Champion Copper Plus Spark Plugs for Small Engines RC12YC (71) — 6-Pack, Copper Core & SAC-9 Resistor

Champion RC12YC (71G) Copper Plus spark plug is a six-pack of reliable small-engine ignition plugs engineered for consistent starts and controlled heat transfer.

This box of six Champion Copper Plus 71 spark plugs delivers proven materials and manufacturing features designed for lawnmowers, generators, and other small engines. Built around a copper core center electrode for precise heat range control and longer service life, these plugs also include Champion’s SAC-9 resistor and advanced shell treatments to reduce interference and resist corrosion. The result is dependable ignition performance and simplified maintenance for common outdoor equipment.

How does this spark plug improve starting and throttle response?

The copper core helps maintain a stable spark temperature and timing, which supports reliable ignition across a range of conditions. A consistent spark reduces misfires and aids smoother throttle transitions on small engines.

• Copper core center electrode for steady heat conduction and spark stability
• Precision gap and robust electrode geometry for repeatable ignition
• Packaged as a six-count box so you have spare plugs on hand

What anti-interference and corrosion protections are included?

Champion’s patented SAC-9 semi-conductor resistor suppresses electromagnetic and radio-frequency interference that can affect sensitive electronics. The shell is treated with TinTac and ULTRASEAL coatings to defend against rust and improve thread seal longevity.

• SAC-9 resistor minimizes EMI/RFI for cleaner electrical environments
• TinTac plating improves conductivity and installation torque control
• ULTRASEAL shell prevents corrosion and helps maintain a gas-tight seal

Which engines and maintenance intervals suit the RC12YC (71G)?

These plugs are specified for many small gasoline engines found in lawn and garden equipment, portable generators, and similar machinery. Replacement frequency depends on engine hours and operating conditions, but keeping a fresh plug every season or per manufacturer interval is common practice.

• Designed for small four-stroke engines like lawnmowers and generators
• Good to inspect at each seasonal service; replace per equipment maker’s schedule
• Sold in a convenient 6-pack to cover routine swaps and backups

How do I install and check these spark plugs safely?

Always shut off the engine and disconnect the spark plug wire before removal. Use the correct socket, torque to the engine manufacturer’s specification, and verify the gap matches the equipment’s recommended value.

• Disconnect ignition lead and cool engine before working
• Use spark plug socket and torque wrench for proper seating
• Confirm and adjust gap per engine manual before installation

Who is this for: The Champion RC12YC (71G) Copper Plus 6-pack is ideal for homeowners, landscapers, and small-engine technicians who want a dependable, OEM-quality replacement plug that balances cost and performance. If you service lawnmowers, pressure washers, portable generators, or other small gas engines and value reliable starting, reduced electromagnetic interference, and corrosion resistance, this set provides practical spares and proven engineering for routine maintenance.