Centrifugal Timing Control Device - Toro Workman 3000 Series Service Manual

Centrifugal Timing Control Device

1. Start engine and run at idle.
2. Remove vacuum hose from vacuum controller. Plug
disconnected vacuum hose. Plug disconnected vacuum
hose.
3. Increase engine speed gradually and check advance.
It is normal if advancing smoothly according to increas­
ing speed.
Symptom
Excessive advance
Start up advance too sudden
Inadequate advance or slow
change in advance.
Liquid Cooled Gas Engine
Possible cause
Worn or damaged governor
spring
Damaged spring
Malfunction of governor weight
or cam
Page 3 – 34
Figure 48
<Reference> Centrifugal characteristics
20
15
10
5
0
1,000 2,000
500 1,500
Distributor rotation speed (rpm)
Figure 49
Workman 3000/4000 Series
3,500
2,500 3,000