Champion QL77JC4 Marine Spark Plug, Copper Core, Cross-Ref 828M, Fits Evinrude, Mariner, OMC, Suzuki, Volvo Penta, Yamaha Outboards

The Champion QL77JC4 is a marine spark plug built as an OE type replacement, engineered to conform to ISO and SAE standards for dependable performance and durability. At its core is a copper center electrode that increases conductivity and improves heat control, giving the plug good overall wear characteristics even under the heavy, sustained loads typical of outboard engine operation. The nickel copper alloy electrode allows for accurate heat range control, extending service life, while a resistor terminal and flat seat design support consistent ignition performance. The plug resists fouling and offers strong corrosion resistance, making it a reliable choice for routine ignition maintenance on compatible outboard motors.

The Champion QL77JC4 is compatible with a range of outboard engine brands, including Evinrude, Mariner, OMC, Suzuki, Volvo Penta, and Yamaha. Because compatibility can vary by specific engine model, boat owners should confirm fitment against their engine's parts documentation before ordering. This plug is cross-referenced to Champion Spark Plug number 828M, making it easy to identify as a direct equivalent when replacing an existing plug carrying that designation.

Specifications

• Brand: Champion
• Manufacturer Part Number: CCH828M
• Champion Spark Plug Number: 828M
• Core Material: Copper
• Center Electrode Material: Nickel copper alloy
• Thread Size: 14 millimeters x 1.25 millimeters
• Seat Type: Flat
• Electrical Terminal Type: Resistor
• Industry Standards: ISO and SAE conforming
• Weight: 0.15 pounds
• UPC: 037551005123
• Unit Count: 1 spark plug
• Compatible Outboard Brands: Evinrude, Mariner, OMC, Suzuki, Volvo Penta, Yamaha

Fitment

• Evinrude outboard engines
• Mariner outboard engines
• OMC outboard engines
• Suzuki outboard engines
• Volvo Penta outboard engines
• Yamaha outboard engines

Replaces (OEM)

• 828M

Frequently Asked Questions

What engines is the Champion QL77JC4 spark plug compatible with? The Champion QL77JC4 marine spark plug is compatible with a number of outboard engine brands, including Evinrude, Mariner, OMC, Suzuki, Volvo Penta, and Yamaha. Because compatibility can vary between specific engine models, it is recommended to confirm fitment against the engine's own parts documentation before ordering.

Is 828M the same as the QL77JC4 spark plug? Yes, Champion Spark Plug number 828M and the QL77JC4 refer to the same spark plug, so either identifier can be used to find the correct replacement part.

What material is the electrode made of? A copper center electrode is used in the QL77JC4, paired with a nickel copper alloy ground electrode, which together provide increased conductivity and accurate heat range control for a longer service life.

What is the thread size of this spark plug? The Champion QL77JC4 has a 14 millimeter x 1.25 millimeter thread size.

Is this a genuine Champion part or an aftermarket equivalent? The QL77JC4 is a genuine Champion spark plug, built as an OE type replacement that conforms to ISO and SAE standards for performance and durability.

How many spark plugs come in one order? Each order of the Champion QL77JC4 (828M) includes one spark plug.

Does the QL77JC4 resist fouling and corrosion? Yes, the QL77JC4 is designed to resist fouling and offers superior corrosion resistance, which helps maintain reliable ignition performance in marine environments.

What terminal and seat type does this plug use? The Champion QL77JC4 uses a resistor electrical terminal and a flat seat design.

Why choose a copper core plug like the QL77JC4 over another Champion marine plug? The QL77JC4's copper core electrode provides increased conductivity and heat control for good overall wear, making it well suited to the heavy, sustained loads typical of outboard engine operation.

Can the QL77JC4 handle heavy engine loads without overheating? Yes, the Champion QL77JC4 is designed to resist overheating under heavy engine loads, which is a key requirement for outboard marine ignition systems.

Is the QL77JC4 spark plug built to any recognized standards? The QL77JC4 is built to conform with ISO and SAE standards, supporting dependable performance and durability.