Champion Spark Plug - 25

Name: Champion Spark Plug - 25
Brand: Champion
SKU: hg4nzlzoph
Availability: InStock

The Champion Copper Plus spark plug is designed for reliable performance in vehicles, mowers, and ...

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CHAMPION Spark Plug | CCH25 | OE-Matching Quality | Reliable Ignition & Efficient Combustion | Pack of 4

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Product Information

Full details

The Champion Spark Plug 25 is an essential component designed for automotive enthusiasts, landscaping professionals, and homeowners seeking reliable ignition for vehicles, lawn mowers, and small power equipment. The primary benefit of this plug is its ability to deliver consistent performance through superior heat dissipation and conductivity, though users should note it is specific to equipment requiring an M14 x 1.25 thread dimension, making compatibility checks vital before installation.

All features

Model Part Number	25
Brand	Champion

Extended Product Information

FAQs

What is the electrode gap for this plug?

The Champion 25 comes with a pre-set electrode distance of 0.9 mm.

Can I use this in my lawn mower?

Yes, provided your mower engine specifies an M14 x 1.25 thread and requires an 11.2 mm thread reach.

What is the purpose of the Ultraseal coating?

The Ultraseal coating is a patented finish that provides maximum corrosion resistance to the plug shell.

How often should I replace these spark plugs?

Replacement intervals vary by engine type, but it is best practice to inspect them annually or at the engine manufacturer's recommended service interval.

Is this a resistor spark plug?

Yes, it utilizes a SAC-9 semiconductor resistor to ensure consistent electrical performance and reduced interference.

What thread dimensions does this plug use?

The thread dimensions are M14 x 1.25 with a total thread length of 11.2 mm.

Troubleshooting

Engine is misfiring or running rough

Check the electrode gap to ensure it is set to the manufacturer's specification and inspect the spark plug wire for damage.

Difficulty starting the engine

Remove the plug to inspect for fuel fouling or carbon deposits; if the electrode is heavily coated, the plug should be replaced.

Plug is difficult to thread into the cylinder head

Stop immediately to avoid cross-threading; clean the threads in the engine head and ensure the plug is perfectly aligned before re-inserting.

Pros and Cons

Pros

Excellent heat dissipation due to copper-core design
High corrosion resistance from the patented Ultraseal coating
Reliable ignition consistency provided by the SAC-9 resistor
Versatile application across vehicles and small engines

Cons

Fixed 0.9 mm electrode gap may require adjustment for specific niche engines
Limited to M14 x 1.25 thread specifications
Not suitable for engines requiring longer reach spark plugs

Setup, Compatibility & Care

Before installation, verify that your engine block requires the M14 x 1.25 thread dimension and an 11.2 mm thread length.

Ensure the engine is completely cool before removing the old spark plug to prevent thread damage.
Clean the area around the spark plug port to prevent debris from entering the combustion chamber.
Thread the plug by hand initially to ensure proper alignment and avoid cross-threading.
Use a torque wrench to tighten to the manufacturer's specified foot-pounds, ensuring the plug is properly seated.
Inspect the electrode periodically for carbon buildup; if fouled, replace the plug to maintain engine efficiency.