Fuel Stop Control Unit - Toro Groundsmaster 300 Series Service Manual

Fuel Stop Control Unit

(Fig. 17)
(Groundsmaster 322-D/325-D only)
The control unit (Fig. 17, Item 27) is a solid-state timing
device that controls a fuel stop solenoid for shutting the
engine off with the ignition key switch.
To check operation of the control unit and fuel stop
solenoid, listen for an audible "click" when the key is
turned to the OFF position (after having been in the RUN
position), and then once again approximately 7 to 15
seconds after the key switch has been turned off. The
"clicking" should is made by the solenoid (on back of
injection pump). These sounds signify that the system
is functioning properly electrically.
Detailed testing of the control unit, alone, is provided in
the chart that follows. These tests must be performed
with the control unit installed in the machine and con-
nected to the electrical system.
Figure 17
IMPORTANT: Testing the control unit by any other
method, especially when using a battery powered
meter or tester, may cause damage to the solid state
circuitry in the control unit.
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Testing Page 6 - 24 Groundsmaster 300 Series