PERIODIC MAINTENANCE 2-9
SPARK PLUG
Inspect every 30 hours of operation.
Replace every 60 hours of operation.
Remove the fuel tank. ( 4-2)
Disconnect the spark plug cap and remove the spark plug.
Cold type Standard Hot type
NGK
CR9E
CR8E CR7E
CR10E
DENSO
U27ESR-N
U24ESR-N U22ESR-N
U31ESR-N
CARBON DEPOSITS
Check to see if there are carbon deposits on the spark plug. If
carbon is deposited, remove it using a spark plug cleaner ma-
chine or carefully use a tool with a pointed end.
SPARK PLUG GAP
Measure the spark plug gap using a thickness gauge. If the spark
plug gap is out of specification, adjust the gap.
Spark plug gap
Standard: 0.7 – 0.8 mm (0.028 – 0.031 in)
09900-20803: Thickness gauge
ELECTRODE
Check the condition of the electrode.
If the electrode is extremely worn or burnt, replace the spark
plug with a new one.
Also, replace the spark plug if it has a broken insulator, dam-
aged threads, etc.
Check the thread size and reach when replacing the
spark plug. If the reach is too short, carbon will be de-
posited on the screw portion of the spark plug hole
and engine damage may result.
SPARK PLUG INSTALLATION
To avoid damaging the cylinder head threads; first, fin-
ger tighten the spark plug, and then tighten it to the
specified torque using the spark plug wrench.
Insert the spark plug and finger tighten it to the cylinder head,
and then tighten it to the specified torque.
Spark plug: 11 N·m (1.1 kgf-m, 8.0 lb-ft)
To Next Page
Loading...
Need help?
General
