Removing The Rectifier Regulator; Removing The Ignition Coil; Checking The Spark Plug - Yamaha F150A Service Manual

Removing the Rectifier Regulator

1. Disconnect the Rectifier Regulator cou-
pler "a", and then remove the ground
lead "1".
1
2. Remove the Rectifier Regulator "1".
1

Removing the ignition coil

1. Remove the spark plug wires "1", "2", "3",
and "4".
2. Disconnect the ignition coil couplers "a",
and then remove the wiring harness "1"
from the holders "2".
a
1
2
3
4
7-25
Rectifier Regulator and ignition coil
3. Remove the ignition coils "3".
1
2

Checking the spark plug

1. Clean the electrodes "a" using a spark
plug cleaner.
a
2. Check the spark plug. Replace if the
electrodes are eroded, or there is carbon
or other deposits.
3. Check the spark plug gap "a". Replace if
out of specification.
Specified spark plug: LFR5A-11 (NGK)
Spark plug gap "a":
1.0–1.1 mm (0.039–0.043 in)
a
3
a
3
a
0
1
2
3
4
5
6
7
8
9
10
A