Owner's Manual

MAINTENANCE

Figure 34 – Removal of Spark Plug Boot

4. Clean area around the spark plug.

5. Using the 13/16" spark plug socket wrench

provided, remove the spark plug from the cylinder

head (see Figure 35).

Figure 35 – Removing Spark Plug

6. 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.

7. Inspect the spark plug for:

x Cr

acked or chipped insulator

x Excessive wear

x Spark plug gap (the acceptable limit of 0.024 –

0.032 in. [0.60 – 0.80 mm]) (see Figure 36).

If the spark plug fails any one of the conditions

listed above, replace the plug with a Champion

RN9YC plug or equivalent.

NOTICE

Only use the recommended spark plug (Champion

RN9YC or equivalent). Using a non-recommended

spark plug could result in damage to the engine.

Figure 36 – 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 13/16" 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 spar

k plug’s tip.

Recommended Spark Plug Replacement:

AutoLite 63

Champion RN9YC

Bosch WR7DS

Torch F6RTC