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MAINTENANCE
NOTICE
Never apply any side load or move the spark plug
laterally when removing the spark plug. Applying a
side load or moving the spark plug laterally may crack
and damage the spark plug boot.
Figure 49 – Removal of Spark Plug Boot
5. Clean area around the spark plug.
6. Using the spark plug socket wrench provided,
remove the spark plug from the cylinder head (see
Figure 50).
Figure 50 – Removing Spark Plug
7. Place a clean rag over the opening created by the
removal of the spark plug to make sure no dirt can
get into the combustion chamber.
8. Inspect the spark plug for:
• Cracked or chipped insulator
• Excessive wear
• Spark plug gap of 0.032 in. (0.80 mm) (see
Figure 51).
If the spark plug fails any one of the conditions
listed above, replace the plug.
NOTICE
Only use the recommended spark plug (Torch
A5RTC or equivalent). See chart below. Using a non-
recommended spark plug could result in damage to
the engine.
Figure 51 – Spark Plug Gap Requirements
8. Install the spark plug by carefully following the steps
outlined below:
a - Carefully insert the spark plug back into the
cylinder head. Hand-thread the spark plug until
it bottoms out.
b - Using the spark plug socket wrench provided,
turn the spark plug to ensure it is fully seated.
c - Replace the spark plug boot, making sure the
boot fully engages the spark plug’s tip.
d - Install the spark plug access cover.
Recommended Spark Plug Replacement:
AutoLite 4194
Denso 6010
NGK CR4HJB
Torch A5RTC
23
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