Walker MT owner manual Maintenance Instructions, Adjustments, Tilt-Up Deck Adjustable Stop

Maintenance Instructions ADJUSTMENTS

Tilt-Up Deck Adjustable Stop

When the carrier frame hinge joint is properly adjust- ed, the deck lock levers should move in and out of the engaged and disengaged positions freely. All four hitch pins used for height adjustment should sit flush on the washers above the deck pin bushing. On a level surface, if any pin is sticking up (likely the front pins), tighten the opposite side or loosen the existing side to lower the pin. Adjustments are made by loos- ening the jam nut and tightening or loosening the set screws on the Deck Mount Pivot Brackets. Retight- en the jam nut when the adjustment is complete.

Jam Nut

Set Screw

Tilt-Up Deck Adjustable Stop

Carburetor

CAUTION

DO NOT change the engine governor set- tings or overspeed the engine. The gov- ernor has been factory set for maximum safe engine operating speed.

The fixed main jet carburetor is designed to deliver the correct fuel-to-air mixture to the engine under all operating conditions. The high idle is set at the fac- tory and cannot be adjusted. The low idle mixture screw is also set at the factory and normally does not need adjustment. The only adjustment normally made to the carburetor is to set the idle speed. However, if the engine exhibits any of the following symptoms, it may be necessary to adjust or service the carburetor: black, sooty exhaust smoke; lack of power; engine miss or backfire; hard to start; rough running; stalls at low idle speed.

NOTE: Due to the technical requirements of mod- ern carburetors, refer to the Kohler Service Manual or contact an authorized Kohler engine dealer for carburetor adjustments and service not described in this section.

CAUTION

ALWAYS use the proper engine service manual when working on the engine. Un- authorized maintenance operations or modifications to the engine MAY result in unsafe operating conditions.

Since the carburetor main jet is non-adjustable, for operation above 5000 ft (1,524 m) above sea level, it may be necessary to change the carburetor main jet for best fuel economy and power. Contact an au- thorized Kohler dealer to change the carburetor main jet.

Engine Idle Adjustment

IMPORTANT: Some emission certified engines may not have an adjustable idle mixture needle valve; it is fixed from the factory and the adjustable screw is "capped". In this case, only the idle speed is adjustable and only Step 4 of the instructions be- low applies.

1.Gently close the idle mixture needle valve by turning it clockwise until it bottoms lightly.

IMPORTANT: The needle valve and carburetor seat may be damaged by turning the adjust- ment screw too tight.

80