TOHATSU 40 Service Manual page 204

Test 1 - Spark Test
Make sure all electrical terminals are connected
during this test except those that are noted in the
test procedure.
Check for continuity between chassis ground and
the ground connection for the magneto plate, CD
Unit, and ignition coils before conducting the
following procedure.
1. Remove all spark plug caps.
2. Adjust spark gap tester (1) to 7/16 in [11 mm].
2
3. Connect each spark plug cap (2) to spark gap tester (1).
4. Secure spark gap tester to a clean ground on engine block.
To avoid possible shock hazard, do not handle
ignition coils or spark gap tester during cranking
tests.
To prevent possible arcing of high voltage, route
tester leads at least 2 in [51 mm] from any metal
surface.
Ground unused test leads to a clean engine ground.
5. Attach lanyard to emergency stop switch.
6. Crank engine.
A spark should jump across the gap for each cylinder and alternate
from one gap to another.
7. Reconnect all wires disconnected during test.
8. Return to Ignition System Performance Testing Flow Chart.
3-/ 4-Cylinder
NOTE
WARNING
NOTE
ELECTRICAL SYSTEM
T1474
7-25