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Marine & Outboard Spark Plugs

NGK Iridium Spark Plug DCR7EIX (3605)

SKU: GB-DCR7EIX

$32.30
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The NGK DCR7EIX (Stock No. 2493) is an Iridium IX resistor spark plug featuring a fine 0.6 mm iridium centre electrode and tapered-cut ground electrode. Designed for excellent ignitability, anti-fouling performance and durability, it uses a 12 mm thread, 19 mm reach, 16 mm hex and 0.8 mm factory gap. It is suitable for engines specifically specifying DCR7EIX rather than the projected-tip DCPR7EIX.

Key benefits

Key Benefits

  • - Iridium IX performance spark plug
  • - Fine 0.6 mm iridium centre electrode
  • - Excellent ignition characteristics
  • - Improved resistance to spark erosion
  • - Taper-cut ground electrode
  • - Strong anti-fouling characteristics
  • - Built-in resistor reduces electrical interference
  • - Copper-core construction assists heat dissipation
  • - NGK heat range 7
  • - Pre-gapped at approximately 0.8 mm

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: DCR7EIX
  • - NGK Stock Number: 2493
  • - Series: Iridium IX
  • - Thread Diameter: 12 mm / 0.472"
  • - Thread Size: M12 × 1.25
  • - Thread Reach: 19 mm / 0.748"
  • - Hex / Spanner Size: 16 mm / 5/8"
  • - Factory Spark Gap: 0.8 mm / 0.031"
  • - NGK Heat Range: 7
  • - Seat Type: Flat / gasket
  • - Resistor: Yes
  • - Centre Electrode: Iridium
  • - Centre Electrode Diameter: 0.6 mm
  • - Centre Electrode Type: Non-projected
  • - Ground Electrode: Taper-cut
  • - Terminal: Threaded terminal with nut

Cross-Reference Spark Plugs

  • - NGK: DCR7EIX
  • - NGK Stock No.: 2493
  • - Champion: A8YC
  • - Champion: 9701
  • - Champion: OE187
  • - Champion: OE187T10
  • - Champion: RA7WHP
  • - Champion: RA8GHC

Important Fitment Information

  • Do not substitute DCR7EIX for DCPR7EIX merely because the thread, reach and hex dimensions match. The electrode projection is different.
  • Also distinguish DCR7EIX from
  • - DCR8EIX – colder NGK heat range 8
  • - DCR9EIX – colder NGK heat range 9
  • - DCPR7EIX – projected-tip Iridium IX
  • - DR7EIX – 18 mm hex rather than 16 mm

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Engine misfire
  • - Rough or unstable idle
  • - Hesitation during acceleration
  • - Reduced performance
  • - Excessive carbon fouling
  • - Fuel or oil contamination
  • - Worn electrode
  • - Corrosion
  • - Cracked ceramic insulator

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