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Storage
If the engine will be out of service for two months or
more, use the following storage procedure:
1. Clean the exterior surfaces of the engine. On EFI
engines, avoid spraying water at the wiring
harness or any of the electrical components.
2. Change the oil and filter while the engine is still
warm from operation. See “Change Oil and Oil
Filter” on page 9.
3. The fuel system must be completely emptied, or
the gasoline must be treated with a stabilizer to
prevent deterioration. If you choose to use a
stabilizer, follow the manufacturers
recommendations, and add the correct amount for
the capacity of the fuel system. Fill the fuel tank
with clean, fresh gasoline. Run the engine for 2-3
minutes to get stabilized fuel into the rest of the
system. Close fuel shut-off valve when unit is
being stored or transported.
To empty the system, run the engine until the tank
and system are empty.
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. On units with EFI engines, disconnect the negative
(-) battery cable or use a "battery minder" trickle
charger while the unit is in storage.
6. Store the engine in a clean, dry place.
Parts Ordering
The engine Specification, Model, and Serial Numbers
are required when ordering replacement parts from
your Kohler Engine Service Dealer. These numbers are
found on the identification plate which is affixed to the
engine shrouding. Include letter suffixes if there are
any. See “Engine Identification Numbers” on page 6.
Always insist on genuine Kohler parts. All genuine
Kohler parts meet strict standards for fit, reliability, and
performance.
Major Repair
Major repair information is available in Kohler Engine
Service Manuals. However, major repair generally
requires the attention of a trained mechanic and the
use of special tools and equipment. Your Kohler
Engine Service Dealer has the facilities, training, and
genuine Kohler replacement parts necessary to perform
this service. For Sales & Service assistance call
1-800-544-2444 (U.S. & Canada) or contact your
Kohler Engine Dealer or Service Distributor, they're in
the Yellow Pages under Engines-Gasoline.
Specifications
Model: ....................................................................... CH18,20,22.......................................... CH25,26,730,740,745
Bore: ..................................... mm (in.) ..................... 77 (3.03)
#
.............................................. 83 (3.27)
Stroke: ................................... mm (in.) ..................... 67 (2.64) ...............................................67 (2.64)
Displacement: ....................... cm
3
(in
3
) ..................... 624 (38.1)
#
............................................ 725 (44.0)
Power (@3600 RPM): ........... kW (HP) ..................... 13.4 (18*)/14.9 (20*)/16.4 (22*) ........... 18.4 (25*)/19.4 (26*)
18.6 (25*)/20.1 (27*)/20.9(28*)
Max. Peak Torque (@ RPM): N·m (ft. lb.) ..................... 43.7 (32.2) @2200................................ 54 (39.5) @2200
44.3 (32.7) @2400 ................................54.2 (40.0) @2800
50.6 (37.3) @2400................................ 53.7 (39.6) @2600
58.6 (43.2) @2400
57.9 (42.7) @2600
Compression Ratio: ................................................. 8.5:1 ..................................................... 9.0:1
Weight: .................................... kg (lb.) ..................... 41 (90) .................................................. 43 (94)
Lubrication: ........................................ Full Pressure w/full Flow Filter
Oil Capacity (w/filter) - approximate,
determined by oil filter and oil cooler used: 1.6-1.8 L (1.7-1.9 U.S. qt.)
Exhaust Emission Control System for models CH18,20,22,23,25,730,740 is EM.
Exhaust Emission Control System for models CH26 and CH745 are EM, O2S, ECM, MFI.
*Horsepower ratings exceed Society of Automotive Engineers Small Engine Test Code J1940. Actual engine horsepower is
lower and affected by, but not limited to, accessories (air cleaner, exhaust, charging, cooling, fuel pump, etc.), application,
engine speed and ambient operating conditions (temperature, humidity, and altitude). Kohler reserves the right to change
product specifications, designs and equipment without notice and without incurring obligation.
#
CH22 or CH23 engines with Spec. Numbers of 765xx have bore size of 80 mm (3.15 in.) and displacement of 674 cm
3
(41.1 in
3
).