Champion 9321 QL82YC Copper Core Marine Spark Plug

The Champion 9321 (QL82YC) is a traditional copper core spark plug engineered for marine, powersports, and small-engine applications. Built to Champion's proven standards, this plug delivers reliable ignition performance, improved throttle response, and consistent heat dissipation across a wide range of engine types.

Key Features:

• Copper Core Electrode – Provides increased electrical conductivity and superior heat control for reduced wear over time
• 14mm Thread Diameter with 12.7mm (1/2") Reach for a precise, secure fit
• Projected Tip Design – Improves combustion efficiency and throttle response
• Gasket Seat – Ensures a proper, leak-free seal in the cylinder head
• Built-In Resistor – Suppresses electromagnetic interference for cleaner engine operation
• 13/16" (20.6mm) Hex Size for easy installation with standard tools
• Alumina Silicate Ceramic Insulator – Delivers enhanced strength and efficient heat transfer
• Trivalent Metal Plating – Provides superior anti-corrosion and anti-seize protection, ideal for marine environments
• Nickel Shell Construction – Durable and corrosion-resistant for long service life

Specifications:

• Thread Diameter: 14mm
• Thread Reach: 12.7mm (1/2")
• Hex Size: 13/16" (20.6mm)
• Seat Type: Gasket (Flat)
• Tip Configuration: Projected
• Terminal Type: Solid
• Construction: Standard
• Resistor: Yes

Cross-Reference Part Numbers: Champion 932M, Champion 932S, Champion QL82YC

The Champion QL82YC spark plug is sold individually (each) and is backed by Champion's century-long legacy of quality ignition engineering — trusted across marine, automotive, and small-engine platforms worldwide.