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Multiple models matched. Select your model to confirm fit.

NGK Spark Plug (CR4HSB)

Plug spark

Plug; spark

Boot; spark plug

Plug; spark

Plug; spark

Spark plug

Spark plug gap: 0.030''''

Spark plug

Spark plug

Honda Spark Plug (ZGR5A)

Spark plug

Spark plug

Spark plug

Spark plug
Generators rely on the spark plug to start. Gas-powered generator won't start if the spark plug fails to fire properly. Therefore, it is recommended to check for buildup and damage on the spark plug as part of routine maintenance. If a spark plug on your generator is no longer in good condition, it is time to replace it. For more information on replacing your generator's spark plug, please see our Generator Repair Help and Troubleshooting section. Our generator repair section includes step-by-step instructions and videos for troubleshooting problems with your generator, inspecting spark plugs, and replacing generator spark plugs.
Repair Clinic has a huge online database inventory of replacement generator parts in stock for all major brands, including Honda, Generac, Craftsman, Briggs and Stratton, Ryobi, Black Max, and many others. These are all genuine OEM parts that are guaranteed to fit. To find a matching spark plug for your generator, simply enter its model number in the search window at the top of this page. Are you looking for a generator spark plug supplier nearby? All spark plugs and generator parts are in stock and available to ship the same day, right to your door. As a result, Repair Clinic is always close by and ready to deliver the lawn equipment part you need as quickly as possible!
We recommend examining your generator’s spark plug for damage as part of routine maintenance. A good rule-of-thumb is to change generator spark plugs every 100 hours of operation. If the spark plug is damaged, it is recommended to replace it as soon as possible. So, make sure to check the spark plug on your generator as part of routine maintenance and replace it if there is damage or buildup.