Back to catalogue
Marine & Outboard Spark Plugs

NGK Nickel Spark Plug BP8HS-10 (3823)

SKU: GB-BP8HS-10

$8.80
Request a quote

The NGK BP8HS-10 (Stock No. 3823) is a standard non-resistor, projected-tip nickel spark plug used in selected 2-stroke outboard motors. Featuring an M14 × 1.25 thread, 12.7 mm reach and 1.0 mm gap, its copper-core construction provides efficient heat transfer and dependable ignition. It suits selected Mercury, Mariner, Tohatsu and Yamaha marine applications specifically requiring the BP8HS-10 specification.

Key benefits

Key Benefits

  • - Standard nickel spark plug
  • - Projected-tip electrode design
  • - Copper-core centre electrode for effective heat transfer
  • - Non-resistor construction
  • - NGK heat range 8
  • - Factory specification gap of 1.0 mm / 0.039"
  • - Short-reach marine spark plug
  • - Flat / gasket seat
  • - Suitable for selected 2-stroke outboard motors
  • - Direct replacement where BP8HS-10 is specified

Specifications & Dimensions

  • - Brand: NGK
  • - Part Number: BP8HS-10
  • - NGK Stock Number: 3823
  • - Spark Plug Type: Standard nickel
  • - Thread Diameter: 14.0 mm / 0.551"
  • - Thread Size: M14 × 1.25
  • - Thread Pitch: 1.25 mm / 0.049"
  • - Thread Reach: 12.7 mm / 0.500"
  • - Hex / Spanner Size: 20.8 mm / 13/16"
  • - Spark Gap: 1.0 mm / 0.039"
  • - NGK Heat Range: 8
  • - Seat Type: Flat / gasket
  • - Resistor: No – non-resistor
  • - Electrode Type: Projected
  • - Centre Electrode: Nickel with copper core
  • - Ground Electrodes: 1
  • - Terminal Type: Thread/removable terminal
  • Compatible Outboard Motors

Mercury Outboards

  • - Mercury 6 HP – selected 1987–1989 models
  • - Mercury 10X High Performance – BP8HS-10
  • - Mercury 15 HP Sea Pro – 1995–1996
  • - Additional selected Mercury 2-stroke applications specifically specifying BP8HS-10

Tohatsu Outboards

  • - Tohatsu M50D2 – 50 HP, 2-stroke
  • - Tohatsu M70C – 70 HP, 2-stroke
  • - Tohatsu M90A – 90 HP, 2-stroke
  • - Tohatsu M115A2 – 115 HP, 2-stroke

Cross-Reference / OEM Part Numbers

  • - NGK: BP8HS-10
  • - NGK Stock No.: 3823
  • - Tohatsu: 970101009M
  • - Tohatsu: 970101006M
  • - Tohatsu: 970101016M
  • - Tohatsu: 970101020M
  • - Tohatsu: 97010B8HS1
  • - Yamaha: NGK-BP8HS-10-00
  • - Yamaha: BP8-HS100-00-00

Important Fitment Information

  • BP8HS-10 should not be confused with B8HS-10, BR8HS-10 or BPR8HS-10.
  • The NGK designation identifies important differences
  • - B – 14 mm thread
  • - P – projected-tip electrode
  • - 8 – NGK heat range 8
  • - H – 12.7 mm / 1/2" thread reach
  • - S – standard electrode construction
  • - -10 – nominal 1.0 mm electrode gap
  • The BP8HS-10 is non-resistor. Do not substitute a resistor or non-projected version unless the engine manufacturer's specification permits it.

Signs the Spark Plug Needs Replacing

  • - Difficult starting
  • - Rough or unstable idle
  • - Engine misfire
  • - Loss of power
  • - Poor acceleration
  • - Increased fuel consumption
  • - Carbon fouling
  • - Oil fouling
  • - Worn or rounded electrodes
  • - Excessive electrode gap
  • - Corrosion around the plug shell
  • - Cracked ceramic insulator

Shipping

Ships Australia-wide