Maintenance Instructions

ADJUSTMENTS

Carburetor

CAUTION

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

Carburetor adjustments are required to compensate for differences in altitude, temperature, and fuel. Once the carburetor has been set, no further adjustments should be required. However, if the engine exhibits any of the following symptoms, the carburetor adjustment should be checked: black, sooty exhaust smoke, lack of power, engine miss or backfire, hard to start, rough running or idle.

NOTE: Also refer to the Kawasaki Service Manual for detailed carburetor adjustment information.

CAUTION

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

NOTE: The air cleaner and air intake hose must be connected to the carburetor when adjusting the car- buretion.

The carburetor main jet is fixed (non-adjustable). For operation above 5,000 ft (1,524 m) above sea level, the carburetor main jet should be changed for best fuel economy and power. Contact an authorized Ka- wasaki engine dealer to change the carburetor main jet.

To adjust the carburetor for engine idle, use the following procedure:

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 adjustment screw too tight.

Idle Mixture

Needle Valve

Idle Speed

Screw

Carburetor Adjustment

2.Preliminary Setting: Turn the idle mixture needle valve out (counterclockwise) 2 turns from the closed position. This initial adjustment will al- low the engine to be started and warmed up prior to the final adjustment.

DANGER

The engine must be running to adjust the carburetor for engine idle. To guard against injury, keep hands, feet, face, and other parts of body away from the muffler/ exhaust pipe, other hot parts of the engine, and moving or rotating parts of the engine.

3.Start the engine and allow it to warm up for ap- proximately five (5) minutes.

4.Move throttle to the IDLE position. Adjust idle speed for 1300 RPM by adjusting the idle speed screw. Check the idle speed using a tachometer.

5.With the engine idling, adjust the idle mixture by turning the needle valve until the engine slows (clockwise - lean mixture). Then turn the needle valve out past the smooth operating point until the engine slows again (counterclockwise - rich mixture). Now turn the needle valve to the mid- point between rich and lean mixture. Check en- gine acceleration from the idle. If the engine will not accelerate properly, readjust the idle mixture, usually to a slightly richer mixture (open the valve).

69