Spark Plug - BOMBARDIER Johnson 90 Service Manual

PERIODIC MAINTENANCE
MAINTENANCE ANO TUNE-UP PROCEDURES
Spark Plug
• lnspect every 100 hours (6 months).
• Replace every 200 hours (12 months).
Standard spark plug: NGK DCPR6E
I
. A .
CAUTION
1
Only resistor (R) type spark plugs must be used with this
engine. Using a non-resistor spark plug will cause igni­
tion and fuel injection system malfunctions.
SPARK PLUG GAP
Using thickness gauge, measure for spark plug gap.
Adjust to within specified range if gap is out of specification.
Spark plug gap: 0.7 - 0.8 mm (0.028 - 0.031 in)
SI
Thickness gauge
CONDITION
OF
ELECTRODE
lnspect electrode for a worn or burnt condition. lf it is
extremely worn or burnt, replace the spark plug. Also, be
sure to replace spark plug if it has a broken insulator, dam­
aged thread, etc.
J.A.CAUTION
J
Confirm the thread size and reach when replacing the
plug. lf the reach is too short, carbon will be deposited
on the threaded portion of the plug hole and engine
damage may result.
~ Spark plug: 28 N-m (2.8 kg-m, 20.0 lb-ft)
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