Champion Spark Plug - RJ19LMC

Name: Champion Spark Plug - RJ19LMC
Brand: Champion
SKU: hqy5v77rze
Availability: InStock

Champion RJ19LMC COPPER PLUS Spark Plug. When it's time to replace the OE spark plugs in your vehi...

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Product Information

Full details

The Champion RJ19LMC Copper Plus spark plug is designed for owners of small engines, including lawn mowers and string trimmers, who need a reliable OE-replacement part to maintain consistent ignition performance. Featuring a durable copper-core center electrode and advanced corrosion-resistant coating, it ensures longevity and steady combustion, though users must verify engine compatibility as it is specifically engineered for precise thread and gap dimensions.

All features

Model Part Number	RJ19LMC/T10
Brand	Champion

Extended Product Information

FAQs

What is the correct electrode gap for the RJ19LMC?

The factory specification for this plug is 0.5 mm.

Does this spark plug come pre-gapped?

While it is shipped with specific dimensions, it is best practice to verify the gap with a feeler gauge before installation.

What size socket do I need for this plug?

You need a 21 mm spanner or spark plug socket.

Can I use this in any engine?

No, it is designed for specific small engine applications. Always use the manufacturer's cross-reference guide to ensure compatibility.

How should I clean the spark plug?

If there is light carbon buildup, use a soft wire brush or specialized spark plug cleaner, but ensure the gap remains at 0.5 mm afterward.

What is the tightening torque range?

The plug should be tightened to a value between 25 Nm and 30 Nm.

Troubleshooting

Engine fails to start

Check the spark plug wire connection and ensure the plug is properly seated. Verify that the gap is set to 0.5 mm.

Engine misfiring or running rough

Inspect the electrode for heavy carbon deposits; clean or replace if fouling is severe. Verify the tightening torque is between 25-30 Nm.

Pros and Cons

Pros

Excellent heat dissipation due to copper-core design
High resistance to rust and corrosion thanks to Ultraseal™ technology
Reliable ignition performance in small engines like mowers and trimmers
Standardized SAE connector for wide compatibility
Durable nickel-grade construction

Cons

Limited to specific small engine applications
Requires professional or careful DIY installation to avoid thread damage
Gaps must be checked/verified before installation

Setup, Compatibility & Care

Before installation, verify your engine's manual to ensure the RJ19LMC matches the required heat range and thread specifications.

Preparation: Ensure the engine is cool. Clean the area around the old spark plug to prevent debris from entering the combustion chamber.
Removal: Use a 21 mm spanner (socket) to carefully unscrew the existing plug.
Gap Verification: Use a gap tool to confirm the 0.5 mm electrode gap matches your engine manufacturer's specifications.
Installation: Thread the new plug by hand initially to avoid cross-threading. Use a torque wrench to tighten to the recommended range of 25 Nm to 30 Nm.
Maintenance: Regularly inspect the electrode for signs of excessive carbon buildup or wear every season.