TOHATSU 40 Service Manual page 195

SECTION 7
• 4 cylinder models - Four ignition coils are provided, one per
cylinder.
Main Key Switch and Emergency Stop Switch
The main key switch and emergency stop switch are connected to
the CD Unit through an engine wiring harness. When the main key
switch is in the OFF position, or the lanyard is removed from the
emergency start switch, an input to the CD Unit is grounded. This
deactivates the CD Unit and the engine shuts down.
Starting System
6 7 8 9 10
start switch (2), starter solenoid (3), starter motor (4) and 20 A
engine fuse (5). When the main key switch is in the START position,
and the start contacts of the neutral start switch are closed, power
is sent to the starter solenoid, energizing it. When the starter
solenoid is energized, a connection between the positive terminal
of the battery and the starter motor is provided. The connection
between the starter motor and ground completes the circuit. The
fuse opens if the coil circuit of the starter solenoid shorts or
overloads.
7-16
T1458
The starting system consists of the
battery, main key switch (1), neutral
T1459
T1460
T1461
T1462
3-/ 4-Cylinder