Suzuki DF350A - Page 87

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5. Loosen and remove the spark plug using the
box wrench 2 and driver 3 in the tool bag.
Your outboard motor comes equipped with the
following “standard” spark plug for normal
usage.
Standard spark plug NGK ILZKR7D8
NOTICE
Non-resistor types of spark plugs will
interfere with the function of the elec-
tronic ignition, causing misfiring, or
causing problems with other electronic
boat equipment and accessories.
Use ONLY resistor type spark plugs in
your outboard motor.
Inspect the spark plug for electrode wear, car-
bon deposits or insulator damage. If the elec-
trode has excessive wear, carbon deposits or
insulator damage, then the spark plug should
be replaced.
Measure the plug gap using a wire type spark
plug gauge. If the plug gap value is out of the
service limit, replace the spark plug with a new
one.
Spark plug gap
NOTICE
If a spark plug gauge other than the wire
type is used, the electrode might be dam-
aged.
Make sure to use a wire type spark plug
gauge.
Standard
0.7 – 0.8 mm
(0.028 – 0.031 in.)
Service limit 1.0 mm (0.039 in.)
Gap
Center
electrode
Insulator