Greensmaster 1000/1600
Page 5 – 10
Electrical System
Ignition System Operation
Making a System Tester
This simple tester can be made if a commercial spark
tester is not available. It can determine if the ignition sys-
tem is operating properly.
1. Use a new NGK BPR5ES or equivalent spark plug.
2. Remove the ground electrode from the test plug.
This gives the spark plug a larger gap, which simulates
the spark required under actual engine conditions.
3. Use 18 gauge insulated wire, an alligator clip, and
large spring clip to make a lead assembly.
4. Slide a 1–1/4 inch length of 1/2–inch I.D. clear fuel
line over the threads of the spark plug. The spark will be
more visible, and the fuel line will shade the plug firing
tip.
Testing the Ignition System
The ignition system produces a danger-
ously high voltage. Do not touch the
spark plug, ignition coil, or spark plug
lead while the engine is running; you can
receive a severe electrical shock.
WARNING
Note: Do not remove spark plug from the engine. The
spark plug is necessary to maintain normal starting
speeds.
1. Remove high–tension lead from the spark plug, and
connect it to the test spark plug.
2. Connect large spring clip around the hex portion of
the test spark plug. Connect alligator clip to a good
ground on the engine block.
3. Make sure ON/OFF switch is in the ON position.
Figure 4
SPRING CLIP
SPARK
PLUG
ALLIGATOR
CLIP
18 GUAGE
WIRE
4. Start the engine and observe the test spark plug.
Visible and audible sparks should be produced.
5. If visible and audible sparks are produced, the igni-
tion system is operating properly.
6. If visible and audible sparks are not produced, the
ignition system is not operating properly.
A. Check wires and connectors of the ON/OFF
switch, igniter, ignition coil, and combination igniter
and ignition coil (on later models) for grounding or
damaged insulation.
B. If wires and connectors are good, test the igniter,
ignition coil, and combination igniter and ignition coil
(on later models) individually.
C. If the igniter, ignition coil, and combination igniter
and ignition coil (on later models) test properly see
Interlock Module and Clutch (Interlock) Switch in
this section for further testing.
