Honda GX240RT2 Service And Repair Manual page 251

gx240ut2_gx270ut2_gx340ut2_gx390ut2
FUEL SYSTEM
FUNCTION
When starting:
1. The thermally-linked wax (1) is expanded due to the ambient temperature, so the shaft (2) connected to the wax is moved.
2. The shaft connected to the wax pushes the choke control lever (3), which moves the choke shaft (4) to adjust the choke valve
(5) opening.
1.: 2.:
(4) (3)
(2)
(1)
(5)
After starting – Engine warming up:
The ECM turns the control motor (1) to adjust the throttle valve (2) opening with the middle gear (3) engaging to the control motor
and the throttle gear (4) linking to the throttle valve. At this time, the engine speed is maintained constantly at approximately
3,600 min (rpm) since the choke valve (5) opening is restricted with the choke control cam (6) on the middle gear.
-1
(3)
(6)
(4)
(1)
(5) (2)