Spark Plug Service
WARNING
Engines can become extremely hot during
normal operation. Hot engine components
can cause severe burns. Stop the engine and
allow it to cool before checking spark plugs.
Clean or replace the spark plugs and reset spark
plug gap (A) every 100 hours of operation.
•
Disconnect the spark plug caps from the spark
plugs and remove the spark plugs.
Clean the electrodes (B) by scraping with a wire
brush to remove carbon deposits.
Inspect for cracked porcelain or other wear and
damage. Replace the spark plug with a new one
if necessary.
Check the spark plug gap and reset if necessary.
The gap must be 0.75 mm (0.030 in). To change
the gap, bend only the side–electrode, using a
spark plug tool.
Install and tighten the spark plugs to 22 N·m (2.2
kgf·m, 16 ft·lb). Connect the spark plug caps.
RECOMMENDED SPARK PLUG
NGK ..................................BPR4ES
A. Spark Plug Gap
B. Electrodes
31
MAINTENANCE