Westinghouse EPA (49 state) and CARB (50 state) WH3250C 业主指南

32 

SPARK PLUG MAINTENANCE

The spark plug must be checked and cleaned after 

every 100 hours of use or 6 months and must be 

replaced after 300 hours of use or every year.

1.  Stop the generator and let it cool for several 

minutes if running.

2.  Move the generator to a flat, level surface.
3.  Remove the spark plug boot by firmly pulling the 

plastic spark plug boot handle directly away from 

the engine (see Figure 36).

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.

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 37).

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:

•  Cracked or chipped insulator
•  Excessive wear
•  Spark plug gap (the acceptable limit of 0.024 – 

0.032 in. [0.60 – 0.80 mm]) (see Figure 38).

If the spark plug fails any one of the conditions 

listed above, replace the plug with a Champion 

RN9YC plug or equivalent.

Only use the recommended spark plug (Champion 

RN9YC or equivalent). Using a non-recommended 

spark plug could result in damage to the engine.