Kohler SV810-840 Service Manual page 35

Fuel Pump
General
pumping action is created by the oscillation of positive
and negative pressures within the crankcase. This
a 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.
Outlet Line
(to Carburetor)
Pulse Line
Figure 5-1. Pulse Pump Connections.
Performance
Replacing the Fuel Pump
Replacement pumps are available through your
source of supply. To replace the pulse pump follow
these steps. Note the orientation of the pump before
removing.
1. Disconnect the fuel lines from the inlet, outlet
Inlet Line
Carburetor
General
a self-relieving choke. These carburetors include three
main circuits, which function as follows.
Float Circuit: The fuel level in the bowl is maintained
fuel pressure will push the inlet needle away from
the seat, allowing more fuel to enter the bowl. When
Fuel System and Governor
the pump.
make sure opposite end is properly connected
into valve cover.
pump is consistent with the removed
pump. Internal damage may occur if
installed incorrectly.
screws. Torque the screws to 2.3 N·m (20 in. lb.).
Section 5
5
5.3