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ITEM 63078
SAFETY
Op
ERA
TION
M
AINTENANCE
SETU
p
Spark plug Maintenance
1.
Spark
plug
Cap
Disconnect spark plug caps from ends of plugs.
Clean out debris from around spark plugs.
2. Using a spark plug wrench, remove the spark plugs.
3. Inspect the spark plugs:
If the electrode is oily, clean it using a clean, dry rag.
If the electrode has deposits on it, polish it using
emery paper. If the white insulator is cracked or
chipped, the spark plug needs to be replaced.
Recommended Spark plugs
NGK
®
BP-6ES
NHSP
®
/
TORCH
®
F6TC
NOTICE:
Using an incorrect spark plug
may damage the engine.
4. When installing a new spark plug,
adjust the plug’s gap to the specification on the
Specifications chart. Do not pry against the
electrode—the spark plug can be damaged.
5. Install the new spark plugs or
the cleaned spark plugs into the engine.
•
Gasket-style
:
Finger-tighten until the gasket
contacts the cylinder head,
then tighten about 1/2-2/3 turn more.
•
Non-gasket-style
:
Finger-tighten until the plug
contacts the cylinder head,
then tighten about 1/16 turn more.
NOTICE:
Tighten the spark plugs properly.
If loose
, the spark plugs will cause the
engine to overheat.
If overtightened
, the threads in the
engine block will be damaged.
6. Apply dielectric spark plug boot protector
(not included) to the ends of the spark plugs
and reattach the wires securely.
