Honda 98052-56471 Spark Plug (CM6)

The Honda 98052-56471 Spark Plug (CM6) is a genuine OEM replacement designed for E300, EM400, and ER400 generators. As a factory-original component, this spark plug is sourced directly from Honda and carries the correct heat range, electrode gap, and thread specification for these generators. Verify your generator's model and serial number against the fitment table before ordering — Honda supersedes parts at production breaks, and confirming the match ensures this is the right plug for your unit.

Key Features

• Correct Heat Range for These Generators — the CM6 designation identifies the specific heat range Honda specifies for E300, EM400, and ER400 generators, ensuring the plug runs neither too hot nor too cold under load
• Genuine OEM Part — sourced directly from Honda, part number 98052-56471 meets the exact specification Honda built these generators around, with no substitution on electrode design or thread dimensions
• Direct OEM Replacement — installs as a direct swap for the original plug; no modifications or adapter hardware needed
• Check Your Serial Number — Honda updates parts at production serial breaks, so verify your unit's serial number against the fitment table to confirm this plug applies to your generator

A spark plug is the ignition source in a generator's engine — it produces the timed electrical spark that ignites the air-fuel mixture in the combustion chamber. When a spark plug wears out, the electrode gap widens, the insulator cracks, or carbon buildup fouls the tip, all of which result in misfires, hard starting, rough running, and reduced output. Replacing a worn plug with the correct CM6-grade unit restores clean ignition timing, stable combustion, and consistent generator output.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.