Toro Greensmaster
Flex 18 04018 Service Manual page 52

Spark Tester
Toro Part Number: TOR4036
For testing electronic ignitions. Saves time because you
will know if the ignition is causing the problem on a non–
starting engine. The tester determines if ignition spark
is present.
Figure 4
Electrical System Page 5 – 4 Greensmaster Flex 18/21