Power Unit; Inspection Of Spark Plugs - TOHATSU MD 70-90C2 Service Manual

Maintenance

5. Power Unit

1) Inspection of Spark Plugs

1. Remove plug caps and then spark plugs.
Clean spark plug electrodes 1 by using spark plug
2.
cleaner. Replace if necessary.
Check electrodes 1 for corrosion or excessive build up of
3.
carbon, and washer 2 for damage. Replace if necessary.
Check spark plug gap a. Replace if it is over specified
4.
value. Adjust gap if it is out of specified range.
Spark Plug Gap a:Standard Value
0.7 - 0.8 mm (0.029 - 0.032 in)
Functional Limit:
0.9 mm (0.036 in)
Specified Spark Plug:
IZFR6Q [NGK]
Install spark plug, fully hand-tighten a, and then use plug
5.
wrench to tighten to specified torque b.
Spark Plug:
25 N · m (18 lb · ft) [2.5 kgf · m]
3-10
2
a
b
1
2
a
TLDI 75/90C2 2010