Kohler Command Pro CV980 User Manual download pdf (Page 31)

5.3

Section 5

Fuel System and Governor

Self-Relieving

Choke

Fuel Shut-Off

Solenoid

Bowl Drain Screw

Slow Jets

Bowl Vent

Low Idle Fuel

Adjustments

(With Limiters)

Fuel Pump

General

These engines use either a pulse style fuel pump,

or optional remote-mounted electric fuel pump

¢ǯȱȱȱśȬŗȱȱśȬŘǯȱȱȱȱ

of pulse style pumps is created by the oscillation of

positive and negative pressures within the crankcase.

ȱȱȱĴȱȱȱȱȱ

through the rubber hose connected between the

pump and crankcase. The pumping action causes the

diaphragm on the inside of the pump to pull fuel in on

its downward stroke and to push it into the carburetor

on its upward stroke. Two check valves prevent fuel

from going backward through the pump.

Figure 5-1. Pulse Style Fuel Pump.

Figure 5-2. Optional Electric Fuel Pump.

Fuel Pump - Replacement

Replacing the Pulse Style Fuel Pump

Replacement pumps are available through your

source of supply. To replace the pulse pump follow

these steps. Note orientation of pump before

ǯȱȱȱśȬŗǯ

Figure 5-3. Keihin 2-Barrel Carburetor.

WARNING: Explosive Fuel

ȱȱ¡¢ȱĚȱȱȱȱȱ¡ȱ

ȱǯȱȱȱ¢ȱȱȱǰȱȱ

ȱǰȱȱǰȱ¢ȱȱȱȱ

Ěǯȱȱȱęȱȱȱȱȱȱȱȱȱȱ

ǰȱȱȱȱȱȱȱȱȱȱȱ

ȱȱȱȱȱȱǯȱȱȱȱȱ

ȱȱȱǯȱȱȱȱȱȱȱ

ǯ

1. Disconnect the fuel lines from the inlet, outlet

ȱȱęĴȱȱȱǯ

ȱ Řǯȱ ȱȱȱȱȱȱȱěȱ

the pump.

3. Connect the pulse line to the new fuel pump and

make sure opposite end is properly connected to

ȱęȱȱęĴǯ

Ǳȱ ȱȱȱȱȱȱȱ

pump is consistent with the removed

pump. Internal damage may occur if

installed incorrectly.

Śǯȱ Ĵȱȱȱȱȱȱȱ¡ȱĚȱ

screws.Torque the screws to 2.3 N·m (20 in. lb.).

5. Reconnect the fuel lines to the inlet and outlet

ęĴȱȱȱȱȱǯ

Carburetor

General

ȱȱȱȱȱȱȱȱȱ

ȱȬǰȱȬĞȱȱȱę¡ȱȱ

jets on a matching intake manifold. The carburetor

features a self-relieving choke, serviceable slow

jets, main jets and a fuel shutdown solenoid. See

ȱśȬřǯȱ

Pulse

Fuel Pump

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Kohler Command Pro CV980 User Manual Page 31

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