifi cation, Model, and Serial Numbers
are required when ordering replacement parts from
your Kohler Engine Service Dealer. These numbers
are found on the identifi cation plate which is affi xed
to the engine shrouding. Include lett er suffi xes if there
are any. See Engine Identifi cation Numbers on page 6.
Always insist on genuine Kohler parts. All genuine
Kohler parts meet strict standards for fi t, reliability,
and performance.
Major Repair
Major repair information is available in Kohler
Engine Service Manuals. This type of repair generally
requires the services of a trained mechanic and the
use of special tools and equipment. Kohler Engine
Service Dealers have the facilities, training, and
genuine Kohler replacement parts necessary to
perform this service.
For the nearest Sales & Service location:
• visit our website www.kohlerengines.com
• call 1-800-544-2444 (U.S. & Canada)
• look in the yellow pages under Engines-Gasoline
Compression
Weight
Ratio
kg (lb.) Lubrication
8.5:1
41 (90)
9.0:1
43 (94)
9.0:1
43 (94)
Oil Capacity
(w/fi lter)*
Full Pressure
1.6-1.8 L
w/full Flow
(1.7-1.9
Filter
U.S. qt.)
15
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