Champion Copper Plus Marine Spark Plug CCH304 - Copper Core Electrode

The Champion Copper Plus Marine Spark Plug (CCH304) is a copper-core spark plug built specifically for marine engines that see heavy, sustained loads. The copper core electrode delivers increased conductivity and precise heat range control, helping the plug resist overheating during hard running and extended wide-open-throttle use that is common on the water. Champion built this plug with a Copper Plus design intended for dependable, consistent performance and good overall wear life rather than the shorter service intervals typical of lower-grade plugs.

Corrosion resistance is handled by Champion's patented TinTac and ULTRASEAL coated shell, which helps the plug hold up in the salt-air and moisture-heavy environment marine engines operate in. The plug also uses Champion's patented SAC-9 semiconductor resistor, which suppresses electromagnetic interference (EMI) and radio-frequency interference (RFI) so onboard electronics and marine radios run cleaner. Every CCH304 spark plug is manufactured to ISO and SAE standards, giving it the same fit, spark quality, and durability expected of an OEM-grade replacement plug.

This is a quality OEM-style replacement plug intended as a maintenance item for marine engines, and it installs the same way as the plug it is replacing using a standard spark plug socket.

Specifications

• Brand: Champion
• Manufacturer Part Number: CCH304
• Core Material: Copper
• Top Material Type: Copper
• Thread Size: 14mm
• Weight: 0.15 pounds
• UPC: 037551000371
• Unit Count: 1

Frequently Asked Questions

What makes the Champion CCH304 different from a standard spark plug? The Champion CCH304 uses a copper core electrode for increased conductivity and precise heat range control, plus a TinTac and ULTRASEAL coated shell for corrosion resistance, both of which are aimed at heavy-load marine engine use rather than typical automotive duty.

Is the CCH304 spark plug corrosion resistant? Yes. The Champion CCH304 has a shell treated with Champion's patented TinTac and ULTRASEAL coatings, which provide corrosion resistance suited to the marine environment.

Does the CCH304 help reduce electrical interference? It does. The CCH304 uses Champion's patented SAC-9 semiconductor resistor, which suppresses EMI and RFI so nearby marine electronics and radios experience less interference.

What is the thread size on the Champion CCH304? The Champion CCH304 spark plug has a 14mm thread size.

How much does the CCH304 spark plug weigh? The Champion CCH304 weighs 0.15 pounds.

Is the Champion CCH304 an OEM-quality replacement plug? Yes, the CCH304 is built to ISO and SAE standards, giving it OEM-grade fit and performance as a replacement spark plug.

What core material does the CCH304 spark plug use? Copper. The CCH304 uses a copper core center electrode, which allows for accurate heat range control and good overall wear life.

How many spark plugs come in one CCH304 package? The Champion CCH304 is sold as a single spark plug (unit count of 1).

Why does the CCH304 resist overheating better than some other plugs? Its copper core electrode allows Champion to precisely control the plug's heat range, which is designed to keep the CCH304 running cool under the sustained high loads common in marine engines.

Can I use the Champion CCH304 as a routine maintenance replacement? Yes, the CCH304 is intended as a direct maintenance replacement plug and installs with a standard spark plug socket.