NGK NGK Iridium IX Spark Plug P/N:3903
NGK 6853 is an Iridium IX spark plug with a fine wire iridium center electrode, one of the NGK spark plugs made for the performance enthusiast. It is listed for a wide range of Arctic Cat, Polaris and Yamaha models, including the 2023-2025 Arctic Cat ZR 600 R-XC ES 599cc, the 2024-2025 Arctic Cat ZR 600 Atac ES 129 599cc and the 2024-2025 Arctic Cat ZR 600 Atac ES 137 599cc; see the "Vehicles it fits" section for the full list.
A worn plug can show up as hard starting, a rough idle or a misfire. The plug cap, the ignition coil or the fuel supply can be behind those symptoms too, so find the cause before you buy. The number of plugs used varies by model, so check the quantity for your model in the "Vehicles it fits" section and replace the full set together.
Fit and size
Build and materials
In the box: the spark plug with its crush washer.
Interchange: BY480-BPR9E · 90793-20026
937 · RN57YC · MZ602088 · BPR9EIX · BY480BPR9E · 9079320026
This part cross-references / interchanges with the following part numbers:
Will the NGK 6853 work in a 2023-2025 Arctic Cat ZR 600 R-XC ES 599cc?
Yes. NGK 6853 is listed for the 2023-2025 Arctic Cat ZR 600 R-XC ES 599cc and a wide range of other models. Look up your own model in the "Vehicles it fits" section.
Is this NGK Iridium IX spark plug pre-gapped?
Yes. NGK 6853 has a pre-gap of .032 inch (0.8 mm) and a J-Gap ground electrode configuration.
What is the center electrode on this NGK iridium spark plug made of?
This plug has a single fine wire 0.6 millimeter iridium tip on the center electrode, with a copper core. The ground electrode is nickel.
Is the NGK 6853 one of the NGK R spark plugs with a resistor?
Yes. NGK 6853 is a resistor-type plug with a resistance of 5000 ohm.
What thread size, reach and heat range does this spark plug have?
This spark plug has an M14 - 1.25 metric thread, a 0.750 inch (19.0 mm) reach, a flat seat with a crush washer, and a heat range of 9.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.