The Champion Spark Plug – CJ6Y is a genuine OEM copper core spark plug designed to deliver reliable ignition performance in a wide range of small petrol engines. Engineered for consistent spark delivery, efficient combustion and dependable starting, the CJ6Y is commonly specified for chainsaws, brush cutters, hedge trimmers, blowers, lawnmowers and other handheld outdoor power equipment.

Built with a durable nickel alloy centre electrode and copper core construction for improved heat dissipation, the CJ6Y helps maintain stable engine performance, smooth throttle response and reduced fouling — making it a trusted replacement choice for both professional users and domestic equipment owners.

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Key Features

Genuine Champion OEM Spark Plug – Manufactured to Champion’s original equipment standards for dependable fitment and ignition performance.

Copper Core Centre Electrode – Enhances conductivity and heat transfer for improved combustion efficiency.

Optimised Heat Range (6) – Designed to operate within correct temperature thresholds to reduce carbon build-up and fouling.

10 mm Thread Diameter – Suitable for compact 2-stroke and small-capacity petrol engines.

19 mm (3/4") Reach – Correct thread length for compatible cylinder heads.

Resistor Type (RFI Suppression) – Helps minimise electrical interference with ignition systems and nearby electronics.

Part Reference: CJ6Y – Confirms correct Champion plug identification and compatibility.

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Technical Specifications

• Product Type: Spark Plug

• Brand: Champion

• Part Number: CJ6Y

• Thread Diameter: 10 mm

• Reach: 19 mm (3/4")

• Hex Size: 16 mm (5/8")

• Heat Range: 6

• Electrode Type: Copper core, standard projection

• Suppression: Yes (Resistor)

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Suitable Machines / Compatible Models

The Champion CJ6Y spark plug is widely used across small petrol-powered garden and forestry machinery. Typical compatible applications include:

• Selected STIHL chainsaws and brush cutters

• Selected Husqvarna handheld equipment

• Selected Echo 2-stroke engines

• Selected McCulloch chainsaws and trimmers

• Various small 2-stroke engines used in hedge trimmers, blowers and clearing saws

(Exact fitment depends on engine model and production year — always verify against your machine’s official parts diagram or existing spark plug specification before ordering.)

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Typical Compatible Applications

The CJ6Y spark plug is commonly fitted to:

• Petrol chainsaws

• Grass trimmers and brush cutters

• Hedge trimmers

• Leaf blowers

• Small-capacity lawn and garden engines

Ideal when replacing a worn, fouled or misfiring plug to restore smooth starting and consistent engine operation.

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Parts This Spark Plug Replaces / Cross References

The Champion CJ6Y may replace or cross-reference equivalent spark plugs of the same specification, including:

• NGK BM6A (equivalent heat range and thread size)

• Bosch WSR6F (equivalent specification)

• Other manufacturer equivalents matching 10 mm thread, 19 mm reach and similar heat range

(Always confirm cross-reference accuracy against manufacturer guidance before substitution.)

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Fitment Tip

Spark plugs must match the correct thread diameter, reach and heat range specified by the engine manufacturer. Before installation:

1. Check the part number printed on your existing plug.

2. Confirm thread size and reach.

3. Inspect and set the correct electrode gap as per your machine’s service manual.

Correct installation ensures optimal combustion efficiency, easier starting and reduced engine wear.

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Why Choose the Champion CJ6Y Spark Plug

The Champion CJ6Y is a dependable OEM-quality replacement spark plug trusted across the outdoor power equipment industry. Offering reliable ignition, improved heat control and durable construction, it helps maintain smooth engine performance and consistent starting — reducing downtime and keeping your equipment operating efficiently throughout demanding tasks.