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 />
Tilt-Up Deck Adjustable Stop<br />
When the carrier frame hinge joint is properly adjusted,<br />
the deck lock levers should move in and out of the<br />
engaged and disengaged positions freely. All four<br />
hitch pins used for height adjustment should sit flush<br />
on the washers above the deck pin bushing. On a<br />
level surface, if any pin is sticking up (likely the front<br />
pins), tighten the opposite side or loosen the existing<br />
side to lower the pin. Adjustments are made by loosening<br />
the jam nut and tightening or loosening the set<br />
screws on the Deck Mount Pivot Brackets. Retighten<br />
the jam nut when the adjustment is complete.<br />
Jam Nut<br />
Set Screw<br />
The fixed main jet carburetor is designed to deliver<br />
the correct fuel-to-air mixture to the engine under all<br />
operating conditions. The high idle is set at the factory<br />
and cannot be adjusted. The low idle mixture<br />
screw is also set at the factory and normally does<br />
not need adjustment. The only adjustment normally<br />
made to the carburetor is to set the idle speed.<br />
However, if the engine exhibits any of the following<br />
symptoms, it may be necessary to adjust or service<br />
the carburetor: black, sooty exhaust smoke; lack of<br />
power; engine miss or backfire; hard to start; rough<br />
running; stalls at low idle speed.<br />
NOTE: Due to the technical requirements of modern<br />
carburetors, refer to the Kohler Service Manual<br />
or contact an authorized Kohler engine dealer for<br />
carburetor adjustments and service not described in<br />
this section.<br />
CAUTION<br />
ALWAYS use the proper engine service<br />
manual when working on the engine. Unauthorized<br />
maintenance operations or<br />
modifications to the engine MAY result in<br />
unsafe operating conditions.<br />
Carburetor<br />
Tilt-Up Deck Adjustable Stop<br />
CAUTION<br />
DO NOT change the engine governor settings<br />
or overspeed the engine. The governor<br />
has been factory set for maximum<br />
safe engine operating speed.<br />
Since the carburetor main jet is non-adjustable, for<br />
operation above 5000 ft (1,524 m) above sea level,<br />
it may be necessary to change the carburetor main<br />
jet for best fuel economy and power. Contact an authorized<br />
Kohler dealer to change the carburetor<br />
main jet.<br />
Engine Idle Adjustment<br />
IMPORTANT: Some emission certified engines<br />
may not have an adjustable idle mixture needle<br />
valve; it is fixed from the factory and the adjustable<br />
screw is "capped". In this case, only the idle speed<br />
is adjustable and only Step 4 of the instructions below<br />
applies.<br />
1. Gently close the idle mixture needle valve by<br />
turning it clockwise until it bottoms lightly.<br />
IMPORTANT: The needle valve and carburetor<br />
seat may be damaged by turning the adjustment<br />
screw too tight.<br />
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