Champion QL78YC Spark Plugs

Champion QL78YC Marine Spark Plug

Champion marine spark plugs are quality OEM replacements. The Champion QL78YC Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. It has been built to conform with ISO and SAE standards and provides dependable performance as well as durability. This OE type replacement plug resists fouling and offers exceptional corrosion resistance. The nickel copper alloy electrode at its core allows accurate heat range control for a longer life. Its resistor and flat head seat types are responsible for its enhanced performance. These marine spark plugs are designed to resist overheating under heavy engine loads.

NOTE: The Champion QL78YC Spark Plug is NOT compatible with the 1989 Johnson outboard motor. To find the best plug for these types of engines, use our Parts Finder located at the top of the Johnson Outboard Parts page. 

• Resists fouling
• Superior corrosion resistance
• Dependable and proven performance
• Increased conductivity and heat control for good overall wear

 Champion QL78YC Spark Plug

Specifications:

• Hex size: 13/16"
• Preset Gap: 0.025" - 0.640"
• Thread Reach: 0.500"
• Electrical Terminal Type: Non-removable nut
• Ground Electrode Core Material: Nickel
• Center Electrode Tip Material: Nickel

Frequently Asked Questions

What is the Champion QL78YC Marine Spark Plug used for?

The Champion QL78YC Marine Spark Plug is an OE-type replacement spark plug designed for marine applications. It features a copper core electrode for increased conductivity and heat control, while its construction helps resist fouling and corrosion. It is also designed to resist overheating under heavy engine loads.

Is the Champion QL78YC Spark Plug compatible with a 1989 Johnson outboard?

No. The Champion QL78YC Spark Plug is specifically listed as not compatible with the 1989 Johnson outboard motor. Customers with this engine should verify the correct replacement spark plug using the applicable parts-finding information before purchasing or installing a replacement.

What are the specifications of the Champion QL78YC Marine Spark Plug?

The Champion QL78YC Marine Spark Plug has a 13/16" hex size, 0.025" - 0.640" preset gap, and 0.500" thread reach. It uses a non-removable nut electrical terminal, with nickel used for both the ground electrode core material and center electrode tip material.

What features does the Champion QL78YC marine spark plug provide?

The Champion QL78YC features a copper core electrode that provides increased conductivity and heat control for good overall wear. Its nickel copper alloy electrode supports heat range control, while the plug is designed to resist fouling and corrosion. The resistor and flat head seat types are also identified as features that contribute to its performance.

Is the Champion QL78YC Spark Plug designed for marine use?

Yes. The Champion QL78YC is identified as a marine spark plug and an OE-type replacement. The description states that it conforms to ISO and SAE standards and is designed to provide dependable performance and durability in marine applications, including resistance to overheating under heavy engine loads.

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