When should the spark plug on an electrical generator be replaced?

• A. When it is damaged
• B. After three months of use
• C. During routine maintenance
• D. After five to eight months of use

Answer: (A)

Spark plugs provide the spark that ignites the air-fuel mixture, and they wear or get damaged with use. Replacing it when it is damaged ensures reliable ignition, smooth running, and prevents misfires that can reduce power and damage the engine. Routine maintenance should include inspecting the plug for damage or excessive wear, but replacement isn’t tied to a fixed time frame; it depends on condition. Fixed intervals like three months or five to eight months don’t account for differences in use, fuel quality, and operating conditions, and would risk running with a compromised plug.