Yamaha F75F - Checking the Spark Plug; Installing the Ignition Coil, Rectifier;Regulator, and Spark Plug

Rectifier/regulator, ignition coil, and spark plug
7-18
Checking the spark plug
1. Clean the electrodes “a” using a spark plug
cleaner.
2. Check:
• Spark plug
Electrodes are eroded, edges of elec-
trodes are rounded, insulator is damaged,
or
there is carbon or other deposits  Re-
place.
3. Measure:
• Spark plug gap “a”
Out of specification  Adjust or replace.
Installing the ignition coil, rectifi-
er/regulator, and spark plug
1. Install:
• Spark plug
2. Install:
• Grommet “1” (to the spark plug wire #4)
3. Install:
• Spark plug cap
• Ignition coil
• Ignition coil bolt
• Clamp
• Gasket
• Rectifier/regulator
4. Tighten:
• Rectifier/regulator bolt
a. Tighten the rectifier/regulator bolts “1”
in the order [1], [2], and so on.
Spark plug (NGK)
LKR6E-9N
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
Spark plug
25 N·m (2.5 kgf·m, 18 lb·ft)
a
a
T
R
.
.
Specified length
“a”: 285–295 mm (11.22–11.61
in)
“b”: 355–365 mm (13.98–14.37
in)
a
b
1
New
[3]
[4]
[5]
[6]
[1], [7]
[2]
1
1