Walker MDD (20.9 HP) Owner's Manual page 36

Operating Instructions
3. Move the throttle 1/4 to 1/2 open (toward
FAST) and turn the ignition switch to the
START position to start the engine. Release
the key to the RUN position as soon as the
engine starts.
IMPORTANT: If the engine fails to start after
approximately 10 seconds of cranking, the
engine should be checked before further crank-
ing. Turn the key to the OFF position and allow
a 60 second cool-down period between starting
attempts. Failure to follow these guidelines can
damage the starter motor and shorten battery
life.
TROUBLESHOOTING NOTE: If the engine
cranks but does not start, check the following:
The fuel valve solenoid is operating. Look at
the exhaust pipe when cranking the engine - no
smoke indicates no fuel is reaching the cylinder.
If the solenoid is not operating, refer to CHECK-
ING/SERVICING the Fuel Valve Solenoid in
Maintenance Instructions .
The glow plugs are operating. Look at the
exhaust pipe when cranking the engine - white
smoke indicates improper glow plug operation
and inadequate preheat. Consult the Kubota
Workshop Manual to check glow plug function.
4. After the engine starts, make sure the oil
pressure light goes off. If not, stop the engine
immediately and find the cause of the problem.
Make sure the oil pressure light is off prior to
engaging the mower blades and beginning
operation.
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