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Champion Spark Plug - RC12YCMP
Champion Spark Plug - RC12YCMP
Low stock: 2 left
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A tired spark plug shows up as hard starting, rough running and wasted fuel. Dropping in a fresh Champion sorts all of that for the price of a coffee or two.
Champion resistor plugs are a proven pick for four stroke mowers and small engines, with a copper core for steady heat transfer, a projected tip for a clean burn, and a resistor to keep ignition interference down. The gasket seat and 14 millimetre thread are the common small engine fitment, with a 19 millimetre reach and a 5/8 inch hex.
Worth knowing, plugs are not one size fits all. Check your engine manual or bring your old plug in so the thread, the reach and the heat range line up. A yearly plug change is one of the cheapest ways to keep mower and garden gear starting first pull.
Full specs and fitment are in the tabs below, and we are happy to check the right plug with you in store.

Champion Spark Plug - RC12YCMP
$13.35
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Plug specs
- Brand: Champion
- Part: RC12YCMP resistor spark plug
- Thread size: 14mm
- Reach: 19mm (3/4")
- Hex size: 5/8" (16mm)
- Seat: Gasket
- Construction: Copper core, projected tip, resistor
- Heat range: 12
- Best for: 4-stroke mowers and small garden engines
- Stock code: RC12YCMP
Why fit a fresh one
- Easier starting and smoother running once fitted
- A cheap, quick fix for a tired, hard-starting engine
- Copper core and projected tip for steady, clean spark
- Resistor keeps electrical interference down
- A yearly change keeps mowers reliable through the season
- We can check the right plug for your gear in store
Shipping and Returns
We pack and send your order with care, right here from our Strathalbyn store. Most parcels leave within 1-2 business days, and you'll get tracking as soon as it's on the way. If you're local, you can choose click-and-collect or our delivery service at checkout.
If something arrives damaged or not quite right, let us know within 14 days and we'll sort it quickly. You can return unused items in their original condition for a refund or store credit. For safety reasons, we can't accept returns on gas bottles, cut materials, or custom orders.
We're here to make things easy, so if you ever have a question about your delivery or a return, our team is only a call away.
Why you'll love shopping with us
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Keeps the rig moving
From booster cables to jerry cans, we stock the bits that get you out of trouble.
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Right part, less guessing
Tell us the job and we'll help match the spec so it fits first go.
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Backup when it matters
If something's not right, you deal with people who want it sorted.