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Champion Copper Plus Spark Plug CJ8

Champion Copper Plus Spark Plug CJ8

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Pre-gapped and ready to install for reliable starts in chainsaws and pumps.
Champion MPN 843S
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

In-Store Exclusive

This one's worth the trip to the store.

This Champion item is one you'll find in stores rather than online — and that's often the better way to buy. In store you get the genuine article, full manufacturer warranty, and real advice from someone who's actually handled it — no counterfeits, no gray-market resellers.

  • Authorized dealer network · Full manufacturer warranty & support
  • Guaranteed authentic · No counterfeits, no gray-market resellers
  • The brands set these standards · Be wary of sellers who don't follow them
Why isn't this online? The whole story →

About Product Overview

The Champion CJ8 is a Copper Plus spark plug built for small engines like chainsaws and pumps. It's a universal-fit replacement part, pre-gapped to spec, and made in the USA.

  • Plug number: CJ8
  • Gap: 0.027-0.033 in
  • Fits chainsaws and pumps

The Details Specifications

Brand Champion
Model / MPN 843S
UPC 037551790135
Weight 2 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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