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Kawasaki FH601V Carburetor

Kawasaki FH601V Engine - Fuel and Air Flow

The main system of the carburetor consists of the main jet A, Valve seat B main nozzle C, and the main air passage D (main air jet E). The main system meters fuel to the engine during moderate to heavy load conditions.

Fuel flows through the main jet and into the main nozzle, where it is joined by air from the main air passage (main air jet). The resulting mixture flows out the end of the main nozzle into the carburetor bore, where it is atomized by the high speed air flow, and carried into the engine.

Fuel Shut Off Solenoid Valve (Electric Starter Model)

To avoid after firing when stopping the engine, a solenoid actuated fuel shut off solenoid valve A is installed in the carburetor bowl. The valve shuts off the fuel supply to the valve seat B simultaneously when the switch key turned to the OFF position. The valve opens automatically when the switch key is turned to the Run position.

Kawasaki FH601V Carburetor Adjustment

Low Idle Speed Adjustment

Disconnect all possible external loads from the engine. Start the engine and warm it up thoroughly. Adjust the low idle speed screw with Phillips Screwedriver until the engine idles at specified speed. Idle Speed - 1450 rpm. Release the throttle lever and adjust the low idle speed set screw on the control plate to obtain the specified governed low idle speed. Low Idle Speed - 1550 rpm.

High Idle Speed Adjustment

High idle speed adjustment should be made after the idle speed adjustment is performed. Do not adjust high idle speed with the air cleaner removed. Start and warm up the engine thoroughly. Move the throttle lever at a dash to the high idle position and match the lever hole position with the panel hole by inserting 6 mm dia., pin or bolt.

Loosen two M6 control panel mounting bolts enough to move the control panel assembly. Carefully move the control panel assembly right side up or down to obtain the specified high idle speed. High Idle Speed 3600 rpm. Tighten the M6 Mounting bolts. Torque - Control Panel Mounting Bolts: 5.9 Nm (52 in-lb). Remove the 6 mm dia., pin or bolt. Check the idle speed, and readjust the idle speed if necessary.

High Altitude Operation

At high altitude, the standard carburetor air-fuel mixture will be excessively rich. Performance will decrease, and fuel consumption will increase. High altitude performance can be improved by installing a smaller diameter main-jet in the carburetor and correct idle speed. The main jet high altitude kits are available if the equipment is to be used in the high altitudes. The main jet numbers are stamped on ends of the main jets.

High Altitude Main Jet

Altitude 0-1000 m (0-3000 ft): Main Jet L: #136, R: #140
Altitude 1000-2000 m (3000-6000 ft): Main Jet L: #133, R: #139
Altitude 2000 m (6000 ft): Main Jet L: #130, R: #134

Kawasaki FH601V Carburetor Removal

Remove: air cleaner and related parts. Turn the fuel shut off valve to the OFF position. Drain the carburetor. Disconnect the fuel tube at the fuel inlet joint A of the carburetor. Disconnect the solenoid valve lead terminal and remove the earth terminal (Electric Starter Model).

Unhook the throttle link spring B at the throttle shaft lever C top end with a long nose plier. Unhook the throttle link spring B at the link clip F with a long nose plier. Unhook the link clip F and remove the throttle D and choke link rods E at the ends of their arms while pull off the carburetor.

Main Jet Replacement

Remove the carburetor. Unscrew the main jet plugs and take off the main jet plugs and gaskets. Using a proper blade screw driver, carefully replace the main jet with a new one for altitude expected. Tighten the main jet to the specification. Install the gasket and the main jet plug. Torque - Main Jet Plug: 19 Nm (14 ft-lb).

Kawasaki FH601V Carburetor Installation

Clean the mating surfaces of the carburetor and intake manifold, and fit the new gaskets. Take care not to bend the throttle and choke link rods during installation.

Make sure the link spring around the throttle link rod is inplace and that it pulls the governor arm and carburetor throttle shaft lever toward each other. Be sure the fuel tube clip ends face horizontal direction. Adjust: Carburetor Pilot Screw, Idle Speed

Kawasaki FH601V Carburetor Inspection

Inspect the carburetor body for damage. Flange sealing surfaces should be smooth and free of burns and nicks. Replace the gasket if necessary. Turn the throttle and choke shafts to check that the throttle and choke butterfly valves move smoothly.

If the valves do not move smoothly, replace the carburetor body and/or throttle shaft and choke shaft assembly. Check the gasket on the carburetor body. If the gasket is not in good condition, replace it. Check the other parts of the carburetor for wear or damage. Replace the part if necessary. Clean and check the float level as follows.

With the float A assembly installed onto the carburetor body B, hold the carburetor upside down at eye level. Gently support the float with a finger and bring it down slowly so that the float arm tab C just touches the float valve D. The float lower surface E should be parallel with the carburetor body mating surfaces F.

If the float position is not correct, replace the float with a new one. Inspect the float valve for excessive wear or damage. The tip should be smooth, without any grooves, scratches, or tears. The rod at the other end of the needle should move smoothly when push in and released.

If either the needle or the seat is worn or damaged, replace the float assembly and carburetor body as a set. Inspect the tapered portion of the pilot screw for wear or damage. If the pilot screw is worn or damaged on the taper portion, replace it. Check the spring for weakened condition, replace it, if necessary.