Toro Workman 3000 Series Service Manual page 116

5. Use light pressure with a finger to fully close choke
valve. Measure clearance between choke valve and
choke bore when throttle valve is fully opened.
Choke valve to choke bore clearance
If clearance is out of specification, adjust by moving
choke shaft end.
Choke shaft end Valve clearance
Lower Larger
Raise Smaller
6. Use a hand vacuum pump to check that there are no
clogs in port lines. If a port line is clogged, disassemble,
clean and reassemble.
Liquid Cooled Gas Engine
1.45 mm (0.57 mm)
Remarks
Engine becomes more
difficult to start and
tends to stall
Carbon tends to
accumulate on spark
plugs
Page 3 – 78
Figure 153
Choke shaft end
Figure 154
Figure 155
Workman 3000/4000 Series