Operating Instructions
33
STARTING THE ENGINE
CAUTION
Before operating the mower, read and un-
derstand all
Safety Instructions
and
Operat-
ing Instructions
.
WARNING
NEVER run the engine in an enclosed or
poorly ventilated area. Engine exhaust
contains carbon monoxide, an odorless
and deadly gas.
1. Before attempting to start the engine, make sure
the operator is in the seat, the Forward Speed
Control is in
NEUTRAL-PARK
position, and the
blade clutch and parking brake are
DISEN-
GAGED.
NOTE:
Release parking brake to prevent extra
load on the starter if the transmission neutral is
slightly out of adjustment.
CAUTION
A safety interlock switch system PRE-
VENTS CRANKING the engine with either
the Forward Speed Control or the blade
clutch (PTO) out of neutral. If the engine
cranks otherwise, the safety system is not
working and should be repaired or adjust-
ed before operating the mower. DO NOT
disconnect safety switches; they are for
the operator’s protection.
2. Turn and hold the ignition key in the
PREHEAT
position to preheat the engine glow plugs. For
temperatures below 35° F (2° C), the time re-
quired is approximately 10 to 15 seconds. For
temperatures 35° F (2° C) or higher, the time re-
quired is approximately 5 to 10 seconds.
3. Move the throttle 1/4 to 1/2 open (toward
FAST
).
Turn the ignition switch to the
START
position to
start the engine. Release the key to
RUN
posi-
tion as soon as the engine starts.
IMPORTANT:
DO NOT
crank the engine con-
tinuously for more than 10 seconds at a time. If
the engine does not start, turn the key to the
OFF
position and allow a 60 second cool-down period
between starting attempts. Failure to fol low
these guidelines can damage the starter motor
and shorten battery life. Contact your Walker
dealer or authorized Yanmar dealer for addition-
al help.
TROUBLESHOOTING NOTE:
If the engine
cranks but does not start, check the following:
•
Engine is equipped with a mechanical fuel
pump and the fuel system will need to be primed
in certain conditions (after running out of fuel or
after fuel system maintenance). Move priming
lever on fuel pump until the clear cup on the fuel
filter/water separator shows filled with fuel before
attempting to crank the engine.
•
Is the fuel valve solenoid 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, contact your
Walker dealer.
•
Are the glow plugs operating? Look at the
exhaust pipe when cranking the engine - white
smoke indicates improper glow plug operation
and inadequate preheat. Consult the Yanmar
Manual to check glow plug function.
4. After the engine starts, make sure the oil pres-
sure light goes off. If not, stop the engine imme-
diately and find the cause of the problem. Make
sure the oil pressure light is off prior to engaging
the mower blades and beginning operation.
ADJUSTING GROUND SPEED AND STEERING
CAUTION
Learn to START, STOP, and MANEUVER
the mower in a large, open area.
If the operator has not operated a machine
with LEVER STEERING OR DUAL TRAN-
SAXLES, steering and ground operation
should be learned and practiced until the
operator is completely comfortable han-
dling the machine BEFORE ATTEMPTING
TO MOW.
