Electrical System - wsm wg972-e4 Workshop Manual

WG972-E4, WSM

(6) Electrical System

Spark Plug Gap
1. Measure the spark plug gap with a feeler gauge, and repair or
replace the spark plug if the measured gap differs from the
factory specification.
2. Replace the spark plug if the electrode or the insulator is
deformed or cracked.
3. Tighten the spark plug with a plug wrench.
IMPORTANT
• If the spark plug electrode or its insulator is soiled or is
covered with deposited carbon, it may cause engine
trouble.
(When reassembling)
• Put the high tension cord cap inside the spark plug terminal
firmly.
• Make sure that the cylinder number is corresponding to the high
tension cord number.
• Wrong connection causes high temperature on catalytic
muffler/converter.
Spark plug gap Factory specification
Spark plug
Tightening torque Spark plug
Check Ignition Coil
Ignition coil has three pins at connector, so you cannot check
this type of ignition coil by itself.
Check for ignition system as sparking test.
Battery Voltage
1. Stop the engine.
2. Measure the voltage with a circuit tester between the battery
terminals.
3. If the battery voltage is less than the factory specification, check
the battery specific gravity and recharge the battery.
Battery voltage Factory specification
(1) Positive Terminal
1-S21
ENGINE
0.70 to 0.80 mm
0.029 to 0.032 in.
NGK BKR6E
24.5 to 29.4 N·m
2.50 to 2.99 kgf·m
18.1 to 21.6 lbf·ft
9Y1211108ENS0116US0
9Y1211108ENS0024US0
More than 12 V
(2) Negative Terminal
9Y1211108ENS0025US0
KiSC issued 07, 2015 A