Champion RV15YC4 Marine Spark Plug (Champion #18) - Replaces Mercury Marine 33-896329018, Johnson/Evinrude 0765904, 0765846, 0772347, 3854400

The Champion RV15YC4 is a Copper Plus marine spark plug, identified by Champion as Spark Plug #18. It is built as a quality OEM replacement for outboard and sterndrive engines that call for this plug, using a copper core center electrode that improves conductivity and gives precise control over heat range for good overall wear. The design is engineered to resist overheating under the sustained heavy loads typical of marine engines.

The shell carries Champion's patented TinTac and ULTRASEAL coatings for maximum corrosion resistance in the marine environment, while a patented SAC-9 semiconductor suppresses EMI and RFI interference that can affect onboard electronics. The plug is manufactured to ISO and SAE standards for consistent, proven performance.

This plug is a direct cross-reference replacement for Mercury Marine 33-896329018 and Johnson/Evinrude 0765904, 0765846, 0772347, and 3854400, making it easy to order the correct plug by whichever part number you have on hand.

Specifications

• Brand: Champion
• Manufacturer Part Number: CCH18
• Champion Product Number: RV15YC4
• Champion Spark Plug Number: 18
• UPC: 037551001743
• Electrode Material: Copper core
• Shell Coating: TinTac and ULTRASEAL corrosion-resistant coating
• Interference Suppression: SAC-9 semiconductor (EMI/RFI)
• Standards: Built to ISO and SAE standards
• Weight: 0.15 pounds

Replaces (OEM)

• Mercury Marine 33-896329018
• Johnson/Evinrude 0765904
• Johnson/Evinrude 0765846
• Johnson/Evinrude 0772347
• Johnson/Evinrude 3854400

Frequently Asked Questions

What is the Champion RV15YC4 spark plug also known as? The RV15YC4 is Champion's internal designation for Spark Plug #18, a Copper Plus marine spark plug with a copper core center electrode.

Does the Champion RV15YC4 replace Mercury Marine 33-896329018? Yes, the Champion RV15YC4 (Champion Spark Plug #18) is a direct replacement for Mercury Marine part number 33-896329018.

Which Johnson/Evinrude part numbers does this spark plug cross-reference? This plug replaces Johnson/Evinrude 0765904, 0765846, 0772347, and 3854400.

What is the electrode made of? The RV15YC4 uses a copper core center electrode, which gives accurate control of heat range for longer plug life and good wear characteristics.

How does this plug resist corrosion? Champion applies its patented TinTac and ULTRASEAL coatings to the shell of Spark Plug #18 for maximum corrosion resistance in marine use.

Will this spark plug interfere with onboard electronics? No, the RV15YC4 incorporates Champion's patented SAC-9 semiconductor, which provides maximum EMI and RFI suppression to limit electrical interference.

How much does the Champion RV15YC4 spark plug weigh? This spark plug weighs 0.15 pounds.

Is this a genuine Champion part or an aftermarket copy? It is a genuine Champion Copper Plus marine spark plug, sold under Champion's own part number RV15YC4 (Spark Plug #18).

What quality standards is this plug built to? The RV15YC4 is manufactured to ISO and SAE standards for proven, consistent performance.

How many spark plugs come in an order? This listing is for one Champion RV15YC4 (Spark Plug #18) spark plug.

What is the UPC for this spark plug? The UPC for the Champion RV15YC4 spark plug is 037551001743.

Can I use the Mercury Marine or Johnson/Evinrude part number to order this plug? Yes, this Champion RV15YC4 plug (Champion #18) is the correct replacement whether you reference it by Mercury Marine 33-896329018 or Johnson/Evinrude 0765904, 0765846, 0772347, or 3854400.