1998 S/N 21329 - Walker Mowers
1998 S/N 21329 - Walker Mowers
1998 S/N 21329 - Walker Mowers
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Maintenance Instructions<br />
ADJUSTMENTS<br />
2. Preliminary Setting: Turn the idle mixture needle<br />
valve out (counterclockwise) 1-1/2 turns<br />
from the closed position. This initial adjustment<br />
will allow the engine to be started and<br />
warmed up prior to the final adjustment.<br />
Low Idle Mixture<br />
Needle Valve<br />
(May be Non-Adjustable)<br />
GHS “Full” Signal Horn with Grass-Pak ® Switch<br />
If the GHS “full” signal horn is not sounding or is not<br />
adjusted to sound when the catcher is full, the following<br />
troubleshooting and adjustment instructions<br />
apply:<br />
Troubleshooting (When Horn Fails to Operate)<br />
1. Check the horn.<br />
Idle Speed<br />
Screw<br />
Fixed Main Jet Under<br />
Shutdown Solenoid<br />
Carburetor Adjustment<br />
a. Disconnect the two wires from the Grass-<br />
Pak ® switch electric connector plug and<br />
make a jumper wire connection between<br />
these wires (bypassing switch).<br />
b. Turn the ignition switch ON and move the<br />
blade clutch to the ENGAGED position<br />
(engine not running) to make the horn<br />
sound.<br />
c. If the horn does not sound, the horn is bad<br />
and needs to be replaced.<br />
d. If the horn does sound, proceed to step 2.<br />
DANGER<br />
The engine must be running to adjust the<br />
carburetor for engine idle. To guard<br />
against injury, keep hands, feet, face, and<br />
other parts of body away from the muffler/<br />
exhaust pipe, other hot parts of the engine,<br />
and moving or rotating parts of the engine.<br />
3. Start the engine and allow it to warm up by running<br />
at 1/2 throttle for approximately five (5)<br />
minutes. The engine must be warm before<br />
making final settings.<br />
4. Move the throttle to the idle position. Adjust idle<br />
speed for 1200 rpm (± 75 rpm) by adjusting the<br />
idle speed screw. Check the idle speed using a<br />
tachometer.<br />
5. With the engine idling, adjust the idle mixture by<br />
turning the idle mixture needle valve in (slowly)<br />
from the preliminary setting until engine speed<br />
decreases and then back out approximately 3/4<br />
to 1 turn to obtain the best low speed performance.<br />
6. Recheck idle speed after the final idle mixture<br />
adjustment.<br />
2. Check the Grass-Pak ® switch.<br />
a. Reconnect the wires to the Grass-Pak ®<br />
switch electric connector plug.<br />
b. Turn the ignition switch ON and move the<br />
blade clutch to the ENGAGED position<br />
(engine not running).<br />
c. Open the catcher back door and trigger the<br />
Grass-Pak ® vane by hand as it oscillates.<br />
WARNING<br />
PINCH POINT - SPRING LOADED DOOR<br />
When lowering the door on the GHS catcher,<br />
depress the safety latch on the side of<br />
the catcher as the door closes. The springs<br />
that hold the door closed during operation<br />
are very powerful, and the door CAN slam<br />
shut with considerable force.<br />
d. The horn should sound as the switch is<br />
moved in both directions. If the horn does<br />
not sound, the switch is bad and needs to<br />
be replaced.<br />
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