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Marine & Outboard Spark Plugs

NGK Nickel Spark Plug BPR4ES (7222) (6578)

SKU: GB-BPR4ES

$8.80
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The NGK BPR4ES (Stock No. 7222) is a standard resistor spark plug featuring a projected nickel centre electrode and copper-core construction for reliable ignition and efficient heat transfer. Its built-in resistor helps suppress electrical interference, while the 14 mm thread, 19 mm reach and gasket seat suit engines specifically designed for this plug specification. Suitable for selected petrol engine applications where BPR4ES is specified.

Key benefits

Key Benefits

  • - Standard NGK nickel spark plug
  • - Copper-core centre electrode for efficient heat transfer
  • - Built-in resistor helps reduce electrical interference
  • - Projected centre electrode
  • - Durable nickel electrodes
  • - Flat gasket/washer seat
  • - NGK heat range 4
  • - 19 mm long-reach thread
  • - Suitable for engines specifically specifying BPR4ES

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: BPR4ES
  • - NGK Stock Number: 7222
  • - Spark Plug Type: Standard resistor
  • - Thread Diameter: 14 mm / 0.551"
  • - Thread Size: M14 × 1.25
  • - Thread Pitch: 1.25 mm / 0.049"
  • - Thread Reach: 19 mm / 0.748"
  • - Hex / Spanner Size: 20.8 mm / 13/16"
  • - Spark Gap: 0.8 mm / 0.031"
  • - NGK Heat Range: 4
  • - Seat Type: Flat / gasket seat
  • - Resistor: Yes
  • - Centre Electrode: Nickel
  • - Centre Electrode Core: Copper
  • - Electrode Type: Projected
  • - Ground Electrode: Nickel
  • - Number of Ground Electrodes: 1
  • - Sealing Washer: Yes
  • - Brand: NGK
  • - Part Number: BPR4ES
  • - NGK Stock Number: 7222
  • - Spark Plug Type: Standard resistor
  • - Thread Diameter: 14 mm / 0.551"
  • - Thread Size: M14 × 1.25
  • - Thread Pitch: 1.25 mm / 0.049"
  • - Thread Reach: 19 mm / 0.748"
  • - Hex / Spanner Size: 20.8 mm / 13/16"
  • - Spark Gap: 0.8 mm / 0.031"
  • - NGK Heat Range: 4
  • - Seat Type: Flat / gasket seat
  • - Resistor: Yes
  • - Centre Electrode: Nickel
  • - Centre Electrode Core: Copper
  • - Electrode Type: Projected
  • - Ground Electrode: Nickel
  • - Number of Ground Electrodes: 1
  • - Sealing Washer: Yes

Cross-Reference Spark Plugs

  • - NGK: BPR4ES
  • - NGK Stock Number: 7222
  • - Champion: RN16Y

Important Fitment Information

  • The BPR4ES uses a 14 mm × 1.25 thread, 19 mm reach and flat gasket seat. Confirm the engine manufacturer's specified plug before installation, particularly the required heat range, thread reach and electrode gap.
  • Do not confuse BPR4ES with BPR4HS, BR4HS, BPR5ES, BPR6ES or similar-looking NGK numbers. Their dimensions, heat ranges or electrode configurations can differ.

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Rough or unstable idle
  • - Engine misfiring
  • - Hesitation under acceleration
  • - Reduced engine power
  • - Increased fuel consumption
  • - Carbon or oil fouling
  • - Excessive electrode wear
  • - Corrosion
  • - Cracked ceramic insulation

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