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Marine & Outboard Spark Plugs

NGK Nickel Spark Plug DPR5EA-9 (2887)

SKU: GB-DPR5EA-9

$8.80
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The NGK DPR5EA-9 (Stock No. 2887) is a projected-tip resistor spark plug used in selected Honda four-stroke outboard motors and other marine engines. Its nickel centre electrode and copper-core construction provide dependable ignition and efficient heat transfer, while the resistor helps suppress electrical interference. DPR5EA-9 features a 12 mm thread, 19 mm reach and 0.9 mm factory gap for engines specifically requiring this plug.

Key benefits

Key Benefits

  • - Standard NGK resistor spark plug
  • - Suitable for selected Honda 4-stroke outboards
  • - Projected-tip electrode design
  • - Copper-core construction for effective heat transfer
  • - Nickel centre electrode
  • - Built-in resistor helps reduce electrical interference
  • - 0.9 mm / 0.035" factory gap
  • - NGK heat range 5
  • - Long 19 mm / ¾" reach
  • - Flat gasket seat

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: DPR5EA-9
  • - NGK Stock Number: 2887
  • - Spark Plug Type: Standard resistor
  • - Thread Diameter: 12 mm / 0.472"
  • - Thread Size: M12 × 1.25
  • - Thread Pitch: 1.25 mm / 0.049"
  • - Thread Reach: 19 mm / 0.750"
  • - Hex / Spanner Size: 18 mm / 0.709"
  • - Factory Spark Gap: 0.9 mm / 0.035"
  • - NGK Heat Range: 5
  • - Seat Type: Flat / gasket
  • - Resistor: Yes
  • - Centre Electrode: Nickel
  • - Centre Electrode Core: Copper
  • - Electrode Type: Projected
  • - Ground Electrode: Nickel
  • - Ground Electrodes: 1
  • - Sealing Washer: Yes

Compatible Outboard Motors

  • Honda Outboards
  • - Honda BF8 – 8 HP 4-stroke
  • - Honda BF9.9 – 9.9 HP 4-stroke
  • - Honda BF10 – 10 HP 4-stroke
  • - Honda BF15 – 15 HP 4-stroke
  • - Honda BF20 – 20 HP 4-stroke
  • Within these families, compatibility varies according to model generation and serial number, so DPR5EA-9 should not be assumed to fit every BF8–BF20.
  • Honda BF8 / BF9.9 / BF10
  • DPR5EA-9 appears in selected generations of Honda's small twin-cylinder four-stroke family, including
  • - BF8A
  • - BF9.9A
  • - BF10A
  • Some later engines changed plug specification, making the full model designation important.
  • Honda BF15 / BF20
  • Selected Honda BF15 and BF20 models also use the DPR5EA-9 family, including certain
  • - BF15A
  • - BF15D
  • - BF20D
  • Again, exact model/year should be confirmed because Honda has used more than one spark-plug specification across these long-running model families.

Cross-Reference Spark Plugs & Part Numbers

  • - NGK: DPR5EA-9
  • - NGK Stock Number: 2887
  • - Honda: 98069-59716
  • - Honda: 98069-59726
  • - Champion: RA4HC

Important Fitment Information

  • The suffix “-9” indicates a nominal 0.9 mm factory electrode gap.
  • Do not confuse
  • - DPR5EA-9 – NGK heat range 5, 0.9 mm gap
  • - DPR6EA-9 – colder NGK heat range 6
  • - DPR7EA-9 – colder NGK heat range 7
  • - DR5HS – shorter 12.7 mm reach
  • - DR5HS-10 – short reach with 1.0 mm gap
  • Although several of these plugs have a 12 mm thread, their reach, heat range and electrode projection differ.
  • For Honda outboards, always confirm the complete BF model designation and serial number before replacing the spark plug.

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Rough idle
  • - Engine misfire
  • - Hesitation during acceleration
  • - Reduced engine performance
  • - Increased fuel consumption
  • - Carbon deposits
  • - Fuel or oil fouling
  • - Worn centre or ground electrode
  • - Corrosion
  • - Cracked ceramic insulator

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