Champion RV8C (Part #121) is a tapered-seat, copper-core spark plug designed for dependable performance, often used in marine engines (Indmar, Mercury, Yamaha) and some older automotive applications. It features a 5/8" hex, 14mm thread, and 7/16" reach. These plugs offer superior corrosion resistance and heat control, with a 1.0mm (0.040") preset gap.
Key Specifications & Features:
Manufacturer: Champion (Copper Plus line)
Part Number: RV8C / 121
Thread Diameter: 14mm
Thread Reach: 7/16" (11mm)
Seat Type: Tapered
Hex Size: 5/8" (16mm)
Heat Range: 8
Electrode Material: Copper core with nickel alloy tip
Resistor: Yes
Common Applications:
Marine: Frequently used in Indmar, Mercury Marine, Volvo Penta, and Yamaha engines.
Other: Select motorcycles, scooters, and older GM vehicles (e.g., 1970s Chevy models).
Key Benefits:
Heat Control: Copper core ensures accurate heat range control for longer life and durability.
Corrosion Resistance: Patented TinTac and ULTRASEAL coated shell.
Performance: Designed to suppress EMI & RFI for consistent performance.
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