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4. For a Warm Engine – Return choke to “off”
position as soon as engine starts.
Stopping
1. Remove the load by disengaging all PTO driven
attachments.
2. For CH18-25 Engines Without A Shutdown
Solenoid: Move the throttle to the “slow” or
“low” idle position. Allow the engine to run at idle
for 30-60 seconds; then stop the engine.
For CH18-25 Engines Equipped With A
Shutdown Solenoid: Position the throttle control
somewhere between half and full throttle; then stop
the engine.
For CH26 Engines: Turn key ‘‘off’’ to stop
engine.
Battery
A 12 volt battery is normally used. Refer to the
operating instructions of the equipment this engine
powers for specific battery requirements.
If the battery charge is not sufficient to crank the
engine, recharge the battery (see page 12).
Operating
Angle of Operation
This engine will operate continuously at angles up to
25°. Check oil level to assure crankcase oil level is at
the “F” mark on the dipstick.
Refer to the operating instructions of the equipment this
engine powers. Because of equipment design or
application, there may be more stringent restrictions
regarding the angle of operation.
NOTE: Do not operate this engine continuously at
angles exceeding 25° in any direction. Engine
damage could result from insufficient
lubrication.
Cooling
NOTE: If debris builds up on the grass screen or other
cooling air intake areas, stop the engine
immediately and clean. Operating the engine
with blocked or dirty air intake and cooling
areas can cause extensive damage due to
overheating.
Figure 6. Optional Engine Mounted Throttle and
Choke Controls (CH18-25).
2. Start the engine by activating the key switch.
Release the switch as soon as the engine starts.
NOTE: Do not crank the engine continuously for
more than 10 seconds at a time. If the
engine does not start, allow a 60 second
cool down period between starting
attempts. Failure to follow these
guidelines can burn out, or permanently
damage, the starter motor.
NOTE: Upon start up, a metallic ticking may
occur. This is caused by the hydraulic
lifter leakdown during storage. Run the
engine for 5 minutes. The noise will
normally cease in the first minute. If noise
continues, run the engine at mid-throttle
for 20 minutes. If noise persists, take the
engine to your local authorized Kohler
Engine Service Dealer.
If the engine develops sufficient speed to
disengage the starter but does not keep running (a
false start), the engine rotation must be allowed to
come to a complete stop before atttempting to
restart the engine. If the starter is engaged while
the flywheel is rotating, the starter pinion and
flywheel ring gear may clash resulting in damage to
the starter.
If the starter does not turn the engine over, shut off
starter immediately. Do not make further attempts
to start the engine until the condition is corrected.
Do not jump start using another battery (refer to
“Battery” on this page). See your Kohler Engine
Service Dealer for service assistance.
CH18-25 Engines Only:
3. For a Cold Engine – Gradually return the choke
control to the “off” position after the engine starts
and warms up.
The engine/equipment may be operated during the
warm up period, but it may be necessary to leave
the choke partially on until the engine warms up.
Choke
Control
Throttle
Control