[Point
31
lnspect the fuel ejection status of the acceleration pump jet
Remove the intake air connector from the top of the carburetor.
Inspect the ejection of fuel from the pump jet when the throttle valve
is operated.
[Point
41
lnspect the air governor
If the ribbon spring or coil spring of the governor is broken, the
governor valve will stay fully closed and the engine will be unable
0
to start.
ENGINE IS ROUGH, OR STOPS, DURING IDLING
Engine is rough during idling
[Point
I]
Phenomenon
2.
PCV valve
Main places for inspection and adjustment
1.
Carburetor
13. Resistive cord
I
14. Distributor
I
5. Ignition timing
6.
Tappet clearance
7.
Valve contact
18.
Plug
I
[Point
I]
lnspect non-combusting cylinders
Hold the bottom of the resistive cord and pull it off from the plug.
Work through each cylinder, disconnecting the cord end from the
spark plug terminal and stopping the spark. lnspect for the
presence of combustion by checking:
The change in engine speed
Change in combustion sound, or change in vibration
Roughness during idle-up
1.
Idle-up actuator
2.
VTV
3. Vacuum hose
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