3-34 ENGINE CONTROL SYSTEM
Battery
charge
coil
Rectifier &
regulator
30 A fuse
Battery
Remo-con box
OFF
ON
START
12 V power supply
ECM
Neutral switch
Neutral switch
Ignition switch
Starter motor
Starter motor relay
ECM main relay
Neutral
switch
Forward
position
Reverse
position
Neutral
position
Clutch control arm
START-IN-GEAR PROTECTION SYSTEM
A switch to detect neutral gear position is located on the cylinder block (starboard side) and operated by the
clutch control arm.
This ON/OFF type switch is “ON” in neutral and “OFF” in forward or reverse.
On starting the engine, the ECM detects the shift position using the neutral switch. When the neutral switch
is “OFF”, the ECM does not provide injector operating signal.
This neutral switch is also used to regulate the starter motor circuit. The engine will not start, even by emer-
gency rope, with the shift in the forward or reverse position.
SHIFT POSITION
NEUTRAL
SWITCH
OPERATION
Fuel injector Ignition Fuel pump Starter motor
Neutral
O N Ye s Ye s Ye s Ye s
Forward / Reverse
OFF No Yes Yes No
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