Spark Plug; Spark Plug Cap; Ignition Coil - Yamaha SXV70SJ Supplementary Service Manual

SCH8240
IGNITION SYSTEM

SPARK PLUG

1. Remove:
•
Spark plugs
2. Measure:
•
Spark plug gap
Standard spark plug:
BR9ES (NGK)
Spark plug gap:
SCH8220

SPARK PLUG CAP

1. Remove:
•
Spark plug cap
2. Connect:
•
Pocket tester
(to the spark plug cap)
3. Measure:
•
Spark plug cap resistance
Out of specification → Replace.
Spark plug cap resistance:
SCH8230

IGNITION COIL

1. Disconnect:
•
Ignition coil lead
•
Spark plug lead
2. Connect:
•
Pocket tester
(to the ignition coil and spark plug lead)
3. Measure:
•
Primary coil resistance a
•
Secondary coil resistance b
Out of specification → Replace.
Primary coil resistance a:
Secondary coil resistance b:
SCH8250
8-7
ELEC
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
Ω
5 k at 20˚C (68˚F)
Ω
0.36 ~ 0.48 at 20˚C (68˚F)
Ω
5.4 ~ 7.4 k at 20˚C (68˚F)
– +