Idle Speed; Ignition Timing - Toro Workman 3000 Series Service Manual

Idle Speed

1. Make sure engine is warm (coolant temperature 80 –
95�C (176 – 203�F), all lights and accessories are OFF
and transmission is in NEUTRAL.
2. If vehicle is not equipped with a tachometer, connect
an electronic tachometer:
A. Insert a paper clip into ignition coil primary 3–pin
connector (terminal 1) from harness side.
B. Connect tachometer to paper clip.
3. Check idle speed.
Idle speed
4. If idle speed is not at the standard value, use the
speed adjusting screw (SAS) to adjust idle speed to the
standard value.

Ignition Timing

1. Make sure engine is warm (coolant temperature 80 –
95�C (176 – 203�F), all lights and accessories are OFF
and transmission is in NEUTRAL.
2. Install a timing light.
3. Check idle speed to make sure it is at standard value
(see Idle Speed in this section).
Idle speed
4. Check ignition timing.
Ignition timing
5. If timing is not within standard value, loosen distribu­
tor mounting nut and adjust by rotating distributor body.
NOTE: Turning distributor body left retards timing and
turning it right advances timing.
Liquid Cooled Gas Engine
1200 + 100 RPM
1200 + 100 RPM
6� BTDC + 2�
Page 3 – 20
Figure 26
SAS
Figure 27
Figure 28
6. Tighten distributor mounting nut to 10 – 13 Nm (7 – 9
ft–lb).
Simplified Inspection
NOTE: Simple inspection of ignition timing can be done
by using the TOP and 10� marks on the front case.
Rev. B
CONNECTOR
END VIEW
TOP
10 �
Workman 3000/4000 Series