Champion CCH406 Copper Plus Marine Spark Plug RV12YC for Chrysler Inboard Engines

The Champion CCH406 is a Copper Plus marine spark plug built around the industry-standard RV12YC design, identified by Champion as plug number 406. It is engineered for dependable ignition performance in marine engines that see heavy, sustained loads, where overheating and fouling are common failure points for lower-grade plugs. This spark plug is a quality OEM-style replacement, not a generic aftermarket substitute.

At the core of the CCH406 is a copper center electrode, which conducts heat and current more efficiently than solid steel or nickel-alloy designs, allowing for accurate control of heat range and longer service life. The shell is treated with Champion's patented TinTac and ULTRASEAL coatings, which provide maximum corrosion resistance against the moisture and salt exposure typical of marine environments. A patented SAC-9 semiconductor is built into the plug to suppress electromagnetic (EMI) and radio-frequency (RFI) interference, helping protect onboard electronics and marine radios from ignition noise. Every CCH406 plug is manufactured to ISO and SAE standards for consistent, proven performance.

The CCH406 is listed under Champion's Chrysler inboard marine engine spark plug line, and the same RV12YC design has also been used as Champion part 406 in 1970-1997 Chevrolet C1500 and Chevrolet K1500 trucks, giving it a broad, well-documented cross-application history.

Specifications

• Brand: Champion
• Manufacturer Part Number: CCH406
• Champion Plug Number: 406
• Spark Plug Type: RV12YC (Copper Plus, resistor)
• Core Material: Copper
• Shell Coating: TinTac and ULTRASEAL corrosion-resistant coating
• EMI/RFI Suppression: SAC-9 semiconductor
• Application: Chrysler inboard marine engines
• Vehicle Cross-Application: 1970-1997 Chevrolet C1500, Chevrolet K1500
• Standards: Built to ISO and SAE standards
• UPC: 037551000203
• Weight: 0.15 pounds
• Unit Count: 1 spark plug

Fitment

• Chrysler inboard marine engines
• 1970-1997 Chevrolet C1500 and Chevrolet K1500 (cross-application)

Replaces (OEM)

• Bombardier 912937
• Massey Ferguson 1060024-MI

Frequently Asked Questions

What engines is the Champion CCH406 spark plug designed for? The Champion CCH406 is listed for Chrysler inboard marine engines, and the same RV12YC design (Champion number 406) has also been used in 1970-1997 Chevrolet C1500 and Chevrolet K1500 trucks.

Is the CCH406 the same as the Champion RV12YC? Yes, CCH406 is the Champion Copper Plus spark plug built to the RV12YC design, also identified by Champion as plug number 406.

What is the center electrode made of? The CCH406 uses a copper core center electrode, which improves conductivity and allows accurate control of heat range for longer plug life.

Will this spark plug hold up in a marine environment? Yes, the CCH406's shell has Champion's patented TinTac and ULTRASEAL coatings, which are designed for maximum corrosion resistance in marine conditions.

What OEM part numbers does the CCH406 cross-reference to? The Champion CCH406 (RV12YC) cross-references to Bombardier 912937 and Massey Ferguson 1060024-MI.

How much does the CCH406 spark plug weigh? The Champion CCH406 spark plug weighs 0.15 pounds.

Does this plug fit a 1970-1997 Chevrolet C1500 or K1500? Yes, this Champion 406 (RV12YC) spark plug, sold here as the CCH406, has been used in 1970-1997 Chevrolet C1500 and Chevrolet K1500 trucks.

Does the CCH406 help with radio or electronics interference? It includes Champion's patented SAC-9 semiconductor, which suppresses EMI and RFI interference generated by the ignition system.

Is the CCH406 a genuine Champion part? Yes, the CCH406 is a genuine Champion Copper Plus spark plug (RV12YC design), not a generic aftermarket copy.

What manufacturing standards is this spark plug built to? The Champion CCH406 is built to ISO and SAE standards for proven, consistent ignition performance.

How many spark plugs come in an order of the CCH406? An order of the Champion CCH406 includes one spark plug.

What is the UPC for the Champion CCH406 spark plug? The UPC for the Champion CCH406 (Champion 406, RV12YC) spark plug is 037551000203.