Description
Champion QL77CC Marine Spark Plug, 1-Pack (Mercury 941M)
Built for marine duty, the Champion QL77CC delivers consistent spark, efficient combustion, and long service life. Its copper-core center electrode promotes better heat dissipation, helping maintain performance under sustained RPM and varying loads—so your engine starts cleanly, idles smoothly, and responds when you throttle up.
Applications
- Use where Champion QL77CC or Mercury 941M is specified in the owner’s/service manual
- Common across select Mercury/Mariner marine engines and other applications calling for QL77CC
- Always verify by exact engine model and serial number before installation
Shipping & Returns
Fast shipping from Wisconsin with reliable carriers. Need help confirming compatibility? We’re happy to assist. Returns are simple—see our Return Policy.
Key Facts
- Brand: Champion
- Plug Type: QL77CC (resistor, copper-core)
- Mercury Cross-Ref: 941M
- Design: Copper core for heat transfer; precision-engineered for consistent spark
- Benefits: Efficient combustion, reliable starts, helps maintain fuel economy and reduce fouling
- Gap: Pre-gapped to manufacturer spec (verify/adjust per manual before install)
- Store Category: Parts > Spark Plugs
- Pack Size: 1 plug
What’s Included
- 1 × Champion QL77CC marine spark plug (OEM-equivalent to Mercury 941M)
Service Notes
- Replace all plugs at the same time for even ignition performance across cylinders
- Check and set gap to engine specification using a wire-type gauge before installation
- Thread in by hand first to avoid cross-threading; torque to the value specified in your service manual
- Most plated plug threads do not require anti-seize; follow engine/plug manufacturer guidance
- Inspect boots and leads; resolve any misfire sources (wires/coils) during plug service